Super Mario Bros. Main Character Index
Main characters: The Mario Brothers | Allies (The Princesses) | The Koopa Kingdom (Bowser — Bowser Jr. — The Koopalings — Other High-Ranking Subordinates — Bosses) | Assorted Nasties
RPG characters: Super Mario RPG | Paper Mario (64 — The Thousand-Year Door — Super — Sticker Star — Color Splash — The Origami King) | Mario & Luigi (Minion Quest: The Search for Bowser)
Spinoff series: Yoshi's Island | Luigi's Mansion | Mario Golf | Mario Tennis | Super Mario Maker | Donkey Kong series (Kongs) | Wario series (Wario and Waluigi)
Crossovers: Punch-Out!! | Super Smash Bros. | Mario and Sonic at the Olympic Games | Skylanders | Mario + Rabbids Kingdom Battle | Mario + Rabbids Sparks of Hope
Other media: The Great Mission to Save Princess Peach! | Super Mario Bros. (DiC) | Super Mario Bros. (1993) | The Super Mario Bros. Movie

https://static.tvtropes.org/pmwiki/pub/images/b35ededc_51d4_4006_99ca_61fd2662bc18.jpeg

Mario and Sonic at the Olympic Games is a crossover series between the Super Mario Bros. and Sonic the Hedgehog series. As this character list is about this series in particular, one should go see the respective franchises' Character Sheets for much more detailed info about these characters.

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Athletes

Team Mario

Beijing

Mario

Nintendo's world-famous mascot and the captain and face of Team Mario. Super Mario faces off and teams up with his rival-turned-friend Sonic The Hedgehog.

Bash Brothers: Not only with his brother, Mario forms a pretty powerful friendship and alliance with Sonic in Adventure Tours and London 3DS' story mode to stop Bowser and Dr. Eggman.
The Captain: Of his namesake team.
Character Select Forcing: In Vancouver 2010 DS, only the mascot heroes are playable in the final showdown against the villains Bowser and Dr. Eggman.
Commonality Connection: Their names are in the title, and they are the team leaders and champions of their respective universes, it's no-brainer Mario would be buddies with Sonic the Hedgehog.
Friendly Rivalry: With Sonic the Hedgehog.
Heroic Mime: He's Mario, it's to be expected. Since he doesn't talk, Toad tags along to speak for him. Come Rio and Tokyo 2020, he forms a Silent Bob dynamic with Sonic.
Jack of All Stats: Being the former Trope Namer, this is a given. He is an All-Around type and the most balanced character in the game.
Headbutting Heroes: With Donkey Kong, as a result of their long history together.
The Hero: In the series' story modes, he teams up with Sonic to solve the problem. In London 2012 3DS, he, Sonic, Luigi, and Tails make up the Heroes Team.
Intergenerational Friendship: Mario is in his mid 20s and has a friendship/rivalry with Sonic, who is 15.
Mundane Utility: In Vancouver DS, Only Mario can use pipes and mushrooms to navigate the field. In this case, use Mushrooms to turn into Mini Mario (The special form, not the toy) and use his tiny size to pass small corridors and prevent falling through thin ice.
Mythology Gag: Mario's Special Dash in the Athletic Events is the Star Spin Attack from Super Mario Galaxy.
Playing with Fire: A lot of Mario's Special Moves revolve around this of course.
Red Is Heroic: It's Mario after all. His Red is a very fitting and contrasting counterpart to Sonic's blue.
The Rival: Against Sonic.
Sibling Rivalry: According his and Luigi's flags in Rio Wii U, the Bros. are competing to see which one of them can win the most medals in Rio.
The Silent Bob: Mario becomes this with Sonic come Rio and Tokyo, due to the latter talking once more, beforehand, he was this with Toad.
Trapped in TV Land: Mario is trapped along with Bowser, Sonic, and Eggman in the Tokyo 1964 game system in Tokyo 2020.
True Companions: Mario has special victory animations with Luigi, Yoshi, Princess Peach, Bowser, Donkey Kong and Sonic in Sochi 2014. Though, in the case of Bowser and DK, it's not so friendly. Mario also has a special animation with Toad in Rio Wii U.
Wrong Genre Savvy: In London 2012 3DS, when Mario, Luigi, and Toad learn that Bowser and his goons are involved in the latest diabolical scheme, they quickly search for Peach in Hyde Park not only to find her absolutely fine, but she has also already taken care of the problem herself. Thank you, Mario, but your Princess has already saved herself.

Luigi

The other famous Super Brother, the Green Machine Luigi joins the group to help lead Team Mario to victory.

Bash Brothers: With Mario (of course).
Character Select Forcing: In Vancouver 2010's Adventure Tours. As the group meets up with King Boo in Polastraits, the ghost king boasts that he'll only face someone who's scared of ghosts. Of course, King Boo eggs on poor Luigi, who isn't thrilled to face him.
Commonality Connection: Luigi and Tails are the signature sidekicks and lancers to the good guys. Naturally, it was only fitting for them to be best buds.
A Day in the Limelight: Tokyo 2020 is ultimately about Luigi's attempt to rescue his brother, friends, and enemies from Eggman's game system.
Face Your Fears: Luigi faces down a gang of Boos in Vancouver DS, in order to take back the key they stole.
Happy Dance: Luigi breakdances whenever he wins an event, and he's very damn good at it. Enough to rival Sonic.
Heroic Mime: Much like his brother, Luigi doesn't talk. So usually some other character is paired up with Luigi to speak for him, like Toad, Tails, or Charmy Bee.
Jack of All Stats: Like Mario, he's an All-Arounder. But compared to his brother who plays this straight, Luigi leans more towards speed.
The Hero: Luigi is a part of Team Heroes in London 2012 3DS alongside Mario, Sonic, and Tails.
Intergenerational Friendship: Luigi's shown to be good friends with Tails, despite being almost twenty years older.
Playing with Fire: Like Mario, only with Green Fire.
The Rival: Against Shadow.
Sibling Rivalry: According his and Mario's flags in Rio Wii U, the Bros. are competing to see which one of them can win the most medals in Rio.
Technicolor Fire: Luigi wields fire powers like his brother, but they're green instead of red.
True Companions: Luigi has special victory animations with Mario and Tails in Sochi 2014.
Wrong Genre Savvy: In London 2012 3DS, when Mario, Luigi, and Toad learn that Bowser and his goons are involved in the scheme for to fog London, they quickly search for Peach in Hyde Park not only to find her and the others fine, but she has also already taken care of the problem herself.

Peach

The Princess from the Mushroom Kingdom has taken a break from getting kidnapped and will help Team Mario win the Olympics.

Action Girl: This is one of the spinoff series where Peach is portrayed as more independent than normal. Vancouver 2010's Adventure Tours shows she's really excellent in the Snow Machine Fight, so much that she's the only one who can partake in the event to win a Shooting Rifle for the Biathlon events. In London 3DS, she actually takes up the damsel-saving role. See below.
Bare Midriffs Are Feminine: Peach is consistently portrayed as the most feminine cast member of the Mario series, and she wears a midriff-baring track uniform in the 2020 Tokyo Olympics.
Beat the Curse Out of Him: In London 3DS, Peach frees Rouge the Bat from her brainwashing by defeating her in a duel.
Character Select Forcing: In Vancouver DS, she can only be challenged (and ultimately recruited) if the player uses Mario. She will talk to Sonic, but will only ask him where Mario is.
Commonality Connection: Princess Peach and Amy Rose pair up and get along very well, being the respective major girl characters of their series, as well as pink being their signature colors.
Damsel in Distress: Subverted in a funny way in London 2012 3DS. Mario, Luigi, and Toad freak out when they learn that Bowser is up to his usual tricks, they rush only to find Peach absolutely fine. Also inverted as Peach and Blaze actually play the role as heroes as they save Daisy and Amy Rose from Phantasmal Fog Impostors in Hyde Park.
Heart Beat-Down: Peach's special moves revolve around this.
Intergenerational Friendship: Peach is in her twenties and is shown to be good friends with Amy Rose, who is 12.
Let's Get Dangerous!: In London 3DS, Peach with Blaze fight off the Fog imposters, who have them and the Toads surrounded.
Limited Animation: Severely limited. Her appearance in the Classic events in Tokyo 2020 has Peach in her original sprite from Super Mario Bros, with no animation frames at all.
The Leader: Peach serves as one in London 3DS among the Girls group (and the Toads), with Blaze serving as her lancer.
Leotard of Power: Peach wears this for swimming and gymnastics events.
Ms. Fanservice: Thanks to her skin-tight sports gear (especially her leotard). Extra mention goes to her wetsuit in the 2020 Tokyo Olympics.
Mythology Gag: Peach's special dash while playing Athletics is her special midair float from Super Mario Bros. 2.
Nice Girl: A very sweet and friendly princess who is very kind and supportive of others. Peach uses her charm to cheer up a Thwomp blockade in Vancouver DS.
The Power of Love: In Adventure Tours, Peach uses her sweet demeanor to butter up a Thwomp blockade in Frostown. Her charm actually causes it to let the group pass.
Poor Communication Kills: Peach and Amy had Bowser and Dr. Eggman's invitations ready, but trusted two Toads to get it to them, but they end up losing them. Peach and Amy re-write the invitations, but don't get them to a visibly upset Bowser and Eggman on time, as they went off already, so Peach, Amy, Blaze, and Daisy figured they found the original invitations the Toads lost before. The result? The two villains feel slighted, get ticked, and plot their revenge by unleashing the Phantasmal Fog on London, starting up all the crazy shenanigans. Whoops.
Pretty in Mink: Alongside Princess Daisy, this is Peach's outfit in the Winter Games and the Equestrian events in London.
Princesses Prefer Pink: It's her signature color of course. She just wouldn't be Peach if she didn't wear pink.
The Smurfette Principle: Peach is the only female character for the Classic Events in Tokyo 2020.
Tomboyish Ponytail: Peach always has her long golden hair tied up in a ponytail, for obvious and practical reasons.
Took a Level in Badass: In London 3DS, she actually saves Daisy and Amy from the Phantasmal Fog Impostors.
True Companions: Peach has special victory animations with Mario, Daisy, and Amy Rose in Sochi 2014.
Unwitting Instigator of Doom: See Poor Communication Kills above. Peach and Amy would probably have been better served to make certain Bowser and Eggman received their invitations in London 3DS.
Weak, but Skilled: Skill-type. Peach isn't physically gifted, but she excels in technique and finesse, she's decently fast as well.

Yoshi

Mario's good dinosaur buddy. He takes on the Olympics with his great speed and excellent jumping prowess.

Hero of Another Story: Yoshi is the star of his own series of games.
Intelligible Unintelligible: Even though Yoshi only talks in Pokémon Speak, the other characters have absolutely no problem understanding him.
Irony: Yoshi can ride horses in the Equestrian events. Considering how he was originally conceived as a Power Up Mount, Yoshi has really come full circle.
Pokémon Speak: Yoshi! Yoshi! Yoshi!
Odd Friendship: Yoshi and Silver are True Companions, even through they have little to nothing in common.
Overly-Long Tongue: It's Yoshi's signature trait of course. In Vancouver DS, he uses his tounge to push buttons in a Simon Says Minigame.
Super-Speed: He's a Speed-type like Sonic. His stats are very heavily skewed towards acceleration over top speed, though, and he's not actually much faster than the All-Around (but slightly speed-focused) Luigi and Blaze.
True Companions: Yoshi has special victory animations with Mario and Silver in Sochi 2014
The Unintelligible: Being Yoshi, he's doesn't really talk. The subtitles do that for him.

Bowser

The big bad King of the Koopas and Mario's eternal arch-enemy. He takes a break from princess kidnapping and goes for the gold instead. Of course, he wouldn't be Bowser if he didn't cause some measure of trouble in the Olympics...

Actually a Doombot: In London 3DS, When cornered by Vector and Knuckles, it was revealed "he" was a fog impostor the entire time. The Real Bowser was stationed in the hideout the whole time.
A Father to His Men: London 3DS shows once again Bowser really cares about his minions. So much in fact that even when his minions try to cheer him up, Bowser plays along with it, and reveals to Bowser Jr. that he has been hiding a toothache to make them feel better. Awww!
Affectionate Nickname: Just how strong is Bowser's friendship with Dr. Eggman? The Koopa King actually has a nickname for him, referring to him as "Eggy". Adorable.
Arch-Enemy: To Mario, but his Big Bad Duumvirate with Dr. Eggman forms an dual Arch Enemy team to both Mario and Sonic.
Bait-and-Switch: In Vancouver DS, once it looks like Mario and Sonic's Adventure is complete by freeing the last Snow Spirit, the Doc and Bowser capture Frosty and escape to Blizland.
Big Bad Duumvirate: With Dr. Eggman. Their Dragons, Bowser Jr. and Metal Sonic join them to form a Legion of Doom.
Brains and Brawn: When they team up, he's the brawn to Eggman's brains.
Card-Carrying Villain: Olympics or no Olympics, it's basically Bowser's job to cause trouble.
Commonality Connection: The fuel behind his Villainous Friendship with Dr. Eggman. It's very easy to connect with a fellow villain who has an Arch-Enemy just like you.
Divide and Conquer: His Evil Plan in Road to Rio. To use the two Suit boys as an Apple of Discord to create a divide between the Mario and Sonic gyms, so he and Dr. Eggman can take over the Olympics unopposed.
Evil Is Petty: Not invited to the Olympics? Fog up London with the Phantasmal Fog and endanger the populace! Though, it was all because of a misunderstanding.
For the Evulz: Why do the Bowser and Dr. Eggman kidnap the Snow Spirits in Vancouver? Why do they want to ruin the real olympics to start their own olympics? Because it's evil that's why.
Go-Karting with Bowser: Duh, he's Bowser. Deliberately invoked in the ending of London 3DS, where right after getting their plans thwarted, Mario and Sonic don't bear a grudge and even vouch for him and Dr. Eggman to enter the Olympics.
Legion of Doom: Formed with Dr. Eggman as well as Bowser Jr and Metal Sonic.
Menace Decay: In Vancouver DS, Bowser is a straight up classic bad guy, in London 3DS, his villainy is merely petty revenge than outright malice. At least he's given a good excuse this time.
Playing with Fire: Bowser uses his trademark fire breath to actually melt all the Snow in Vancouver DS.
Sore Loser: In Road to Rio, Bowser has aspirations to win the first golf gold medal in 112 years, but when the player defeats him, he steals his/her medals and runs away.
Start My Own: A chief motivation for his villainy in the series. He teams up with Eggman to mess up the Olympics in Vancouver and London.
Super-Strength: Bowser is a Power-type character and one of the more balanced ones, allowing him to excel in all Power events.
Trapped in TV Land: In Tokyo 2020, Bowser is one of the victims trapped inside the Tokyo 1964 game system.
True Companions: Bowser has victory animations with Mario, Bowser Jr. (natch), and Dr. Eggman in Sochi 2014. With Mario, though, it's not quite so friendly.
Villainous Friendship: In the Mario RPGs, Bowser despises other villain characters and never gets along with them, even himself. But in the Olympics, Bowser is extremely cooperative and friendly with Dr. Eggman. Guess the Koopa King was taken in by the Doctor's incredible charm, or it could just be the two villains have quite a lot to relate to besides just being evil.
Villain Team-Up: Often teams up with Eggman to cause trouble.
Your Princess Is in Another Castle!: Leave it to the guy who started it all to do pull something like this. In Road To Rio Once the player's Mii defeats him on the final day, Bowser steals the player's medals and takes off.

Daisy

The energetic Tomboy Princess of Sarasaland and Peach's good friend.

Bare Midriffs Are Feminine: The second most prominent female cast member of the Mario series, who wears a midriff-baring track uniform in the 2020 Tokyo Olympics, akin to her blonde counterpart's.
Berserk Button: In Vancouver DS' Adventure Tours, she REALLY doesn't take it well when one of Dr. Eggman's robots ruins a Freezalea flower patch that a Chao made especially for her in Icepeak, opting to chase it out herself.
The Big Guy: Daisy is the fun-loving and energetic one of the Girls group.
Commonality Connection: Daisy invokes this on Blaze the Cat the moment she meets her in Vancouver DS. Blaze is a princess, and Daisy takes an instant liking to her because of this.
Damsel in Distress: In London 2012 3DS, Daisy with Amy have a really bad run-in with Phantasmal Fog impostors and Peach and Blaze have to help them out.
Friendly Rivalry: With Blaze. Turns out, Daisy takes a lot of pride in being a princess, and takes a liking to Blaze just because of this fact.
Genki Girl: Daisy is very energetic, and funloving. Not only that, but she loves hanging out with her friends and participating in the olympics.
Green Thumb: Falling in line with her flower motif, Daisy uses this in a lot of her special moves.
Leotard of Power: Like Peach's, only yellow and orange. Daisy wears this for gymnastics and swimming.
Ms. Fanservice: Daisy looks very attractive especially in her leotard in London 2012. Tokyo 2020 gives Daisy a wetsuit for Surfing events like her blonde counterpart.
No Indoor Voice: Very energetic, very funloving and very loud.
Pretty in Mink: Just like Peach, she wears a mink outfit for the Winter Olympics and the Equestrian events in London.
Red Oni, Blue Oni: The Red to Blaze's blue, whenever they're paired up.
Sent Into Hiding: In Vancouver DS, Daisy was practicing her figure skating in Blizland until the villains showed up and built their fortress. She put herself in hiding out of their sight and practiced in secret.
Snowball Fight: Daisy chases away Kiki by throwing snowballs at it in Vancouver DS.
Tomboy with a Girly Streak: She may be energetic and lively, but Daisy really appreciates beautiful flowers.
True Companions: With Peach and Blaze in Sochi 2014
Super-Speed: She's a speed-type character. Much like Yoshi, she has more balanced stats compared to the other Speed characters however.

Wario

Mario's very greedy and twisted counterpart.

Acrofatic: If his own series didn't attest to that enough already. Wario is quite the athlete with very good stamina.
Anti-Hero: Wario doesn't really care that Bowser and Dr. Eggman are trying to ruin the Olympic Games with the Phantasmal Fog until he learns their evil scheme is interfering with his snack business, at which point, he gladly volunteers to help out the good guys.
Fartillery: In Vancouver DS, Wario puts his explosive gas to good use to stop a Chain Chomp blockade in Blizland.
Fat and Skinny: With Waluigi, he's the fat, and Waluigi's the skinny.
Hero of Another Story: Like DK and Yoshi, Wario stars in his very own series of games.
Malicious Misnaming: Wario clearly has no respect for Dr. Eggman, as he refers to him as Dr. Egghead.
Money Fetish: Naturally, He's Wario.
Only in It for the Money: Wario's sole motivation to coming to London in the 3DS version. He wants to open up a snack business to sell concessions at ridiculous prices.
Recurring Boss: He and Waluigi are this in Vancouver DS. You encounter them twice before you can recruit them.
Shock and Awe: Wario's special move in Boxing in Rio 2016 is a powerful hook, delivered with sparkling electricity.
Shut Up, Hannibal!: In London 3DS, Wario and Waluigi pull a pretty good one on Dr. Eggman when the Doc tries to pull a "Not So Different" Remark by calling out Wario and Waluigi on their greed.
Dr. Eggman: It's just one moneymaking scheme after another with you greedy nitwits, isn't it?''
Waluigi: You are one to talk! Always with the evil plots, you!''
Wario: Yeah! Compared to you, we're angels!
Stone Wall: Wario is a Power-Type character who isn't the fastest or even the strongest. Wario's edge is his stamina. He'll just outlast you instead.
Super-Strength: As a Power-type character. Wario usually isn't the fastest or the strongest. He excels more in stamina, giving him an edge in endurance events.
Those Two Guys: With Waluigi.
True Companions: With Waluigi and Knuckles in Sochi 2014.
We Will Meet Again: Him and Waluigi are encounted twice over the course of Vancouver DS. The first time in Polastraits, where they run away afterwards, but again in Icepeak, where they join the team for good this time.

Waluigi

An oddball character who sees himself as Luigi's rival.

Anti-Hero: Waluigi was initially uninvolved and uninterested in Bowser and Dr. Eggman's plan until Metal Sonic breaks his invention, the Waluigiscopes. At which point, he teams up with Wario to wage war against the Doctor.
Black-and-Grey Morality: When Wario and Waluigi go after Dr. Eggman in London 3DS. Dr. Eggman even lampshades it, calling the pair a bunch of crooks and really no better than he is, and in some cases worse. Wario and Waluigi of course are having none of it.
Brilliant, but Lazy: He's very intelligent and knows how to make machines, but is also unwilling to get down and dirty in his feats of mischief.
Crippling Overspecialization: Waluigi possess the highest skill stat in the game, but subpar in everything else.
Cut Lex Luthor a Check: Possesses a great talent for gadgets, but only uses it for petty mischief.
Gadgeteer Genius: Turns out, Waluigi is a brilliant inventor, as he can build scopes and binoculars, unfortunately, he only uses his talent just for spying on Luigi.
Insane Troll Logic: In London 3DS: "With these Waluigiscopes, Waluigi will spy on Luigi like a hawk and learn all of his weaknesses. Then, when Waluigi finally beats Luigi, he will be the number one superstar of the world! Wa ha ha!"
Keeping the Enemy Close: Waluigi's (along with Wario's) motivation for finally joining Mario and Sonic in Vancouver DS, of course, they don't really do much with it afterwards, and become steadfast allies all the way.
Living Lie Detector: Waluigi is such a cunning sneak by himself, he himself can easily spot deception. In Vancouver DS, Waluigi proves this by seeing through a Shy Guy's lies and exposes what he is hiding in Cubyrinth, allowing the group to continue.
Squishy Wizard: Waluigi typically has the highest skill of all the characters in the game, but everything else ranges from mediocre to not good.
Stalker without a Crush: London 3DS reveals that Waluigi actually is this to Luigi. He even invented Waluigiscopes just for the purpose of doing so.
The Rival: He sees himself as this to Luigi, though it's very unlikely Luigi has ever noticed.
Third-Person Person: Waluigi is so important, Waluigi has no need for pronouns!
This Means War!: Waluigi goes after Metal Sonic for accidentally breaking his Waluigiscopes in London 3DS.
True Companions: With Wario and Shadow in Sochi 2014
Token Evil Teammate: Not evil per se, but Waluigi is definitely a jerk and sneaky.
Weak, but Skilled: As usual, Waluigi is a Skill/Technique-type. He has the highest technique of all the characters, although he's also among the slowest and the weakest.
You Just Told Me: Waluigi pulls a very good one on a sneaky Shy Guy in Vancouver DS to expose the Shy Guys' secret hideout in Cubyrinth.

Vancouver

Bowser Jr.

Bowser's son and the Prince of the Koopas.

Accidental Hero: In London 3DS, Junior's ride on Big Bullet Bill goes awry and falls on Dr. Eggman's robots, destroying them. Saving both Omochao and a Chao from being attacked. Of course, being a No-Respect Guy, Junior deliberately takes credit for it so he can get some respect once he finds out he saved them.
The Dragon: He's this to his father.
Even Evil Has Loved Ones: He allies himself with the group in Tokyo 2020 on principle of getting his father out of the Tokyo 1964 game.
Foil: In Tokyo 2020, he becomes this to Eggman Nega. They are both descendants of the main villains and believe strongly in Never My Fault. However, Bowser Jr. is a lot closer to Bowser (being his son), holds him in high esteem, and is genuinely concerned for him in Story Mode. What's more, his Never My Fault moments are usually directed towards the heroes and he is far younger.
Ineffectual Sympathetic Villain: Poor little guy, he uses his Dad's voice to make himself seem threatening in London 3DS, but the other characters just don't take him seriously.
Jack of All Stats: He's an All-Around type.
Legion of Doom: He forms one with his dad, Dr. Eggman, and Metal Sonic.
Odd Friendship: Despite the fact that he's a robot, Bowser Jr. and Metal Sonic became good friends.
Overlord Jr.: His name says it all. He's Bowser's son.
No-Respect Guy: Junior is an Ineffectual Sympathetic Villain, and he doesn't like it. He goes to any lengths to earn some respect.
Spoiled Brat: Most prominently displayed in Tokyo 2020's story mode where, even when working alongside the good guys, Bowser Jr. will still attempt to sabotage them in order to make himself look good.
True Companions: Has special victory animations with Bowser and Metal Sonic in Sochi 2014.
Villain: Exit, Stage Left: In London 3DS, Junior with help from Big Bullet Bill stages a quick getaway from Yoshi, Shadow and Silver once he realizes he said too much about his father's plans.
Villainous Friendship: With Metal Sonic.
Villain Team-Up: With Metal Sonic in Vancouver's Adventure Tours. Upset that they were left out of the story, the two Dragons set up their own challenges to thwart the heroes.
"Well Done, Son" Guy: While Bowser is already very proud of his son, Bowser Jr. is constantly thinking of ways to make him even more proud. Depending on the game, this can make him sympathetic or antagonistic.

Donkey Kong

The famous and iconic Jungle Hero of DK Island.

Beat the Curse Out of Him: In London 3DS, DK beating the brains out of Omega knocks a part out of him that was making him go haywire. He forgives him after he calms down... on the condition that Omega joins the heroes to stop the bad guys.
Berserk Button: Don't mess with DK's bananas.
Beware the Nice Ones: DK is a good fellow who is wild and not too bright, but will smash you if you mess with him.
Bullying a Dragon: E-123 Omega (brainwashed) makes the terrible mistake of attacking Donkey Kong while on his break, and ruining his banana snack. DK proceeds to open a can of wrestling whoop-ass on Omega.
Climbing Climax: DK puts his climbing prowess to great use in Vancouver DS, as he scales a contraption to push a button on top. All while avoiding falling debris.
Crippling Overspecialization: DK's power has no equal, but is average to poor in other stats.
Headbutting Heroes: Mario and DK are both clearly good guys, but their rivalry from the Arcade Days and the Mario vs DK series still runs deep.
Hero of Another Story: Just like Wario and Yoshi, Donkey Kong has his own series of games.
Intelligible Unintelligible: Much like Yoshi, DK only speaks in Grunts and "Ooks", but this doesn't stop any of the other characters from understanding him.
Irony: He has a Friendly Rivalry with Vector the Crocodile. Ironic, considering DK has had many run-ins with King K. Rool and the Kremlings in the past in his own series of games.
Odd Friendship: With Vector the Crocodile.
The Rival: Against Vector, and Mario.
Super-Strength: The strongest of all the Power-type characters.
The Unintelligible: He grunts and ooks, but the subtitles take care of that for him.
Unskilled, but Strong: DK's an absolute powerhouse with the highest power stat in the game but his technique and skill is the lowest of all the characters.
True Companions: With Mario, Vector, and Knuckles in Sochi 2014, and Diddy in Rio 2016... Though he and Mario don't get along too great.

Rio

Nabbit

From New Super Mario Bros. U, the rabbit thief goes for the gold.

Rascally Rabbit: He has a rabbit motif, particularly with his hat.
Put on a Bus: Is one of the few newcomers from Rio to not return at all for Tokyo 2020.
Suddenly Voiced: He has (written) dialogue for the first time.
Super-Speed: In Rio 2016, his highest stat is Speed, and his signature event is the 100M Dash.

Diddy Kong

From Donkey Kong Country, Donkey Kong's little buddy and adventuring partner.

Lightning Bruiser: Is exceptionally fast, and his signature event is Rugby.
Promoted to Playable: Diddy Kong was originally a Mii suit in London and Vancouver. He graduates to playable in Rio.
True Companions: With Donkey Kong, naturally.

Rosalina

The mysterious protector of the cosmos from Super Mario Galaxy. Having seen previous Olympics from the reaches of space in her Comet Observatory, she has decided to join the fun in person.

The Comically Serious: In Road to Rio, even when engaging or talking about something comparatively silly and unimpressive like the Gymnastics Plus event, Rosalina never breaks from her dignified, dramatic, serious tone in her dialogue.
Ghostly Glide: Humorously zigzagged. Even on earth in normal gravity, Rosalina inexplicably floats just off the ground whenever you see her in the hub world. She turns off her power in order to compete in Rhythmic Gymnastics, and walks after she is done with her demonstrations. On the medal stand, she is back to floating again.
Hidden Depths: Rosalina developed a liking for Rhythmic Gymnastics, which made the Lumas encourage her to participate in the Olympics.
Leotard of Power: Rosalina wears this for gymnastics events. It's similar to Peach and Daisy's except light blue, and she has long sleeves.
Ms. Fanservice: Rosalina is given a leotard just like Peach and Daisy. Unlike Peach and Daisy, it is the only thing Rosalina wears, as she is only playable in Gymnastics events. Tokyo 2020 gives her an equally alluring wetsuit due to her only being playable in Surfing there.
Not So Above It All: Rosalina is the protector of the cosmos and watches over the stars, but even she can't resist having some fun and winning those shiny gold medals. She witnessed previous Olympic games from far away, and decided to join them this time.
True Blue Femininity: Cyan is her dominant color.

Birdo

From Super Mario Bros. 2, A quirky pink dinosaur lady who wears a bow.

Ambiguous Gender: As you may expect, since it's Birdo.
Demoted to Extra: Although playable in the 3DS version, Birdo is dropped to NPC in the Wii U version of Rio.
Flunky Boss: In Sochi 2014, she leads a team of Birdos in Ice Hockey.
Promoted to Playable: Birdo was Dummied Out of the first game, a VIP in Vancouver, and becomes a rival in London and Sochi. She finally makes playable in the 3DS version of Rio.

Ludwig von Koopa

The blue-haired member of the Koopa lings.

Hufflepuff House: Unlike the other Koopalings, Ludwig does not appear in Road to Rio mode or outside of the Table Tennis event.
Put on a Bus: Is no longer playable and absent in the Wii U version of Rio 2016.
- The Bus Came Back: He returns in Tokyo 2020 as the guest character for fencing and, unlike Rio 2016's 3DS version, he actually appears in the storyline.
Royal Rapier: He's a high-ranked member of the Koopa Troop (and one of Bowser's children) and probably the most classy Koopaling. Naturally, he is the guest of the Fencing event.

Wendy O. Koopa

The Sweet (but sour) female Koopaling.

Roy Koopa

The sunglasses-wearing bad boy of the Koopalings.

Cool Shades: It wouldn't be Roy without his trademark hot pink sunglasses.
Put on a Bus: He's no longer playable and absent in the Wii U version just like Ludwig, and unlike him, doesn't even return for Tokyo 2020.

Larry Koopa

The youngest of the Koopalings.

Punch-Clock Villain: Mentions that Bowser took him along to cheer him on in the Olympics and generally acts pleasant, almost lacking his usual Hair-Trigger Temper

Dry Bones

Once a Rival, Dry Bones makes his playable appearance in Rio 3DS.

Dem Bones: The guy may be dead, but that doesn't stop him.
Mook Lieutenant: A single Dry Bones takes up the role as a boss in Vancouver DS.
Promoted to Playable: Dry Bones was one of the rivals in previous Olympic games, but graduated to playable in Rio.
Put on a Bus: Despite being playable in the 3DS version, Dry Bones is seemingly absent in the Wii U version of Rio and Tokyo 2020.
Would Hurt a Child: Dry Bowser and Dry Bones don't even bother challenging Toad and Omochao with an Olympic Event in London 3DS, they straight up charge in to attack the two before Mario and Luigi stop them.

Dry Bowser

Bowser's skeletal form. This bony transformation grants him the agility of lightweight competitors while maintaining his heavyweight power.

Decomposite Character: Was originally Bowser's undead self, but is his minion and a separate character in these games.
Dem Bones: Like Dry Bones, being a skeleton does nothing to stop him.
Go-Karting with Bowser: He may be a skeleton, but he's still Bowser.
Final Boss: In the Festival mode of Vancouver Wii, no matter if the player plays as a solo character or as a team, Dry Bowser will always be the last rival the player has to face off.
Flunky Boss: Dry Bowser is the leader of the Dry Bones, but a minion of Bowser in these games. In Vancouver Wii, he takes on the player in Hockey with a team of Dry Bones.
King Mook: Dry Bowser to the Dry Bones.
Pre-Final Boss: In Vancouver DS, he will be faced before Bowser and Dr. Eggman.
Promoted to Playable: After being a rival in the last three games, he becomes a playable character in Rio.
Put on a Bus: Dry Bowser does not return as a playable character in Tokyo 2020.
Would Hurt a Child: Has no problem being rude and aggressive towards the younger competitors.
What Happened to the Mouse?: Dry Bowser is the only rival not seen in the picture at the end of Adventure Mode in Vancouver DS.
You Have Failed Me: Chases his Dry Bones teammates if they lose the hockey game in Festival mode of Vancouver Wii. Understandable, as they were the ones out on the ice while Dry Bowser was the goalie.
Your Princess Is in Another Castle!: Just when the characters are about to claim the legends trophy in Sochi 2014, Dry Bowser along with Eggman Nega and Rouge the Bat ambush them and take the trophy, forcing the character to beat them in the Winter Sports Champion race.

Toad

Princess Peach's little mushroom retainer upholds the rules in the Olympics. He's actually a crucial part of the team in the games' story modes. He finally becomes playable in the Wii U version of Rio 2016

Intelligible Unintelligible: In Vancouver DS and London 3DS, Toad tags along with Mario and Luigi to speak for them. When Mario and Luigi meet up with Sonic and Tails, he and Tails split the duties.
Mr. Exposition: Toad tends to explain simple plot points, and the blatantly obvious. Especially in Vancouver DS.
Non-Action Guy: Toad is not actually playable, so he makes himself helpful in other ways.
Promoted to Playable: The sole case of this for the Wii U version of Rio, where Toad appears as a guest character.
Tagalong Kid: In London 3DS, where he accompanies the heroes on their quest to stop the Phantasmal Fog. Though this is mostly to speak for Mario and Luigi, as seen above. Tails takes over when Toad almost passes out from the fog.
True Companions: Has a special victory animation with Mario in Rio 2016.

Toadette

Introduced in Mario Kart: Double Dash!!, the female counterpart of Toad finally joins the festivities in Tokyo 2020 as a replacement for him.

Cheerful Child: Toadette is an execeptionally upbeat and carefree girl.
Super-Speed: One of the fastest competitors in the series, and her main event is 110m Hurdles.
Suspiciously Similar Substitute: For Toad from Rio 2016.

Team Sonic

Beijing

Sonic

Tokyo 2020

^{Rio 2016}

^{Sochi 2014}

^{London 2012}

^{Vancouver 2010}

^{Beijing 2008}

The world-famous supersonic hedgehog, the namesake of Team Sonic, and Sega's mascot.

Badass in Distress: In Road to Rio 3DS.
Bash Brothers: With Tails of course, but the big attraction in this series is his team up with Mario, and it's pretty damn potent.
Blow You Away: A lot of Sonic's special moves use this, owing to his speed.
Blue Is Heroic: A perfect counterpart for Mario's red.
The Captain: The Leader, Face and namesake of Team Sonic.
Character Select Forcing: In the final showdown in Vancouver DS, you can choose only Sonic (or Mario) or both of them to take on the villains Dr. Eggman and Bowser.
Commonality Connection: Their names are in the title, and they are the team captains and champions of their respective universes, it's no-brainer Sonic would be buddies with Super Mario.
Crippling Overspecialization: Sonic's the name and speed is his game. While Sonic is unmatched in speed, his other stats aren't as great.
Depending on the Writer: Sonic is either talkative or a Heroic Mime depending on the game he's in.
Distressed Dude: In Road To Rio, while investigating Eggman's secret base with Tails, Sonic suddenly finds himself trapped inside. Jet and your Mii have to bail him out.
Friendly Rivalry: With Mario.
Gameplay and Story Integration:
- Sonic is given a lifevest for swimming events, owing to his inability to swim.
- During the Classic Diving event in Tokyo 2020, Sonic quickly jumps out of the water after completing his dive.
The Hero: He and Mario form a dynamic hero duo. Along with Tails and Luigi, they form Team Heroes in Vancouver and London. The Band of heroes set out, usually to stop the Villain Team-Up of Dr. Eggman and Bowser.
Heroic Mime: Zig-Zagged. Sonic is usually a chatterbox, but he's oddly silent in the Olympic games from Beijing to London. Averted in Rio 3DS, where Sonic has full lines of dialogue. Come Tokyo 2020, Sonic is back to talking again.
Mundane Utility: In Vancouver DS, Sonic can use springs to use his spin dash to break through barriers in order to navigate the field.
Nerf: Sonic is able to break the speed of sound while running normally, but at the Olympics, he's near-normal speed. However, he's still the fastest character in the game.
Rolling Attack: Sonic's special dash in Athletic events is his trademark Spin Dash.
Super Drowning Skills: Sonic cannot swim, so he is given a lifejacket for swimming events. Sonic just paddles along using his arms while staying afloat.
Super-Speed: He's a Speed-type character, and the fastest character in the game.
The Rival: Sonic has many rivals, Mario, Shadow, and Jet in particular are the standout ones.
Trapped in TV Land: Is captured along with Mario, Bowser, and Dr. Eggman within the Tokyo '64 game system in Tokyo 2020.
True Companions: Sonic has special victory animations with Tails, Dr. Eggman, Amy, and Mario in Sochi 2014, and Jet in Rio 2016.
Intelligible Unintelligible: Come Rio and Tokyo, Sonic dropped his Heroic Mime bit and started speaking again, and he can communicate with Mario no problem, forming a Silent Bob dynamic.
Vitriolic Best Buds: With Knuckles. Their personalities clash, but have each others backs when push comes to shove.

Tails

Sonic's two-tailed fox buddy who's very excellent with machines.

Bash Brothers: Sonic and Tails are inseparable and make quite a potent duo.
Blow You Away: Tails' special techniques have shades of this to tie into his flight ability.
Commonality Connection: Luigi and Tails are kindred spirits, being the signature sidekicks and lancers to the titular mascot characters, so they know what it's like to be overshadowed. Naturally, they wound up being a good fit for one another.
A Day in the Limelight: With Sonic and Mario trapped in the game system, Tails joins up with Luigi in Tokyo 2020 in their quest to get them out while in the Real World.
Gadgeteer Genius: His expertise with machines makes him a pretty valuable asset to the team. The first part of the plot of Tokyo 2020 is all about seeking out Tails to get him to look at the Tokyo 1964 game system.
The Hero: Alongside Mario, Luigi and Sonic, Tails rounds up the Heroes team.
Intelligible Unintelligible: Since Sonic is a Heroic Mime from Beijing to London, Tails speaks for him. He and Toad end up sharing the duties in London 3DS.
Intergenerational Friendship: Tails is shown to be good friends with Luigi, despite being eight years old and Luigi being somewhere in his twenties.
Multiple-Tailed Beast: He wouldn't be called Tails if he didn't have his two tails.
The Smart Guy: Tails is not only good with machines, but he also proves to be a pretty good detective in London 3DS' story mode.
True Companions: Tails has special victory animations with Sonic and Luigi in Sochi 2014.
Video Game Flight: Through the use of his two propeller tails. Giving him a slight edge in jumping events.
Weak, but Skilled: He's a Skill-type. His stats are more speed-focused than the other skill type characters, however, as is usually the case in his home series.

Knuckles

Hailing from Angel Island, Sonic's good buddy Knuckles goes for the gold.

Big Damn Heroes: In London 3DS, Sonic is ambushed by Bowser, but Knuckles and Vector come in the nick of time. Bowser was this close to making a blue pancake. Turns out, Amy was concerned and asked Knux and Vector to look out for Sonic.
The Big Guy: Not quite big, but Knuckles is very strong and very much proud of it.
Hot-Blooded: So much in fact he instantly calls out Bowser when he attacks Sonic in London 3DS.
Lightning Bruiser: Knuckles is one of the more faster Power-Type characters.
Muscles Are Meaningless: Don't be fooled by his skinny-looking build, the dreadlocked Echidna is super powerful.
Rapid-Fire Fisticuffs: Knuckles makes himself very useful when the gang in stuck in Polastraits by shattering the Ice Wall with his fists.
Red Is Heroic: A tad rough around the edges when it comes to his relationship with Sonic, but is overall a good guy.
Super-Strength: Knuckles is a Power-type, but is a bit more balanced than the other Power characters, having greater speed than the others.
True Companions: With Vector, Wario, and Donkey Kong in Sochi 2014.
Vitriolic Best Buds: Undoubtedly an ally of Sonic, but their personalities clash on occasion.
Your Princess Is in Another Castle!: In London 3DS, it looks like Knuckles and Vector have taken care of Bowser and have everything under control, until he was revealed to be a fog imposter the whole time.

Amy

Sonic's so-called girlfriend. Hoping to win Sonic's heart, Amy takes on the olympics.

Commonality Connection: Amy's feminine personality and penchant for love and kindness has let her develop a friendship with Princess Peach both character-wise and in a meta sense.
Damsel in Distress: In London 3DS, A morning in Hyde Park turns for the worse as Amy and Daisy are attacked by Phantasmal Fog Impostors. Peach and Blaze end up saving them.
The Heart: In London 3DS, being the youngest and less mature of the Girls group, Amy takes up this role.
Heart Beat-Down: Her special moves tend to be this.
Jack of All Stats: Amy is an All-Around type in this series. She's more skill-based than the other All-Arounders, however.
Poor Communication Kills: Peach and Amy actually had Bowser and Dr. Eggman's invitations ready, but trusted two Toads to get it to them. However, the Toads lose them. When a pissed off Doctor and Bowser arrive to get their late invitations, Peach and Amy nervously and hastily rewrite the invitations, but don't get them to Bowser and Eggman on time. The bad guys did however find the invitations they wrote to Sonic and Mario, and trusted that Peach and Amy would get them the invitations eventually and walk off to enjoy the sights. The Toads saw Bowser and Eggman with invitations on their hands (Which were actually Sonic and Mario's) as they walked away, so the girls figured they found the original invitations the Toads lost before and let the thing pass. The result? The two villains feel slighted, get ticked, and plot their revenge by unleashing the Phantasmal Fog on London, endangering the games and the populace. Oops.
Skewed Priorities: While making the London game invitations, Amy is so fixated on Sonic that she wants to give him his invitation early as well as personally. The other girls and especially Blaze don't take kindly to this, and they use an Olympic Event to settle the matter.
True Companions: With Sonic (to an extent), Blaze, and Princess Peach in Sochi 2014 and Rio 2016.
Unwitting Instigator of Doom: See Poor Communication Kills above. The girls (Peach and Amy particularly) would probably have been better served to make certainly sure Bowser and Eggman received their invitations in London 3DS.

Dr. Eggman

An evil mechanical Genius and Sonic The Hedgehog's eternal Arch-Enemy. While he too wants the gold, he'll team up with Bowser to cause trouble.

Actually a Doombot: The two villains specifically planned for such an occasion where the main characters would stop them in London 3DS, They created their own Phantasmal Fog Imposters to throw them off the trail. Eggman even installed Fog Machine holograms.
A Father to His Men: Even though his own minions are just robots, Dr. Eggman has a pretty good rapport with them, even treating Metal Sonic as a son and training him for the Olympics.
Affably Evil: The doctor is no good, but he's quite the classy fellow. You have to have have a lot of class and charm in order to win over Bowser.
Arch-Enemy: Sonic the Hedgehog's fiercest and most persistent foe. When he and Bowser join forces, they form a Arch-Enemy team to combat the dynamic duo of Sonic and Mario.
Bait-and-Switch: In Vancouver DS, once it looks like the adventure is complete by freeing the last Snow Spirit, Eggman and Bowser capture Frosty and escape to Blizland.
Big Bad Duumvirate: With Bowser.
Brains and Brawn: When they team up, he's the brains to Bowser's brawn.
Card-Carrying Villain: While his motivations vary, being the villain is basically Eggman's job.
Commonality Connection: What forges the Villainous Friendship between him and Bowser. Two bad guys with world domination aspirations, but have a pesky and persistent Arch-Enemy standing in their way. In a funny twist in this series, they quickly develop animosity for each others arch enemy.
Divide and Conquer: In Road To Rio, Eggman brainwashes the two Suit Boys to frame the heroes and create a divide between the two gyms. With Mario & Sonic out of the way, and the two gyms' increasing distrust of each other and sniping at each other's throats, he and Bowser can take over the Olympics.
Evil Is Hammy: From his villainous guffaw to his grandiose mannerisms, Eggman likes to put on a show, even when it comes to signing documents.
Evil Is Petty: Along with Bowser, Eggman hatches a scheme to use the Phantasmal Fog to endanger London when they believe they were snubbed of their invitations to the London games. Turns out, they weren't snubbed, Peach, Amy, along with some Toads, accidentally lost their invitations.
For the Evulz: The best way to explain Dr. Eggman's villainy in Vancouver DS. Why melt all the snow and kidnap the snow spirits? Why start your own Olympics? Because evil.
Gadgeteer Genius: A expert with machines of all kinds. He is responsible for the Fog Machines in London 3DS as well as the Tokyo 1964 game system.
Genius Bruiser: Eggman's a skill type, with a surprisingly good Power stat.
Go-Karting with Bowser: And he's friends with Bowser. Invoked in the ending of London 3DS. The plumber and hedgehog, right after thwarting their plans once again, don't bear a grudge against the two villains and invite him and Bowser to the olympics.
Legion of Doom: Formed with Metal Sonic, Bowser, and Bowser Jr..
Mad Scientist: Of course. He's the one responsible for the Phantasmal Fog Machines in London 2012.
Menace Decay: Much like Bowser, In Vancouver DS, Dr. Eggman's motives for his villainy was classic card-carrying evil. In London 3DS, his villainy is centered around petty revenge at a presumed slight rather than outright malice.
"Not So Different" Remark: In London 3DS, Eggman calls out an angry Wario and Waluigi on their greed, calling them no different than what he is, in some cases worse.
Eggman: You're barking up the wrong tree if you think it's our fault your plans collapsed. In fact, they'll make me a hero for chasing you crooks away.
On One Condition: In London 3DS, Eggman agrees to let Bowser Jr. challenge Metal Sonic to prove his worth. If Junior loses, he becomes Eggman's minion, if he wins, Eggman will have to tell Bowser how great an athlete his son is. With the stakes being so one-sided, Eggman easily agrees to the terms.
Shirtless Scene: In Tokyo 2020, he is now shirtless in the swimming events, only wearing swimming shorts.
Sore Loser: In Beijing 2008, when he earns a silver or bronze medal, he'll cross his arms, uttering "Unbelievable!" like coming 2nd or 3rd isn't good enough for him.
Start My Own: He'll gladly assist Bowser in the scheme to start their own Olympics (or ruin them, whichever).
Trapped in TV Land: Eggman accidentally gets himself and Bowser captured in the Tokyo 1964 game system.
True Companions: With Bowser, Sonic, and Metal Sonic in Sochi 2014. With Sonic, it's oddly more comedic than ominous.
Weak, but Skilled: He's a Skill-type. He actually has a rather high power stat compared to the other skill types, though.
With Catlike Tread: In London 3DS, he gives up an obvious clue to the heroes by signing out a Library book in big fat letters. When doing something as simple as checking out books, he wants everyone to know about it.
Villainous Friendship: He and Bowser get along quite well. Considering the two bad guys have quite a lot to relate to with each other, it was a no-brainer friendship.
Villain Team-Up: The story modes in the handheld games involve him and Bowser teaming up to cause trouble.

Shadow

The Ultimate Lifeform and one of Sonic's most enduring rivals.

The Comically Serious: Oh so much.
Dark Is Not Evil: Shadow is an anti-hero who have been more recently on Sonic's side.
Evil Counterpart: Initially started out as one for Sonic, but mellowed out a whole lot since then.
I Let You Win: He utters this when he gets 4th or lower in an event in Beijing 2008.
Kamehame Hadouken: Shadow can use his Chaos Spear to hit things from a distance. He puts it to good use to stop a roulette in Sparkleton in Vancouver DS.
Serious Business: Even in something as lighthearted and silly as the Olympics, Shadow always maintains his gruff, tough guy persona. It take up to the Rio 2016 for him to mellow out slightly and starts to smile on occasion during some of the events.
Super-Speed: A Speed-Type Character.
The Rival: To Sonic and Luigi.
True Companions: With Silver and Waluigi in Sochi 2014 (though, with a very loose definition for the latter).
Vitriolic Best Buds: He's seemingly good partners with Silver, though they don't really show the friendliness much.

Vector

A lumbering music-loving Crocodile who runs the Chaotix Detective Agency.

Big Damn Heroes: In London 3DS, Sonic is about to be ambushed by Bowser, but Knuckles and Vector come in the nick of time. Bowser was this close to making a blue pancake. Turns out, Amy initially was concerned about Sonic and asked Knux and Vector to look out for him.
Busman's Holiday: In Vancouver DS, Vector shirks his detective duties in order to participate in the Olympics, except he gets caught up in Mario And Sonic's adventure to save the Snow Spirits.
Friendly Rivalry: With Donkey Kong.
Furry Reminder: The way Vector swims in Aquatics resembles a real crocodile swimming.
Irony: He's good friends with Donkey Kong, despite not being too far off from resembling a Kremling.
Great Detective: Vector runs his own detective agency.
Never Smile at a Crocodile: Subversion. Vector is definitely big and intimidating, but he's still one of the good guys.
Stout Strength: He has tiny legs, but very impressive arms which gives him his power.
Super-Strength: As a Power-type character. Vector is generally more balanced than the other Power-Types, not standing out in any aspect.
True Companions: With Knuckles and Donkey Kong in Sochi 2014.
Your Princess Is in Another Castle!: In London 3DS, it looks like Vector and Knuckles have stopped Bowser and have the situation under control, until the Koopa King was revealed to be a fog imposter the entire time.

Blaze

The Flame Princess from the Sol Dimension jumps to another world to have some fun in the Olympics.

Cute Little Fangs: They can be seen when she smiles.
Commonality Connection: Princess Daisy takes interest in Blaze as a friend and rival when she learns that Blaze is a princess. Being Blaze however, she is hardly flattered by Daisy's forwardness.
Faux Horrific: Peach, Amy, and Daisy invite Blaze to shop and fun with them after their work is done, for someone as socially withdrawn as Blaze, however, this is the worst possible thing to happen.
Got Volunteered: The girls invite Blaze to their fun outing in London 3DS and they won't take no for an answer. The Toads even stop Blaze from leaving before she can escape.
Irony: Blaze is primarily associated with fire, yet her official artwork in Tokyo 2020 has her taking part in a swimming event.
Jack of All Stats: She's an All-Around type, meaning she has balanced stats. Her highest stat is her speed.
The Lancer: Among the Girls group in London 3DS, Blaze plays this role, while Princess Peach is The Leader.
Out-of-Character Moment: Compared to her mainstream persona, Blaze is frequently hyperactive and happy during gameplay, naturally this is most evident whenever she wins an event, where she sports a wide open grin (something almost never seen in other games).
Playing with Fire: The Mario Bros aren't the only ones with fire powers in this series. She isn't called Blaze for nothing. In Vancouver DS Blaze puts her fire powers to good use to melt an ice block puzzle, allowing her to get through without causing a potential cave-in.
Purple Is Powerful: Blaze is a princess who wields the power of fire, and a lavender-colored cat.
Red Oni, Blue Oni: She plays as a Blue to Amy and Daisy's Red.
Shrinking Violet: She may be a bit more more talkative and mellow now, but Blaze is still just as shy and socially awkward as ever. Peach, Amy, and Daisy actually force her to shop and have fun with them in London 3DS.
Technicolor Fire: Blaze's flame powers sometimes range from standard orange fire to a very snazzy purple fire.
True Companions: Has special team animations with Amy Rose, Silver and Daisy in Sochi 2014, and in Rio 2016, Rouge.

Vancouver

Silver

Tokyo 2020

^{Sochi 2014}

^{London 2012}

^{Vancouver 2010}

The mysterious being from the future with psychic powers.

Berserk Button: Do not hurt Yoshi, or else you'll end up like DK.
Defeat Means Friendship: Silver and Blaze finally join the player after their second defeat in Vancouver DS.
Flight: With his Psychic Powers, Silver is capable of hovering over distances.
Odd Friendship: With Yoshi.
Papa Wolf: Do anything to hurt Yoshi, and Silver will make you pay. DK finds this out the hard way in the intro to Tokyo 2020.
Psychic Powers: He has been using them to levitate in poses. He proves beneficial to the group many times. In Vancouver DS, he helps Donkey Kong retrieve his lost bunch of bananas from a crevasse in Icepeak.
Recurring Boss: In Vancouver DS, Silver initially turns down the offer to join the heroes, only changing his mind after defeating him again.
True Companions: With Blaze, Shadow, and Yoshi in Sochi 2014.
Vitriolic Best Buds: With Shadow.
Weak, but Skilled: As you might expect from a being with Psychic Powers. He's a Skill-type in this series, meaning he lacks power, but makes up for in technique.
We Will Meet Again: Silver and Blaze get this in Vancouver DS only joining the player for good after being defeated in the second encounter.

Metal Sonic

A cold, wicked robot created by Dr. Eggman for the sole purpose of matching and destroying Sonic. Whichever is good.

Boss Battle: The gang has to face him with a group of Egg Pawns in Tokyo 2020 at the Metropolitan building. He also plays the role of a boss in Vancouver DS in the Dream Long Jump.
The Dragon: To Eggman's empire.
Evil Knockoff: Evil Robot Knockoff in this case.
Felony Misdemeanor: In London 3DS, Metal Sonic breaks Waluigi's invention, prompting the angry plumber to come after him.
Flight: He's armed with rocket thrusters that allow him to do this.
Legion of Doom: After Bowser, Eggman, and Bowser Jr., Metal rounds out the group.
Odd Friendship: With Bowser Jr. Reptilian Koopa child? Evil Robot who doesn't even talk? They're good friends.
Shock and Awe: A lot of Metal's special moves use this.
Super-Speed: Since he was designed to match Sonic, he has this in spades. He's a Speed-Type character.
The Unintelligible: In lieu of a proper voice, he emits electronic jabbering and warbling sounds.
True Companions: With Eggman and Bowser Jr. in Sochi 2014.
Villainous Friendship: With Bowser Jr. Apparently evil princes and evil robots can relate to each other quite well.
Villain Team-Up: Metal and Bowser Jr. form one at the end of Vancouver DS, after being left out of the main plot.
The Voiceless: He doesn't speak, except for unintelligible robot noises. In London Wii's London Party mode, Orbot and Cubot talk for him.

Rio

Rouge

A seductive, sassy bat girl who was once one of the rival characters, but takes part in the Olympics for real in Rio 2016.

Anti-Hero: She's not a bad girl overall and will assist the good guys, but her Greed does gets the best of her on many occasions and the heroes often have to battle her regardless.
Beat the Curse Out of Him: in London 3DS, Rouge is brainwashed and under the influence of the Phantasmal Fog. It takes Princess Peach beating her in a duel to snap her out of it.
Brainwashed and Crazy: Rouge is this under the influence of the Phantasmal Fog in London 3DS.
Flight: She's a bat. What do you expect?
Giant Space Flea from Nowhere: She randomly appears at the end of Legends Showdown as one of the three final rivals.
Greed: The main reason why Rouge is so easily talked into switching sides. Anything to get her hands on some wonderful treasure.
Heel–Face Revolving Door: Many examples.
- In Vancouver DS, Shadow talks her into helping the good guys recover the stolen Olympics Memorabilia, which she agrees to on the condition of offering her whitestones. However, later on in Icepeak, Bowser and Dr. Eggman get her to turn on the group by offering her a Whitestone reward of their own if she beats the player in a Figure Skating Duel. Once Rouge loses, Eggman and Bowser have no intention of honoring their part of the bargain. Being used, Rouge turns once again. The Revolving finally stops by then, however, and Rouge remains a face, even apologizing afterwards.
- In London 3DS, Rouge is once again set up as a villain, but she's actually brainwashed. Once Princess Peach breaks the influence over her, she agrees to hang out with the girls.
- However, Rouge then teams up with Eggman Nega and Dry Bowser to steal the legends Trophy in Sochi 2014.
Kill and Replace: Rouge (brainwashed) threatens to do this to the Girls in London 3DS. Her scheme is to trap them in the fog of Hyde Park, while their Phantasmal Fog copies replace them in the games.
Mind Manipulation: An unfortunate victim of the Phantasmal Fog's influence in London 3DS.
Money Fetish: Gives Wario a run for his money literally and figuratively in terms of liking money and treasure.
Ms. Fanservice: Being Rouge, this was a given.
My God, What Have I Done?: Rouge feels remarkably guilty after being duped over some Whitestones by Bowser in Dr. Eggman in Vancouver DS.
Promoted to Playable: After being a rival, Rouge competes in Rio 2016.
The Smurfette Principle: She's the only female rival character. Or rather was.
Token Good Teammate: Out of all the rivals in the first four games, Rouge is probably the friendliest and most likely to assist the heroes.
True Companions: Has a special team animation with Blaze in Rio 2016 's Wii U version.
Villain Team-Up: Teams up with Eggman Nega and Dry Bowser, of all people, to steal the trophy in Legends Showdown.

Cream

Tokyo 2020

A little rabbit girl with a Chao named Cheese who always tags at her side. She teams up with Toad to handle the host and ref duties for the Olympics. She becomes playable in the 3DS version of Rio.

Cheerful Child: Cream is very friendly and rather cheerful, as she continually bobs up and down even when she's standing.
Damsel in Distress: In London 3DS, Cream and Cheese are attacked by Phantasmal Fog Impostors mimicking the heroes in the main stadium. Thankfully, The real heroes arrive to rescue them in time.
Demoted to Extra: In the first three games, Cream was a prominent referee, acting as a host for the games alongside Toad, and even became playable in "Rio 3DS". However, in "Rio Wii U", Cream is running the "Item Stand: Sonic Edition" in the game's Hub World instead of acting as referee/host or being a playable character. The same also applies to '"Tokyo 2020'' as well.
The Host: For Vancouver's Festival Mode, and London Party. Generally, when Cream isn't refereeing or running item stands, you'll see her doing this.
It May Help You on Your Quest: In Vancouver DS, Cream is stuck with a locked chest and can't get it open. Luckily Knuckles helps her out and the player is able to obtain a Hockey Stick, which lets Mario & Crew play Hockey Events.
Japanese Politeness: Being Cream, she can't resist calling others Mr. or Ms.
Modesty Shorts: Is given a little pair of black shorts under her dress for her playable appearance in Rio.
Promoted to Playable: She was a referee/host from Beijing to Sochi. Now she joins the fold in Rio 3DS, but goes back to referee duties in the Wii U version and Tokyo 2020.
Video Game Flight: She uses her rabbit ears to float and hover, as she proudly demonstrates on the trophy stand in Rio 3DS.

E-123 Omega

One of Dr. Eggman's robots. The last of his famous E-Series Line.

Anti-Hero: He opposes Dr. Eggman out of principle, so he'll help the team out in stopping his plans but mostly operates out of his own self interest too much to be a real ally.
Brainwashed and Crazy: In London 3DS, Dr. Eggman installed a part in him that causes him to go nuts, and he attacks Donkey Kong during his breaks.
Bullying a Dragon: Omega in his rampage attacks Donkey Kong and ruins his banana. Curb-Stomp Battle in Wrestling ensues.
Heel–Face Revolving Door: Omega constantly fluctuates between ally and enemy to the heroes.
Promoted to Playable: Becomes a playable character in Rio 3DS.
Put on a Bus: Is no longer playable and absent in the Wii U version of Rio 2016 and Tokyo 2020.
Robo Speak: Of course.
Skewed Priorities: Being Omega, his main focus and only focus is on the destruction of Dr. Eggman. In Vancouver DS, Eggman even takes advantage of this by goading Omega into a condition that he can only face him if he defeats Sonic and Mario.
Stock Sound Effect: All of his spoken dialogue in the Rio 3DS is taken from Sonic Heroes.
Took a Level in Kindness: In Vancouver DS, he wants to destroy Dr. Eggman and is easily manipulated into battling the heroes. London 3DS has him accompanying Mario, Sonic, Luigi, Tails and Toad after being asked to by Donkey Kong and turns back at Stonehenge due to Toad being unwell and later reports on the clearing of the fog. Rio 3DS has him helping Sonic and his friends from the start.

Espio

The chameleon ninja member of the Chaotix Detective Agency.

Non-Action Guy: Accompanies the heroes initially during the investigation in London 3DS.
Promoted to Playable: He was a referee in the previous games, but becomes playable in Rio.

Jet

The cocky leader of the Babylon Rogues from the Sonic Riders series.

All Up to You: In Road To Rio, It falls upon Jet (and your character) to rescue Sonic the Hedgehog, who is trapped inside Dr. Eggman's base. Jet plays an unlikely hero and puts his lock-picking skills to good use to bust him out.
Character Select Forcing: He can only be challenged by playing as Sonic in Vancouver DS.
Hidden Depths: His profile in Rio 2016 states that he has an interest in ball sports such as soccer due to the pace and technical skill required.
Promoted to Playable: Like Rouge and Dry Bones, Jet is a former rival competing in Rio.
The Rival: Even though they're not on airboards this time, Jet still views himself as one to Sonic.

Eggman Nega

Dr. Eggman's strange descendant.

Ascended Extra: While still only a guest, Eggman Nega plays the main Sonic villain in Tokyo 2020 (possibly due to Metal's inability to speak).
Arc Welding: In London 3DS and Tokyo 2020, it's confirmed that he is Eggman's descendant from the future, which is established in Sonic Rivals, however Tails' dialogue after he mentions it in the former has him saying that also mentions about how Sonic and Blaze stopped him, which references his debut Sonic Rush, where he is said to be Eggman's Alternate Self. This has been established by Iuzuka, but this is the first game to mention so.
Evil Counterpart: Dr. Eggman is a bad dude himself, but Eggman Nega is what he would be if the doctor didn't have any semblance of standards or restraint.
Faux Affably Evil: He puts a pretty nice facade to hide his real evil and sociopathy.
Foil: To Bowser Jr. While also a descendant, he is from a far further era of time. Unlike Bowser Jr., he shows no respect for his ancestor Eggman, calling him an embarrassment and being far less resourceful. He is also far older than Jr. and his Never My Fault moments are usually blamed on Eggman.
Generation Xerox: He looks exactly like his predecessor with slightly different colors and different design of his jacket.
Go-Karting with Bowser: A notorious creep of a villain who was Blaze the Cat's Arch-Enemy before becoming Silver's, then became a standard rival in the Olympics, now he's in on the fun for good this time.
I Lied: In London 3DS, Eggman Nega has no intention of living up to his bargain when the heroes defeat him, pulling a Villain: Exit, Stage Left.
Overlord Jr.: Exaggerated. He's a descendent of Dr. Eggman, though from a very far future.
Promoted to Playable: He becomes a playable character in Rio.
Put on a Bus: Is no longer playable and absent from the Wii U version of Rio 2016. A particularly odd example as, aside from the first, he's appeared in every game so far including Rio 3DS.
- The Bus Came Back: He returns in Tokyo 2020 and also has a major role in the storyline.
Stock Sound Effect: Speaks entirely in recycled voice clips from Chikao Ōtsuka in the Japanese versions of Rio 3DS and Tokyo 2020.
Took a Level in Kindness: In Tokyo 2020 he doesn't do anything terribly bad outside of coding in power-ups with the intention of giving Bowser and Eggman the means to cheat. Aside from that, he's totally helpful, if arrogant (which is no surprise considering his personality and who he's a descendent of). Additionally, like in Rivals, he holds embarrassment for being a descendant of Dr. Eggman, but is willing to help save his ancestor.
Villainous Breakdown: In Vancouver DS, after being defeated once again in Polastraits, Eggman Nega's nice façade evaporates and he dumps the cage containing the Snow Spirit Cuby into the water, attempting to drown him.
Your Princess Is in Another Castle!: Just when the characters are about to claim the Legends trophy in Sochi 2014, Eggman Nega, along with Dry Bowser and Rouge the Bat, ambush them and take the trophy, forcing the character to beat them in the Winter Sports Champion race.

Zavok

Zavok is the strongest of the sinister Zeti and leader of the Deadly Six. As the last disciple of Master Zik, he's a certified force to be reckoned with. His greatest joy is in improving his skills, which makes the straight-forward competitive nature of the Olympic Games quite appealing.

Challenge Seeker: His reason for taking part in the Olympic Games.
Go-Karting with Bowser: Zavok and the other Zeti betrayed Dr. Eggman and have gone so far to try to destroy Sonic's world before. All water under the bridge now, as Zavok plays right along with Sonic and the others in the Olympics.
Graceful Loser: He shows bewilderment if you beat him in the 3DS version, but it quickly gets replaced with excitement at having a Worthy Opponent to face to further test his skills.
The Rival: The intro to the Wii U version of Rio 2016 shows him having a boxing match against Bowser.
Villains Out Shopping: He's got no evil intentions; he just came to the Olympics to test his skills.

Zazz

The wild and crazy member of the Deadly Six, Zazz is every bit the metalhead he looks like. His competitive style is a bit chaotic than is usually seen in the Olympic Games.

Go-Karting with Bowser: A member of the villainous and omnicidal Deadly Six, Zazz is able to compete in the Olympics alongside Sonic's crew.

Wave

From Sonic Riders. The expert mechanic member of the Babylon Rogues, Wave the Swallow joins Jet in the Olympics.

The Bus Came Back: After Sonic Free Riders, Wave all but disappeared from the scene, until finally reappearing in Rio 2016
Put on a Bus: Wave is one of the Rio 2016 newcomers who got the boot from Tokyo 2020.

Sticks

From the Sonic Boom universe, Sticks the Badger goes for the gold.

Art Shift: Her proportions here are more in line with those of the Modern Sonic characters.
Canon Foreigner: Unlike the other members of Team Sonic, she's not from the main series, but instead from an alternate continuity.
Modesty Shorts: Sports a pair of black shorts under her skirt.
Put on a Bus: Does not return for Tokyo 2020.

Other Athletes

Mii

Customizable avatars that have been appearing on Nintendo platforms since the Wii. They are playable in here, and are given a great deal of importance in Rio 3DS's story mode, "Road to Rio".

The Ace: Your Mii becomes one by the end of both of Road to Rio's routes.
Character Customization
Digital Avatar: You can use your Mii to participate in the Olympics.
Put on a Bus: Are absent in Tokyo 2020 despite the Switch being compatible with Miis.

Unplayable

Referees

Lakitu

The famed four-eyed Koopa in a cloud has moved away from the track and takes up the ref duties in the Olympics.

My Master, Right or Wrong: Even though is an olympic referee, Lakitu remains loyal to Bowser, even if he trying to ruin the olympic games in London 3DS.

Charmy

The third member of the Chaotix Detective Agency. This little bee guy makes himself busy.

Ascended Extra: Alongside Espio, he temporarily joins the Heroes in London 3DS, as they split up into teams to solve the mystery of the Phantasmal Fog.
Intelligible Unintelligible: Due to Toad and Tails split off on their own teams, Charmy teams up with Luigi.
Trust Password: Charmy is in charge of a locked gate in Cubyrinth in Vancouver DS under command of Vector, and he won't open the gate until you tell him the "password". The "password" is actually a quiz Vector has to solve.
Video Game Flight: He's a bee, and stays aloft consistently.
Virtuous Bees: A young and friendly bee child and also the youngest of the Chaotix group.

Orbot And Cubot

Eggman's two robot lackeys. Orbot is the smart one and Cubot is the dumb one.

Rivals

King Boo

The Big Boss of the Boos. He is one of the rivals, but also plays as a flunky minion for Bowser in the story modes.

Character Select Forcing: He singles out Luigi for one of his challenges in Vancouver DS.
Go-Karting with Bowser: A nasty ghost king and Luigi's Arch-Enemy in the Luigi's Mansion games, He's mostly taken a break from stuffing people into portraits and is okay with just competing in the Olympics.
Flunky Boss: Is the main villain of the Luigi's Mansion titles, but is just a minion of Bowser in the Olympics games.
Ghastly Ghost: He's not as terrible as he is usually, but he's still a bad guy, usually aiding Bowser in his schemes in the Olympics.
King Mook: As his name implies, King Boo is the leader of the Boos.
Large and in Charge: He's the king of the Boos, so it only makes sense that he's larger.
Right Behind Me: In London 3DS. King Boo is chatting it up with his Boo minion about Bowser and Eggman's plan, completely unaware that the minion has attracted the attention of Sonic and Tails, who has followed them, and is hearing everything they're saying. King Boo is completely unaware of this until the minion points them out, but by then, it's too late.

Big Bullet Bill

An unusually large Bullet Bill.

Demoted to Extra: He's one of the main bosses in Vancouver DS and holds a Snow Spirit Captive. In London 3DS, he just helps Bowser Jr. pull a Villain: Exit, Stage Left.
Original Generation: Big Bullet Bill is the only Mario rival in this series to not make a real debut in a Mario game. There actually are larger versions of Bullet Bills in Mario games, like Banzai Bills and King Bills, but Big Bullet Bill was specifically made for this series.
Put on a Bus: The last game Big Bullet Bill appeared in was London 3DS. It did not appear in Sochi, Rio, or Tokyo.

Original Characters

The Snow Spirits

Frosty, Sparky, Pola, Cuby, Icy, and Blizza, the Snow Spirits are a team of six characters in Vancouver DS' Adventure Tours. They're the controllers of snow in the region, so Bowser and Dr. Eggman kidnap them to abuse their powers. Of course, the duo of Mascot heroes set out to free them and make things right again.

An Ice Person: They have the power to control snow.
Batman Gambit: Blizza pulls a pretty good one on Dry Bowser, who has Frosty captive. She taunts him into accepting a match. While Dry Bowser is distracted, Blizza sneaks to go free Frosty from his cage.
Big Eater: Cuby is heavily implied to be this.
Color-Coded Characters: The Snow Spirits are all based on different snowflake designs, but the best way to tell them apart is their color. Frosty is blue, Sparky is pink, Pola is Cyan, Cuby is yellow, Icy is green, and Blizza is purple.
Egopolis: Each Snow Spirit is named after the region they're responsible for.
Expy: They serves as one for the Star Spirits.
Four-Temperament Ensemble: Frosty is leukine, Sparky is sanguine, Pola and Cuby are phlegmatic, Icy is melancholic, and Blizza is choleric.
Fun Personified: Sparky is energetic and just wants others to have a good time, to a fault, as he never takes things seriously.
The Ingenue: Pola is very soft spoken and gentle.
The Eeyore: Icy... is not a very confident or optimistic guy.
The Lancer: Blizza. After Frosty is put out of commission in the final chapter of Adventure Tours, Blizza takes the lead and guides the group through Blizland. She even takes it upon herself to free Frosty from his cage.
The Leader: Frosty. In fact, he's the only one who escapes Bowser and Eggman's initial kidnap attempt. Of all the Snow Spirits, he has the most leadership qualities.
Original Generation: The first real original characters created for this series.
Plucky Girl: Blizza the purple snow spirit, is very brave and aggressive and never backs down from anyone.
Tomboy and Girly Girl: Blizza and Pola, respectively.
Two Girls to a Team: Again, Blizza and Pola.
Weather Manipulation: The spirits have the ability to create snow, which the bad guys use to their advantage.
Your Princess Is in Another Castle!: In Vancouver DS, once the heroes defeat Rouge the Bat in Icepeak and seemingly free Blizza, the last snow spirit, Dr. Eggman and Bowser use the distraction to kidnap Frosty. Forcing the mascot heroes and their friends to track them down to Blizland.

The Phantasmal Fog

A mysterious colored fog that is the main part of the story in London 2012 3DS, Dr. Eggman and Bowser use it's power to exact revenge on the characters for being left out of the London Olympics.

Artifact of Doom: The Fog is sealed within a magical urn.
Eldritch Abomination: No one knows of the Fog's real origin or its true form. It only takes the form of the character one thinks about.
Evil Knockoff: The fog can create exact duplicates of characters, but not their personalities. The fog duplicates are always evil and aggressive.
Fog of Doom: Aside from limiting visibility as fog usually does and generally being ominous, the Phantasmal Fog can create evil clones of characters, suffocate characters, mind control characters, and even increase the power of certain characters.
Mind Manipulation: The Fog can warp the minds of characters, as poor Rouge found out.
Mind Probe: The Phantasmal Fog can read minds, and take the form of that person's thoughts.
Our Ghosts Are Different: The Fog Imposters. They disappear once defeated.
Sealed Evil in a Can: The Phantasmal Fog once ran rampant across Europe, until it was sealed within an urn.
Would Hit a Girl: Phantasmal Fog imposter have no issues at all with attacking females relentlessly. Princess Daisy, Amy Rose, and Cream The Rabbit can definitely attest to that.
Would Hurt a Child: The Phantasmal Fog spares no one, as it sends Fog Imposters to attack the very innocent Cream the Rabbit and Cheese.

The Suit Boys

In Rio 2016's Road to Rio Story mode, the Suit Boys are two Miis wearing Mario and Sonic Suits. They look like average NPCs, but perhaps there is more to them than is being let on...

Apple of Discord: They were brainwashed by Dr. Eggman to be two bad apples to cause trouble, distract Sonic & Mario, and create a divide between both the friendly Mario And Sonic gyms.
Brainwashed and Crazy: They seem to be evil pawns of the villains, until Sonic discovers this to be the truth about them.
Fanboy: They are hardcore fanboys of whichever mascot they "represent", and for the most part, don't like each other much.
Sore Loser: Both of them tend to display poor sportsmanship.
Unwitting Pawn: For whatever reason, they were taken in by the two villains and brainwashed to do their bidding for their master plan.
Younger Than They Look: Even though all the Mii-based NPCs are all the same size, the Suit Boys are implied to only be children.

VIPs and Other NPCs

Shy Guys

They're Little guys who wear robes and masks that hide their face (Or their mask is their face, we don't know).

All There in the Manual: Shy Guy Adventure Logs in Vancouver tell the story of how the Shy Guys actually got there.
Bystander Syndrome: In London 3DS, while Cream and Cheese are being attacked by Fog imposters, two bystander Shy Guys get spooked and run away.
Friendly Enemy: Like in the home series, Shy Guys are mostly harmless pranksters who just do whatever they want, or just whatever others tell them to do.
Knights and Knaves: In Vancouver DS, Two Yellow Shy Guy twins in Cubyrinth are this. One always lies and the other always tells the truth.
Lovable Coward: Shy Guys are notoriously cowardly.
Made a Slave: In Vancouver DS, They were tricked by the villains to becoming this, now they await someone to save them.
Multi-Mook Melee: Tails faces off against a legion of Shy Guys in Treehouse Rumble, where he has to beat up a bunch of them within the time limit.
Mythology Gag: Pink-robed Shy Guys appear in Tokyo 2020 during the Treehouse Rumble minigame. A call back to their very first appearance in the NES version of Super Mario Bros. 2.
Unwitting Pawn: Promised a utopia, the Shy Guys and Chao were duped by Dr. Eggman and Bowser into building their Evil Lair in Blizland. They could leave anytime they want, but the lair provides shelter from the storm, effectively trapping them there.

Chao

Tiny creatures that can take many different forms.

All There in the Manual: The Adventure Logs tell the sad tale of how the Chao got there.
Dark Is Not Evil: Dark Chao are not evil. They're more like jerks.
Jerkass: Dark Chao aren't evil, per se, but they definitely are abrasive.
Made a Slave: In Vancouver DS, The Chao didn't think much of their benefactors Bowser and Dr. Eggman, but they were cold and needed a roof over their heads from the harsh Winter storms. Now they wish someone to save them.
Nice Guy: Hero Chao are this compared to their Dark counterparts.
Ridiculously Cute Critter: Little blue bulbus creatures with little fluffy wings who float around.
Toxic Friend Influence: In Vancouver DS, trying to imitate Penguin results in Chao and Shyguy almost getting themselves in trouble by sliding around on Ice dangerously. The heroes have to save them from falling through the ice.
Unwitting Pawn: In Vancouver DS, The poor Chao were duped by the villains into building their Evil Lair in Blizland. They could escape, but accept their new "home" because it provides shelter from the storm. Now they await someone to save them.

Toads

The main denizens of the Mushroom Kingdom, who have mushroom like heads and come in many different colors.

Adaptational Wimp: Yellow Toad and Blue Toad, who previously accompanied Mario and Luigi on a few dangerous adventures, aren't quite as effective here. They even lose the invitations the girls write for Eggman and Bowser.
Color-Coded for Your Convenience: Mainly to differentiate themselves from the main Toad (Red spots and Blue Vest), who accompanies the heroes on the adventure. The Toads who accompany the Girls in London 3DS are the mono-colored ones.
"Eureka!" Moment: Purple Toad has one of these when he remembers seeing a "White Bat" in the fog, setting the Girls on the trail to their next clue.
Lovable Coward: When Peach and Blaze are attacked by Phantasmal Fog Imposters, they aren't particularly... helpful.
Unwitting Instigator of Doom: Yellow And Blue Toad are entrusted Dr. Eggman and Bowser's invitations, but they lose them, causing Amy and Peach to hastily re-write them.

Penguins

From Super Mario 64, Penguins who have learned how to walk and talk.

Ascended Extra: Penguins normally don't get much attention outside of a few sparse appearances in the main series, but the Olympics series gives them greater prominence.
Racing Minigame: In Vancouver DS, One Penguin in Polastraits who is a big fan of Sonic challenges him to a race.

Egg Pawns/Badniks

Dr. Eggman's rank-and-file robots.

Boom Booms

Characters / Mario and Sonic at the Olympic Games

Athletes

Team Mario

Beijing

Vancouver

Rio

Team Sonic

Beijing

Vancouver

Rio

Other Athletes

Unplayable

Referees

Rivals

Original Characters

VIPs and Other NPCs

Cameos

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Index

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Characters / Mario and Sonic at the Olympic Games

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Athletes

Team Mario

Beijing

Vancouver

Rio

Team Sonic

Beijing

Vancouver

Rio

Other Athletes

Unplayable

Referees

Rivals

Original Characters

VIPs and Other NPCs

Cameos

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Index

Next