The resident Smart Guy or Girl in Western Animation television series.
- Jimmy Neutron in The Adventures of Jimmy Neutron, Boy Genius. Who somehow can—among other things—give life to pants, transport himself into dreams, create a time machine, and build an intergalactic messenger out of a toaster.
- Avatar franchise:
- Sokka from Avatar: The Last Airbender doubles as a Badass Bookworm as he accumulates Character Development. He also averts the 'no romance' part of the trope; throughout the series, he's had two girlfriends (Yue and Suki), Ty Lee flirts with him on a few occasions, and Toph secretly harbors a crush on him. Sokka also manages to be both the smart guy and the plucky comic relief.
- The Legend of Korra has Mako (who doubles as The Lancer) as the Street Smart and strategic one, and Asami Sato as a Gadgeteer Genius who can fix, drive or fly seemingly anything. Together, they're the ones who are the brains of Korra's team.
- As in the comics, The Avengers: Earth's Mightiest Heroes has Iron Man and Ant-Man, who are geniuses in different fields. Bruce Banner would also count, though he's not around as often as his alter-ego.
- Shy-but-sensible Austin of The Backyardigans, both in and out of character. Uniqua also tends to play scientific types, while more excitable Pablo is usually used to play with the concept.
- Nonny from Bubble Guppies is smaller than the rest of the characters and wears goggles, and is notably shy and withdrawn for a character on a preschooler's show.
- Captain Simian and the Space Monkeys has a unique example: Dr. Splitz/Splitzy suffers from a Split Personality disorder, and both of them are very intelligent and innovative in their own right. Dr. Splitz is a textbook example — he is the ship's engineer and sometime medic, and has the true heart of a scientist. Splitzy is a Genius Ditz who is extremely skilled in mechanics and acts as translator for Dr.Splitz's Sesquipedalian Loquaciousness. Working together in combat, they make a Badass Bookworm.
- Sypha Belnades in Castlevania overlapping with The Heart and team mage, she's extremely book smart and figures out how to control Dracula's castle. Alucard is almost as smart as Sypha being very well read making a him a Genius Bruiser, both Sypha and Alucard make Trevor Belmont look like Dumb Muscle in comparison despite his leadership skills.
- Dotty, Pepper's cute little sister on Clue Club. She's a computer whiz (for 1976) and has science and forensic moxie. At age 13.
- Code Lyoko has Jèrèmie Belpois, the only one who knows how to properly use the Supercomputer and the team's Non-Action Guy. He is also The Leader.
- Numbuh Two in Codename: Kids Next Door. He is the one creating and repairing most of the tools and weapons the team uses in their missions. His official title is even "2x4 Technology Officer of Sector V."
- Both Tucker and Jazz in Danny Phantom. While both have extremely high intellect, Tucker is shown to be slightly brighter, though very immature.
- The titular scientist in Dexter's Laboratory. He is stated to be a small child, yet can build a vast laboratory inside a suburban house, and he can build huge robots and experiments to alter his own body (but cannot keep his sister from disturbing him.)
- Callum from The Dragon Prince is the smartest in the group. He makes most of the plans when it comes to strategic action.
- Fishlegs Ingerman in Dragons: Riders of Berk is the resident expert in dragons, the viking equivalent of a zoologyst and seems to have memorize the Great Big Book of Everything about dragons.
- Dewey takes on this role in DuckTales (1987) and Quack Pack , he frequently makes up the ideas to get them out of trouble.
- Huey Duck takes on this role in DuckTales (2017) as the smart one of the three brothers, as he's frequently an overachiever, making plans, doing research, and constantly consulting his Junior Woodchuck Guidebook.
- Edd ("Double D") from Ed, Edd n Eddy is highly intelligent, he loves to use "big words", and the other characters will often see him as an Insufferable Genius. But he also shows a lot of common sense, even if he can't understand that other people maybe aren't as interested in reading books and getting knowledge as he is.
- Teebo from Ewoks is this throughout the first season, though he has moments in the second season as well. He listens to the trees, talks to animals, provides solutions to problems the gang is having and forms a closer bond with Logray, the village shaman.
- Ingrid from Fillmore! is the smartest girl in school which is helped by her having a Photographic Memory. She has some nerdy aspects, like owning an Abe Lincoln lunchbox, but it's not played up much.
- In Futurama super-tech is so common that the Smart Guy is actually the only character capable of running the Planet Express delivery company, in the form of Hermes Conrad, a Level 34 beauraucrat and the team's Only Sane Man. Professor Farnsworth also counts, though more in a Genius Ditz / Reluctant Mad Scientist sort of way.
- In Gargoyles, Lexington is a unique version due to being a Fish out of Temporal Water from the Dark Ages. Upon awakening in the present, he becomes fascinated with modern day machines, leading him to study them and adapting more to the twentieth century than the other gargoyles.
- Go Go Gophers: Ruffled Feather is this, as he often finds out the coyotes' plans and easily comes up with ideas to thwart them. Don't let his unintelligible speech fool you.
- Dipper Pines in Gravity Falls, along with a Badass Bookworm. Ford is this as well.
- Kin Kujira of Grojband is the band's resident nerd and Gadgeteer Genius, who develops crazy (and often dangerous) inventions to help Corey with his Zany Schemes while also giving exposition in the form of "Rock Lore".
- Jingaroo had Humpty Doo, the outback's resident genius who usually has ideas on how to solve problems.
- Gilbert in The Jungle Bunch. One of his favourite pastimes is conducting scientific experiments.
- Mr. Cat from Kaeloo is the only actual smart character on the show, the other "smart" characters being Ditzy Geniuses. He's a pretty good inventor and a Mad Scientist, and he constantly comes up with schemes to trick other people. He averts the "weak" part though as he's actually a very good athlete.
- Wade Load of Kim Possible, a 10-year-old super genius who invents all of Kim's gadgets. Oh, and, he's voiced by Taj Mowry, who also played the titular character of a TV show of the TropeName.
- Buckwheat on The Little Rascals is a Gadgeteer Genius, in one of several departures from the Our Gang theatrical shorts.
- L in Men in Black: The Series is the team's scientist, medic and forensic investigator all in one.
- Pickles the Drummer, of Metalocalypse, although compared to his bandmates that isn't saying much. Although all of the bandmates have at least one area of expertise despite being catastrophically stupid otherwise, Pickles is implied to be very intelligent: he can play several instruments (and started a highly successful glam rock band as a teenager), understand complex mathematics well enough to explain them to Nathan, read and write music, and seems to have graduated college despite champion-level alcoholism. He might even be a genius, except that because of his implied-to-be-supernatural tolerance, he takes drugs the way other people eat potato chips, and his miserable childhood left him with a level of emotional immaturity that generally puts him on par with the rest of Dethklok.
- Tanya of Mighty Ducks: The Animated Series is the resident Gadgeteer Genius and overall tech expert, although she's no weakling on the battlefield or the hockey rink. She tends to stutter and lisp a bit, since her brain is moving faster than she can speak.
- Rath of Mummies Alive! is the smartest one of the titular mummies, being skilled at using different kinds of magic, similar to Scarab, though he can be arrogant at times.
- Twilight Sparkle takes the role in My Little Pony: Friendship Is Magic, though it's subverted more often than not due to her lack of real world experience. She's certainly capable of some Awesomeness by Analysis however, along with some hardcore exposition.
- Her Evil Counterpart, Sunset Shimmer, is only implied to also be one in My Little Pony: Equestria Girls, with her being Twilight's predecessor as Princess Celestia's student and her rubbing that fact in Twilight's face. Her status as this is only made apparent after her redemption in the first movie, and she's shown to be more of a hands-on learner. Her expertise in magic is also emphasized in order to contrast with the science-focused Gadgeteer Genius that is the human world's native Twilight.
- Gus from The Owl House is this to the Hexsquad. He's repeatedly described as a Child Prodigy due to his incredible affinity for illusion magic, and while Hunter is generally more book-smart, Gus has an incredible eye for detail and performs Awesomeness by Analysis constantly. Due to being moved up a few grades, he's the youngest of his friend group at 12 years old (Luz, Amity and Willow are 14, Hunter is 16), and because his illusions are intangible, he mostly focuses on distracting or confusing the enemy (i.e. creating illusory duplicates of himself and his friends, casting darkness across the battlefield, making the enemy relive their most traumatic memories) while his friends do the heavy hitting.
- In The Penguins of Madagascar, Kowalski is both The Lancer to Skipper, and the smart guy. While not short, he is notably the slimmest of all the penguins, and their Technical Pacifist. He's notably the Mad Scientist and Gadgeteer Genius types.
- Blossom and Professor Utonium on The Powerpuff Girls both show some moxie in the intelligence department, but they will often get Flanderized (Blossom as egocentric, the Professor as a haplessly overconcerned parent) to keep them from being too one-dimensional.
- Sean from Ready Jet Go!, who is a Child Prodigy and the smartest one of the group, sometimes acting as the Voice of Reason.
- Egon Spengler in The Real Ghostbusters: All the characters are very intelligent, after all, they are all scientists,note but Egon is so intelligent that he makes the other characters look dumb in comparison. In the Sequel Series Extreme Ghostbusters the role lands in Roland.
- Gretchen Grundler of the Recess gang, she does not make the plans, but is the one checking the numbers to see if they are feasible, and create the gadgets to put it in motion.
- Sam Dullard of Rocket Power is a huge computer whiz and uses that knowledge to help the others improve their sports skills every once in a while. He has also skipped a grade.
- Velma Dinkley in Scooby-Doo, who is the one that check the clues and actually identifies who the villain is before everyone else.
- Kelly Hamdon in SheZow, as she knows everything related to SheZow.
- Kyle Broflovski from South Park often gets this role when compared with the others boys, and even Matt and Trey have called him the group's "smart kid".
- Mr. Hal Gibson from Super Robot Monkey Team Hyperforce Go!. He's the team's resident scientist and genius.
- Tako, the unofficial leader of the Sushi Pack, is the one usually called on to think of a plan to defeat the bad guys, and even has a standard "thinking routine". He also offers explanations of more complicated terms that come up in the show.
- Wildcat in TaleSpin is an exceptionally good mechanic and plane engineer, albeit a little crazy. Some could say that Rebecca is also the "Smart Girl" of the show as she's the more grounded, but at the same time some of her Get-Rich-Quick Scheme do not work.
- In Teenage Mutant Ninja Turtles (2003), Donatello's intelligence rises sharply to the point where he can build just about anything within a day or two (it seems to vary on how soon the team needs it), and figures out how to adapt Utrom tech, along with almost all other alien technology. He's also the guy with the staff, and generally considered the Technical Pacifist.
- Teen Titans (2003)':
- Cyborg is a Genius Bruiser, and normally can work out with machinery to help out during fights.
- Raven has elements of this, too, despite primarily being The Lancer. Of course, Cyborg also sometimes fills the role of The Lancer despite primarily being The Smart Guy, so it all evens out.
- Robin, being The Strategist and Batman's apprentice, can fill this role as well, especially when assessing new threats or being Mr. Exposition.
- In The Tick, the comics, animated and live-action series, the Tick's moth-garbed sidekick, Arthur, fills the role of the Smart Guy.
- In The Transformers, Wheeljack and Ratchet shared this role in the first season, Perceptor joined in as a third Smart Guy in the second season, and the third season saw Perceptor become the sole Smart Guy after Wheeljack and Ratchet's deaths in The Movie. The fourth "season" (really just a few episodes) introduced Brainstorm for this role, but the show ended before much could be done with him.
- In Transformers: Beast Wars, Dinobot The Lancer was a Proud Warrior Race Guy with little respect for trickery. Rhinox The Big Guy was a Genius Bruiser who dealt with equipment as a Mr. Fixit. Rattrap The Smart Guy was second-in-command and more skilled in the realm of infiltration, sabotage and underhanded tactics. In fact, you could break the three of them down into a triangle of hybrids: Dinobot = Lancer/Big Guy; Rhinox = Big Guy/Smart Guy; Rattrap = Smart Guy/Lancer.
- In Trollz, Sapphire sports glasses, preppy clothes, and the stereotypical nasally nerd voice, while also being the one most excited for school and studying. The rest of the Trollz groan at the mere mention of education.
- Winx Club made a half-hearted attempt to avert the "usually the technologically-minded character" aspect by having the girls mention that Musa and Flora get the best grades; nevertheless, the show kept using Tecna in the role of The Smart Girl. Timmy is also one for the Specialists, being the tech expert for them.
- In the 4Kids version this turns a little racist; Flora's name is cut out of the best grades line, meaning that Musa, the Asian-inspired character, is the only one mentioned.
- Walden from Wow! Wow! Wubbzy! fills this role on the show. As the theme song says, "he knows about science and books and art."
