Fountain Of Youth / Western Animation

Fountains of Youth in Western Animation.

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• 101 Dalmatians: The Series: In the episode "Fountain Of Youth", Cruella believes that the water on the Dearly Farm is this, due to a series of misunderstandings.
• Ace Ventura: Pet Detective: Odora’s ultimate goal is to formulate a cosmetic that halts the effects of aging, and she’ll do horrible things to animals to accomplish it in the most bizarre ways. For example, extracting glandular secretions from Santa Claus’s flying reindeer to unlock the secret of defying gravity for the sake of trying to prevent skin sagging, or draining an elephant’s perfect memory to give skin the ability to remember its previous state.
• In Adventure Time, the (apparently) 18-year-old Princess Bubblegum suffers an accident in which she loses some of her body mass. Being a sentient wad of bubblegum in a generally princess-like shape, she is saved by being reconstructed in the shape of an apparently 13-year-old princess. Since The Mind Is a Plaything of the Body, this also causes her personality to take on the traits of a 13-year-old. The situation is, of course, temporary. ^note The writers originally planned for it to last much longer, as an entire story arc, but changed their minds and scrapped the whole idea, turning her back to normal in her very next appearance.
• The focus of The Adventures of Puss in Boots episode "Fountains", where the crew looks for the Fountain of Youth to restore a Retired Badass to his prime. Although they find it, he is forced to return to his old age to escape, and the fountain can only be used once.
• In an episode of Adventures of Sonic the Hedgehog, Dr. Robotnik plans on defeating Sonic by making him so old, he won't be as fast. As usual, Scratch and Grounder mess things up by putting the device into reverse, turning Sonic into a toddler and Tails into a baby. Later, Robotnik is too turned into a toddler. At the end, Robotnik is turned into an old man.
• The Amazing World of Gumball: In the episode "The Rerun", Nicole and Richard are regressed to infancy, causing their children to retroactively never have been born. Gumball himself comes dangerously close to disappearing, but he manages to fix things and turn everything back to normal in the nick of time.
• The American Dad! episode "1600 Candles" had Francine giving Steve a CIA drug that turned him into a kid so she wouldn't have to accept him growing up. The attempt to get him back to normal works too well and instead makes him an old man.
• The Angry Beavers episode "Act Your Age" had Norbert and Daggett become children again after consuming the wood of a tree that had been around since the dawn of time. It's then taken taken to its logical extreme when they eat the acorn that came off that tree, regressing back through several time periods untill they eventually become cellular lifeforms.
• Apple & Onion: In "Ferekh", Falafel's molokhia seems to reverse ageing, but it turns out it only redirects the age to one part of the user's body and makes the rest appear younger.
• Archie's Weird Mysteries: In "Twisted Youth", a meteorite falls into a lake and causes its waters to make any adult who touches or drinks it become a teenager again. Dilton finds out the water has no effect on teenagers or children because of their different hormones. The transformed adults have no memories of their adult lives and most of them become hedonistic and reckless, while the transformed Miss Grundy tries to hit on Reggie, who is creeped out because he remembers she is his teacher, but is taken in by her beauty. Dilton and the others manage to find a cure for the water, then fish the meteorite out of the lake to end it.
• Happens to Batman (again) in Batman: The Brave and the Bold after he is zapped by Dr. Sivana starting as a teenager, then a toddler, and then a baby.
• Ben 10 also features the literal Fountain of Youth (though it's more of a natural pool or spring), being sought by Hex who is inexplicably decrepit for the episode. Max turns into a 10-year-old and is revealed to be similar to Ben at that age. Ben and the aliens turn into toddlers. Its effects are temporary and Ben ends up evaporating the whole thing as Heatblast, which leaves the last of Ponce's crewmen free of having to guard it to live his life while Hex ended up reverted to toddler age caught in the blast. Also, when Max chemically analyzes the water, it somehow has six times the amount of hydrogen and oxygen in its makeup.
  • Ben 10: Omniverse has a de-aging ray used against Ben and Rook. Tara Strong returns to voice young Ben, and li'l Rook is ridiculously adorable... with a tail, which his species is born with but sheds at puberty.
• In one Betty Boop cartoon, the patent medicine she and her pals are peddling turns an old bearded man into a large baby — and the baby accompanying him into a tiny old bearded man.
• The plot of the 1985 miniseries Bigfoot and the Muscle Machines revolves around the search for, discovery of, and destruction of, the fountain. The villain Adrian Ravenscroft manages to use it to restore his youth, but the rejuvenation wears off after the fountain's destruction, leaving him as an old man wandering into gator-infested swamp.
• The 2006 revival of Biker Mice from Mars had this happen in the episode "Bringing Up Vinnie", where Vinnie was regressed to infancy because of Dr. Catorkian's age-reversing experiments. Throttle, Modo, and Charley then have to take care of baby Vinnie while looking for a way to restore him to his normal age.
• In the Brandy & Mr. Whiskers episode "Blind Ambition", Brandy establishes shiny rocks as currency in the jungle and seeks to get rich by selling youth tonic. Using too much of the supplement that goes into it causes the users to turn into babies and she's forced to turn to Gaspar for an antidote.
• In the Bump in the Night episode "Baby Jail," Bumpy accidentally swallows some baby formula while trying to feed a baby and becomes one of them.
• Camp Candy: Chester accidentally finds it and becomes a kid again, but the effects are only temporary. Rex DeForest sees it as a chance for Chester to destroy the camp from the inside.
• Camp Lazlo: In "Baby Bean", Raj orders a bunch of labor-saving gadgets, repeated use of which cause his limbs to atrophy from lack of use. When Lazlo and Clam come back to him later, they find that he's now a baby, so they leave him in the care of Scoutmaster Lumpus, who looks after Raj until he progresses through the other stages of his life up to that point (around ages 1, 4, and 8) until he's back to his normal age (around age 10). The episode ends with Raj getting rid of his gadgets and Lumpus finding them, leading to him becoming a baby himself.
• An episode of Care Bears (1980s) features it, with the heroes going on a quest to find it and the villains not far behind. Shreeky eventually does drink from the fountain, but because she's a little girl to begin with, she turns into a baby.
• In the Close Enough episode "The Weird Kid," Emily wishes on a magic pendant to be closer to her daughter, Candice. The next morning she wakes up in the body of a five-year-old, closer to Candice in size.
• Codename: Kids Next Door had an episode where the Fountain was revealed to be under the school, kept secret by one "girl" who had been using it for years. The Delightful Children from Down the Lane were naturally opposed to its existence and wanted to destroy it.
  • An episode had senior citizens using anti-aging cream to temporarily deage themselves into teenaged supervillain personas so that they can steal tapioca pudding.
  • One episode had an adult mind in a baby's body, who is the CEO of a major television network, use his fleet of transmission satellites to broadcast a de-aging ray across the whole world to turn everyone into babies so he'll never be called a baby again. He's thwarted when hit by his own ray and is mentally regressed to infancy to match his body, leaving his assistants to reveal they're his parents and vow to raise him better. The central component of his plan, a gadget resembling a cigar, comes back into play in another episode where it's used to manipulate the ages of the characters.
• The "Little Muriel" episode of Courage the Cowardly Dog has Muriel being turned into a mischievous little girl by a freak tornado. It then turns out the only way to undo the effect is to throw her into a tornado spinning in the opposite direction of the original one — which entails flying to the southern hemisphere.
• There have been a few episodes in Darkwing Duck that feature this.
  • An elderly villain attempted to actually make one of these so as to regain his youth and become immortal. His plan worked and he was restored to his prime. Unfortunately, in a fight with Darkwing Duck and Herb, they all became babies. In the end, the fountain was destroyed and his henchmen were turned into babies as well while Darkwing and Herb turned back.
  • In "Disguised the Limit", Darkwing is framed for a crime he did not commit. So a scientist blasts him with a ray gun that will turn him into anything he sees. At one point he turns into his daughter and a baby.
  • In one episode, Darkwing becomes super fast but the more he does it, the older he becomes. In the end he fixes it by running backwards to become younger...at one point a little too much and becomes a kid.
• In one episode of Dexter's Laboratory, one of Dexter's experiments turned virtually everyone but him and Dee Dee into babies and they had to look after their parents until Dexter could reverse it.
• Donald Duck tries to trick his nephews into believing they've found the fountain in "Don's Fountain of Youth."
• In the Donkey Kong Country episode, "Ape Foo Young", Cranky makes a potion that will make him 40 years younger, with the help of the vision of his past self. However, the effects of the potion are only temporary. Donkey Kong drinks the potion and de-ages into a baby. Diddy gets Candy to look after him until the effects wear off by telling her he's DK's nephew. At the end of the episode, King K. Rool drinks the potion and de-ages into a baby as well.
• The Dr. Zitbag's Transylvania Pet Shop episode "I Was a Teenage Zitbag" had Dr. Zitbag de-age himself into a (surprisingly easy on the eyes) teenager to try and prove he's cool to Officer Deadbeat's son Damian and the Exorsisters' nieces Listeria and Salmonella. At first he mistakenly de-aged himself into an infant, but his skeletal canine companion Horrifido helped him grow a bit older into adolescence. He reverts back to adulthood by the end of the episode.
• The Duck Dodgers episode "Duck Codgers" has Dodgers and the Cadet infected with spores from an alien plant that speeds up their aging, and must seek out a fountain on Mars whose waters are the only known cure. The spores turn out to have the opposite effect on Martians, as Marvin gets infected and regresses to a teenager, a toddler, and eventually a baby before he gets cured as well.
• In the DuckTales (1987) episode "Sweet Duck of Youth," Scrooge looks for the literal Fountain of Youth so that he can live longer. It turned out that the fountain only made a person look younger when reflected in its waters.
  • The Fountain of the Foreverglades is this in DuckTales (2017); only that this version of the fountain water drains a person's youth when touched and imbues it when consumed. Which Ponce de Leon has been using to steal youth from others for the past 500 years after finding it years ago, by luring unsuspecting guests to his hotel.
• The prologue to the Earthworm Jim episode, "Opposites Attack" has Evil Jim use his Chrono-Laser to age Jim and Peter Puppy into seniors. The elderly Jim spits out his false teeth, putting the Chrono-Laser in reverse and causing it to de-age him and Peter into babies. The infant versions of Peter and Jim then use their Sickeningly Sweet cuteness to scare Evil Jim away.
• Egyxos had one episode that had a literal fountain (actually a pool) hidden in a cave. It was used to restore and maintain the youth of one man for years.
• The Emperor's New School features the actual Fountain of Youth in one episode. Yzma uses it to become a teenager in order to trick Kuzco. It also features Pacha and Chica becoming teenagers, and ends with Yzma and Kronk becoming (somewhat freaky looking) babies.
• An episode of The Fairly OddParents! had Timmy wishing Vicky was a six-year-old so he could babysit her as payback.
  • A later episode called "Poof's Playdate" involved Timmy wishing that Cosmo and Wanda's fairy friends were babies by inviting them to his house under the pretense of a "pancake party". Trouble arises when Cosmo poofs himself and Wanda into babies to join in on the fun.
• In a cutaway gag on Family Guy, Ponce de Leon Griffin finds the Fountain of Youth and takes a dip, keeping his head above water. When he emerges, his body is the size of an infant, but his head is still adult-sized; he promptly topples over.
• The Filmation's Ghostbusters episode "Back to the Past" had Jake, Eddie, and Tracy de-aged into five-year-olds as part of a scheme to scare them to the point that they wouldn't want to be ghostbusters anymore by the time the spell wore off and they became adults again.
• The final The Fox and the Crow cartoon, "Punchy De Leon" has Fox and Crow as con men who claim to have found the Fountain, hoping to get rewarded by the King of Spain. When the King wants them to bring it for real, they set off to Florida to find it.
• Futurama did this in "Teenage Mutant Leela's Hurdles", where overexposure to rejuvenating tar resulted in Professor Farnsworth going back to late middle age, and the rest of the Planet Express crew (including the robot Bender) becoming teenagers. An attempt to reverse the process made things worse, which instead just sped up the regressing, and everyone but Leela (who opted out of the cure, in order to relive the childhood she never had) started regressing into early childhood, most of the characters went so far back that they turned into fetuses (blueprints in Bender's case).
  • And then the trope is inverted and parodied when they seek to be cured at the Fountain of Aging.
• In an episode of Hercules: The Animated Series, Pain and Panic try to kill Hercules (again), this time by using water from a spring that reverses aging. They accidentally get water on not only Hercules, but on Icarus, Adonis, Pegasus, and Pain himself. Panic and Cassandra have to watch them since they're all infants until they can find a cure.
• In the Jake and the Never Land Pirates episode "Pirate Sitting Pirates", Captain Hook as usual is being chased by Tic Toc Croc. As a result they both take a tumble knocking themselves as well as Jake and his friends into the pirate pool of youth, which can turn pirates into wee pirates. As a result they are all turned into babies. Now Smee and the other pirates must look for a flower that can turn them back.
• Jackie Chan Adventures:
  • The Dog Talisman gives its holder immortality. While it doesn't make the holder look younger, it makes him feel younger. Thus Uncle becomes incredibly strong and agile like he used to be.
  • In "Lost City Of The Muntabs", Jackie leads the wealthy Dr. Smith through the African jungle looking for the Chalice of Life. they find it in the city of the Muntabs, who drink from it regularly, thus remaining youthful. A girl who appears to be Jade's age is actually over 200. Smith steals the chalice, and without it, the Muntabs begin to age. When Smith an his elderly butler drink from the chalice, they are turned into a baby an a young boy.
  • In "Little Valmont, Big Jade," Valmont is turned into a young boy after an altercation with the wizard Daolon Wong.
  • In "The J-Tots," Jade's misuse of a spell turns the J-Team into small children.
• An episode of The Jetsons "Boy George" has George turn into a kid, though his voice is exactly the same. Another episode inverts it by having Elroy turn into an old man.
• Johnny Bravo: In one episode, Johnny drinks a potion that reverts him to infancy- physically, at least- to the delight of his mother... until she gets busy and sends him off to daycare with an attractive caretaker, to his delight. In the end, he's restored to his adult body.
• In the Justice League Unlimited episode "Kid Stuff", Morgan Le Fay's son Mordred gets his hands on a powerful amulet and, in a fit of pique after his mother insists he's too young to be responsible for it, banishes all the adults in the world to a pocket dimension. Morgan gets around this by turning some of the Justice Leaguers (Batman, Superman, Wonder Woman, and Green Lantern) into 8-year-old children so they can get the amulet back. Eventually, Mordred is tricked into breaking the spell that keeps him a child, and he vanishes into the pocket dimension as per the rules of his earlier spell. In the end, it turns out that breaking the spell meant he still had eternal life but without eternal youth, and was now thousands of years old and effectively immobile, basically a vegetable that his still-young mother will care for — Forever. Harsh. Of course, one wonders if Morgan can't just cast it again... or just won't.
• The Karate Kid: In "Over the Rainbow" Miyagi, Daniel, and Taki stumble on a hidden community with one fueled by the shrine.
• Two instances in Kim Possible:
  • The first in the Made-for-TV Movie "A Sitch in Time", when the teamed-up bad guys, having possession of a time-traveling idol, use a device to make themselves toddlers so they can infiltrate the title hero's youth.
  • The second is in an episode where Ron is continuously sent through a machine that turns adults into babies. He goes through so many times that when he finally gets back to his own age, he is wearing a diaper.
• Happens in The Legend of Korra episode "A New Spiritual Age", when Korra's emotions cause her to age down into a child while in the Spirit World.
• One episode of Lilo & Stitch: The Series involved an experiment known as the "Babyfier" that turned its victims into infants.
• The Magic Key: This is naturally featured in “The Fountain Of Youth”. Oddly, it’s not a good thing- even a tiny sip from it will cause the drinker to revert to being a baby, and the underground stream that feeds it has started seeping into the wells that a nearby village drinks from. Fortunately, its effects can be perfectly counteracted by water from the Fountain Of Age.
• In The Mask episode "Little Big Mask", The Mask creates an anti-aging cream that winds up working a little too well, and causes him (and Stanley) to get younger by the minute, and he must find a way to fix it while Peggy tries to keep him focused.
• Mickey Mouse Clubhouse:
  • The episode "Goofy Baby" revolves around Mickey and the gang trying to care for Goofy when he gets turned into a baby by Ludwig von Drake's Tick-Tock Time Machine.
  • The same issue is dealed with in "Goofy Babysitter", only this time, Mickey and all his friends but Goofy get transformed.
• My Little Pony: Friendship Is Magic:
  • Age spells can only be performed by the highest-level unicorns. Trixie is able to turn Snips into a baby and Snails into an old stallion with her magic boosted by an Alicorn Amulet; Twilight Sparkle, on the other hand, is unable to reverse it. In order to rid Trixie of the corrupting amulet, Twilight fakes it by claiming to have an equally powerful artifact while having Granny Smith and Sweetie Belle impersonate Applejack and Rarity respectively.
  • Twilight pulled it off for real in "The Cutie Mark Chronicles", though, but not intentionally; during her entrance exam to magic school, she was startled and lost control of her magic, turning the not-yet-hatched Spike into an adult dragon.
• The New Adventures of Superman: In "Merlin's Magical Marbles", Lex Luthor and his henchman use the aforementioned marbles to transform themselves into children to allow them to escape undetected from the scenes of their crimes.
• The Oggy and the Cockroaches episode "Back to the Past" features Oggy, Jack, and Bob accidentally facing the wrath of a witch and turned into elementary school-aged kids, with Olivia and Joey forced to track the witch down to reverse the spell, while Dee Dee and Marky watch over the three. In the end, the same ends up happening to Joey, Dee Dee, and Marky.
• PAW Patrol: In "Pups Save Baby Humdinger", Tracker has a dream that Mayor Humdinger turns into a baby. Now it's up to the pups to find a special coconut to reverse the spell.
• In the Pet Alien episode "The Boy Who Cried "Waaah!"", Dinko becomes terrified of the idea of Tommy growing old and tries to halt his aging process, only to accidentally turn him into a baby instead.
• In a relatively rare example of kids getting younger, the Phineas and Ferb episode "Agent Doof" has the titular characters being turned into babies. Needless to say, Candace ended up a Badly Battered Babysitter in record time. And at the end of the episode, even their mother and the Fireside Girls are turned into babies. Candace is obviously exasperated, and openly hopes it wears off by the next episode (which it also obviously does).
• The Problem Solverz episode "Time Twister" features a roller coaster capable of traveling through time, which Alfe takes advantage of by going back in time to eat pizza over and over again, and he becomes younger as a result.
• Quack Pack has the episode "Can't Take a Yolk" where Donald really is regressed to youth— represented here by an Art Shift to his original character design from the 1934 short "The Wise Little Hen".
• In the Rainbow Butterfly Unicorn Kitty episode "Fountain of Too Much Youth", Miguel learns his favorite malt at Mythic Malts is on the kids' menu, so he and Felicity go on a quest to find the Fountain of Youth. When they find it, Miguel takes a huge gulp and turns into a toddler, but since he was supposed to swim in it and not drink it, he starts getting younger and younger, so Felicity has to babysit him while he gets progressively younger on a journey to the Wheel of Aged Cheese. After a back and forth between baby and teen/adult, Miguel is restored, but Felicity is splashed with the water and becomes a baby herself. She's turned back to normal, but all four of the main characters get wet and the episode ends with them as babies.
• In The Real Ghostbusters episode "Three Men and an Egon," an incident with a ghost causes Egon to begin regressing, and threatens to reduce hi to nothingness unless the process is reversed.
• Rocko's Modern Life: Rocko, Heffer, and Heffer's grandfather are on a cruise filled with senior citizens when they cross The Bermuda Triangle, which alters their ages. This causes a mix of Overnight Age-Up and Fountain of Youth-all the elderly revert back to young(er) adulthood, the ship's crew become babies, and Rocko and Heffer become elderly.
• The second-to-last episode of Rugrats "Fountain of Youth" has Tommy, Chuckie, and Kimi think that the Fountain of Youth exists. They are happy until Angelica tells them that she will be in charge when its powers take effect on the adults and tricks them into thinking that the fountain in the lake has said powers. After several unsuccessful attempts at preventing the adults from going into the lake, they decide to drain the lake... by pulling on a chain that's attached to a boat, which is far too heavy for them to move by even an inch.
• The cartoon version of Space Ace:
  • The Infanto Ray made some appearances; one of them was episode 3, in which the victim was Borf. Another example is episode 6, where the Infanto Ray was just a round circle. However, it made its return in episode 11, in which Borf uses it on the victims, and one of them was Kimberly, but after Dexter was brainwashed with the brainwashing device, Kimberly turned back into her adult form right after Dexter grabbed Kimberly while in the prison.
  • Another ray, the Age Ray appeared in another episode before episode 11. The Age Ray was meant to be used on Dexter so that Dexter can remain as Ace, but when Borf gets hit by the Age Ray, he does not turn into a baby, but rather into a teenager, and Borf energizes at random times throughout the entire episode like Dexter.
• Spider-Man: The Animated Series: The aged crime lord Silvermane's long-standing goal was to find a way to restore his youth. Unfortunately, the Applied Phlebotinum worked a little too well, and he reverted to infancy. A later attempt to fix it also works too well, restoring him to his original old age instead of to his target age.
  • Adrian Toomes, the Vulture, shares the same goal and even uses the same Applied Phlebotinum as Silvermane. It works out considerably better for him, to the point that he is the only villain in the entire series who gets everything he wanted in the end. He's also the reason Silvermane's attempt to undo his infancy works too well.
• In the SpongeBob SquarePants episode "Goo Goo Gas", Plankton develops both a super-aging gas (a senior citi-spray if you will) and a de-aging gas (the title Goo Goo Gas). The latter ends up working a bit too well, turning him into an even smaller protozoan.
• The Star Trek: The Animated Series episode "The Counter-Clock Incident" has the Enterprise get sucked into a parallel universe where entropy is reversed and things age backwards; they quickly start getting younger and younger, leading to an adorable 7-year-old Spock trying to hold the mission together. Luckily, the (non-canon) first captain of the Enterprise, Captain Robert April, is on-board. He de-ages from an elderly man to roughly Kirk's true age.
• Star vs. the Forces of Evil: In "Conquer", Miss Heinous/Meteora is changed into a baby thanks to a combination of Star's and Eclipsa's magic, giving Eclipsa the opportunity to give her daughter a better, happier life.
• Steven Universe: In "Steven's Birthday", Steven tries to fake a growth-spurt on his fourteenth birthday after realizing he hasn't physically aged since he was around eight years old. Unfortunately, the strain of making himself taller with his Gem shape-shifting abilities causes him to temporarily revert to infancy. Connie comforts Steven by assuring him she'll be his friend no matter how long it takes to get him back to normal, and by the next day Steven is back to his old self. And as a bonus, he's grown his first facial hair!
• Princess Toadstool got turned into a baby in The Super Mario Bros. Super Show! after falling in the Fountain of Youth. To get her back to her real age, the brothers had to make the waterfall in the fountain go up instead of down and put her in the fountain.
  • That technically makes this episode the first appearance of Baby Peach.
  • One episode of The Adventures of Super Mario Bros. 3 had one where Kooky builds a time machine to take him and Koopa back in time so they can prevent Mario and Luigi from arriving at the Mushroom Kingdom, with the Marios and Toad following them back to stop them. Unfortunately, it malfunctions thanks to Koopa's impatience, so not only do they all go back in time, but they all get turned into babies, too. Which means this had our first appearances of Baby Mario and Luigi as well. Although this Baby Mario and Luigi still have their mustaches.
• Super Sunday: The entire series "Bigfoot and the Muscle Machines" was built around a young journalist, the members of a traveling monster truck show and a ruthless elderly billionaire named Adrian Ravenscroft searching for the Fountain of Youth. When Ravenscroft gets to it first, he turns into a young, 30-something man, vowing to destroy his adversaries. But the good guys destroy the fountain of youth, and it isn't long before Ravenscroft reverts to his elderly self ... fleeing but unknowingly running into a swamp infested with hungry alligators.
• Superfriends:
  • The All-New Super Friends Hour segment "The Mysterious Time Creatures" had Superman, Wonder Woman and Aquaman turned into children by the episode's villain Dictor.
  • The Super Friends: The Legendary Super Powers Show episode "Uncle Mxyzptlk" has exposure to red kryptonite turn Superman into a Bratty Half-Pint. After the de-aged Man of Steel, nicknamed "Superbrat" by Firestorm, causes trouble for the Super Friends, things get worse when Mr. Mxyzptlk shows up and the reality-warping fiend from the Fifth Dimension exploits Superman's state of immaturity by encouraging him to use his powers to create further havoc.
• Happens a few times in The Superhero Squad Show all due to messing around with time manipulation.
  • The first time occurred in "Fate of Destiny!", where Thanos uses the Time Stone to de-age all of the occupants of a Skrull Ship and Captain Marvel into babies for his own amusement.
  • Happens again when Iron Man's time machine in "Revenge of the Baby-Sat!" backfires and turns Iron Man, Scarlet Witch and Falcon into toddlers, where Wolverine (to his dismay) has to babysit them, while the childish Hulk enjoys it. The opposite happens to Ms. Marvel and Thor when Dr. Doom gets control over time, but H.E.R.B.I.E. then reverses all of the inappropriately aged squaddies back and in the process turns Dr. Doom into a toddler as well.
• Leave it to Superjail! to come up with a twisted, disturbing take on this one. When the Warden is feeling old and decrepit on his birthday, Jared buys him some "ancient Chinese mystery butter" that's supposed to restore someone's youth. It ends up getting put on the birthday cake, though, leading to a bunch of inmates regressing to toddlers. Toddlers who then proceed to violently kill each other.
• In the Tangled: The Series episode "You're Kidding Me!" Cassandra finds an enchanted top, which turns her and Lance into young kids, while Shorty is turned into a baby with a beard.
• In the Teen Titans (2003) episode, "How Long is Forever?" after a battle where his time suit is dmaged, Warp is reduced to infancy.
  • In the Season 4 finale, Trigon uses Raven as a portal to enter Earth's dimension. While this initially appeared to destroy Raven, Robin later found her, now a child with no powers, and (aledgedly) no memories.
• Two episodes of the original Teenage Mutant Ninja Turtles dealt with this; in "Back to the Egg" it happened to Leonardo and Michaelangelo, and in "Adventures In Turtle Sitting" Leonardo, Raphael, and Donatello turned into children and the slacker of the group Michaelangelo had to look after them.
  • Another episode "Leatherhead Terror of the Swamp" when the mixture of the leftover mutagen that affected the Punk Frogs and Leatherhead is concentrated creating the Fountain of Youth. Shredder accidentally fell in the fountain turning him into a baby.
• In Wish Kid episodes "A Grand Ol' Time?", Nick wishes that his grandpa was young again and becomes a little younger than his grandson and starts playing tricks on the bully next door. Unfortunately, it doesn't last long
• ThunderCats (1985):
  • In "Time Switch," Lion-O is exposed to gases from a Suspension Capsule that make him grow younger over the course of the episode. This is reveresed by entering the Cave of Time, where you age many times faster than normal.
  • In "Thundercubs," Panthro, Cheetara, Tygra, Snarf, and Snarfer wander into the Canyon of Youth, were they are regressed to children. As before, this is remedied using the Cave of Time. In "Return of the Thundercubs," Panthro, Cheetara and Tygra fall victim to the Valley of Youth again, but this time are restored by the Mirror of Truth.
• Tiny Toon Adventures:
  • In the episode "Love Disconnection" (and within that, the segment called "The Amazing Three"), Shirley the Loon tries to make the moves on an older male duck at a senior dance by asking him what his astrological sign is. Out of his beak comes Antiquated Linguistics as he belittles her, telling her how childish and unfounded astrology is. However, she has such a hard time understanding him that she reverts into a baby! Prior to that, Shirley said that she would impress the duck with her "keen wit and intellect".
    Shirley: Like, umm, what's your sign?
    Duck: Ah! A devotee of the unseen world. The universe fantastique. Almost amusing in an infantile sort of way, though terribly childish and laughably unfounded.
    (Shirley reverts into a baby)
    Duck: I believe Voltaire put it best when he likened astrology to astronomy as the mad daughter of a wise mother. Don't you agree?
    Shirley: I go like, nappy-poo now. Goo googoo gaa gaa gaa? (she crawls away)
    Duck: Quite.
  • The episode "Fields of Honey" reveal that laughter keeps toons young. This is shown where upon having people laugh at her cartoons after so many years, an elderly Honey is restored to her prime.
• Transformers:
  • In the episode "Forever Is a Long Time Coming" from The Transformers, because of the effects of the Quintessons' time travel device, female captain Marissa Faireborn is zapped by a ray and temporarily transformed into a baby.
  • Transformers: Rescue Bots: Dr. Morocco stole a mechanical Fountain of Youth that he uses to stay young but he must use it very often due to the effects of the machine which make him age much faster than usual.
• The T.U.F.F. Puppy episode "Pup Daddy" has an invention of Keswick's end up turning Keswick, the Chief, Kitty Katswell and Snaptrap, and later Snaptrap's underlings Ollie, Francisco and Larry, into teenagers. As time goes on, the characters affected continue to get younger, regressing to childhood and infancy, with Dudley having to keep his de-aged allies and enemies out of trouble and reverse the effects before they all undergo Death by De-aging.
• The 8-minute pilot of Twelve Forever has the Butt Witch create a potion that turns people into babies. The protagonist Reggie is tricked into using it on Tristan, a boy she angered. After Reggie and her friend Shane restore Tristan to his true age, the Butt Witch falls victim to her own concoction and has to be carried away by her henchman.
• The Wacky Adventures of Ronald McDonald had this happen in the video "Birthday World", which sees the McDonaldland gang go to an amusement park called Birthday World where Ronald and his friends are turned into toddlers and babies by a Mad Scientist named Pinchworm.
• In the Wacky Races (2017) episode "Formula Racing", an accident causes Peter Perfect, Penelope Pitstop, I.Q. Ickley, and the Gruesome Twosome to become babies. Dick Dastardly gets stuck looking after them while Brick Crashman and P.T. Barnstorm search for a way to return the racers to their normal ages.
• Winx Club:
  • "Black Willow's Tears": Flora defeats the Trix by dumping them in the Black Willow's time-reversing stream. When they get out, they find themselves as preteens and are horrified and flummoxed at their appearances. They underwent one hell of a wardrobe upgrade.
  • "The Gem of Empathy": The episode's subplot revolves around Stella finding a pin with an age-changer spell in it, which turns her into a 5-year-old. Musa and Brandon take turns looking after her and she wears them ragged with her antics. This helps her put her normal behavior in perspective so, once she's back to normal, she becomes less whiny and more patient.
  • In 'Baby Winx', Brafilius uses a spell that turns the Winx into toddler versions of themselves. They are still able to use magic but it's limited and they simply can't focus on the task at hand. It's up to their boyfriends to rear them back in line and take care of them.
• In the Woody Woodpecker short Born to Peck, this is added in at the last second by the animator to save the life of an elderly, suicidal Woody.
• In an episode of the cartoon Yogi's Treasure Hunt called "Secret Agent Bear", Yogi and his pals spoof James Bond movies. In it they accidently fall into the fountain of youth and the adults become little kids and the kids become babies. Later the villian uses the water to turn world leaders into kids and then is turned one himself at the end.
• Zeke's Pad: In "Portrait of a Young Artist", Jay manages to help Zeke draw himself younger following his brush with Rapid Aging before it is too late, and Zeke is back to 14. But this time, Zeke continues to become younger! He behaves like a child too, stuffing his face with chocolate and throwing a tantrum. Even worse, his parents are about to come home, and they do not want to see Zeke as a 3-year-old kid.

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