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"Ford, you're turning into a penguin. Stop it."
—Arthur Dent, The Hitchhiker's Guide to the Galaxy
A character is transformed into an animal, either completely or partially (like a Biological Mashup). The defining quality for this trope is whether their transformation was Voluntary Shapeshifting or not:
- There are many characters whose ability to transform into animals is a special power. Several of these are Shapeshifters whose power is limited to animal forms, and oftentimes a set number at that. There are also quite a lot of Shapeshifting characters who can turn into anything, but prefer to transform into animals, presumably because you can get more done in the shape of a living being than something inanimate. Our Werebeasts Are Different covers werebeasts.
- Others are characters unwillingly transformed into animals, usually as a punishment (ironic or otherwise) or Curse, more often than not by the dark magic of the Big Bad. In any case, regardless of species, the target is none too happy about being an animal. (Indeed, for some reason, characters are often just as upset over being turned into swans as they would be if they were turned into worms. There is an intriguing amount of Cursed with Awesome associated with this trope.) The target may lose the ability to speak, and must work hard to get the message to their friends about what happened. This is sometimes combined with a Freaky Friday Flip, leaving the animal's mind trapped in the human character's body (where Hilarity Ensues). This is frequently accompanied with some sort of time limit, after which it will be difficult or impossible to reverse the process.
In any case, a physical transformation into an animal may be accompanied by a mental transformation into that animal, more so if it was involuntary. It may also allow the character to use whatever skills and abilities (like a keen nose or ability to fly) are associated with that animal ... as well as whatever strange instincts or unhygenic behaviors may also be associated with that animal.
The transformation itself may be scientific in origin, or mystical. Popular mystical transformations include Werewolves and other Werebeasts, wolves (who may be confused for werewolves), or such chestnuts as a witch turning people into toads. And who can forget such classic fairy tales such as swan maidens or The Frog Prince? In fact, Animorphism is Older Than Feudalism, with The Odyssey describing Circe turning Odysseus' sailors into pigs.
- 1 Voluntary Animorphism
- 2 Examples of Involuntary Animorphism
- All familiars, and Yuuno, in Magical Girl Lyrical Nanoha.
- Ichigo of Tokyo Mew Mew is a borderline case. The intended effect of her cat genes is the ability to voluntary transform into a Catgirl; however, as her cat DNA starts to overtake her human DNA, she starts involuntary growing cat ears and tail when excited, and eventually begins to fully transform into a cat. Another recurring character in the show can become a cat voluntary, but only for a limited time.
- Yoruichi in Bleach spends a lot of the series as a cat because she likes to. Most of her transformations to and from human are to mess with other members of the cast (like Ichigo).
- One Piece has the Zoan variety of Devil fruits, which allow the eaters to transform into a certain animal depending on what the fruit is, as well as a half-human hybrid of said animal (and yes, even humans are counted as an "animal"). Most fruits have a certain "model" for animals that are in the same family (EX: Dog Dog fruit, Model Wolf), or different sub-branches like "Awakened" which is more beast then man, "Mythical" like a Phoenix, and "Ancient" like a T-Rex.
- Even inanimate objects can "eat" a Zoan Devil Fruit, they gain characteristics of living being and their corresponding animal's intelligence; they also can transform into the animal itself, and hybrid (in the absence of a better word) or their "original" object form.
- Early in the series, Kotaro of Mahou Sensei Negima with his powers sealed revealed the ability to become a small puppy. Recent events show that he can, at full power, become a Super-Powered Big Badass Wolf.
- Ai to Yuuki no Pig Girl Tonde Buurin is about a warrior style Magical Girl (think Sailor Moon, Tokyo Mew Mew, or Pretty Cure) whose magical form is... a super powered pig. She does this willingly, but grudgingly, in order to earn pearls for good deeds so that once she gets 108 of them she can become a human superheroine instead.
- Essentially the entire point of +Anima.
- In Ruin Explorers, Ihrie was cursed as a child so that she turns into a mouse whenever she casts magic. Fortunately, she carries along a medicine that can reverse the effects, though having a limited supply at any one time means she still has to choose her battles.
- Pokémon has an episode in the Johto League saga wherein Ash meets a witch named Lily. She has a recipe for a potion that will let you read a Pokemon's mind, but needs some ingredients first. At the end of the ep, Ash is turned into a Pikachu, which is affectionately nicknamed Ashachu. It launched a hundred Fanfic sequels when that happened.
- Rumiya and Ryo-Ohki in Pretty Sammy.
- Some fairies in Fairy Navigator Runa have animal forms as well as human ones.
- Snowbird from Alpha Flight is an Inuit demi-goddess who can shift into any animal, but it's always an albino female. For a time, she could only shift into creatures native to Canada (for that matter, she couldn't leave the country's borders without dying). Those restrictions faded with her immortality when she lost her virginity, but the writers seem to have forgotten this.
- Viktor Romanov in Nikolai Dante can turn into a giant eagle due to his weapon crest.
- In The Secret Life of the Backyard Kids, Tiffany transforms into a giant cat, and since Jorge is a Squishy Wizard, he calls his nanny and she tells him to transform into a panther. He not only does just that but does a Shout-Out to Michael Jackson.
- Daine in Tamora Pierce's Immortals quartet is a shapeshifter thanks to her Wild Magic. She has increasing control over her transformations as the books go on, though she retains her human mind even within the animal shape.
- The problem of her keeping her human and animal self separate is briefly addressed in Wild Magic, but takes little time to fix once she tells Numair, the most powerful mage in the world, that she's having trouble.
- One third of the premise of the series Animorphs. (The other 2/3 are Alien Invasion and Ragtag Bunch of Misfits.) Also the Trope Namer
- Several characters in the Harry Potter series (such as Professor McGonagall and Sirius Black) are "animagi", who can transform into specific animals (McGonagall becomes a cat, Black a large dog). Unlike most instances, this practice is very strictly watched by the government (who keeps tallies on the number), and is said to be incredibly hard to do.
- Wizards in Ursula K. Le Guin's Earthsea Trilogy books are capable of transforming into animals, though the process is dangerous. In one particularly memorable example, the protagonist Ged turns into a hawk in order to escape an enemy - and, forced to spend weeks in his new form, almost ends up getting stuck that way.
- absolutely hilarious when you think about the fact that Ged is played by Shawn Ashmore in the Syfy version of the first book, that Ashmore was Jake Berenson in the TV version of Animorphs, that Jake saves Tobias from a swirly before the first book... and that Tobias ends up stuck as a hawk (red-tailed hawk, to be exact) at the end of the first book.
- Wizards in Nightrunner can turn themselves and others into an animal form that is said to be their "true nature." The fact that it can be done to others, of course, means it's not always voluntary.
- Many of the evil characters in The The Caretaker Trilogy Trilogy are Half Human Hybrids of some sort, but the only one shown to actually be capable of turning into the animal whose traits he borrows is Colonel Aranha. For those who didn't get the Meaningful Portuguese Name, he turns into a gigantic tarantula.
- In The Thief of Always, victims of the Big Bad turn into creepy, giant fish when their souls are removed. It's a gradual process.
- The Were Hunters in Sherrilyn Kenyon's Dark Hunter series were created by a king using his children, animals, and Magic Genetics to create Shapeshifting progeny.
- In the Xanth series, Dolph can turn into any living thing as his magical talent, while his grandfather Trent can turn any living thing into another living thing as his.
- Dinah and Dorinda, the main characters of Eric Linklater's children's novels The Wind on the Moon, use a magic potion given to Dinah by a witch in order to transform themselves into kangaroos. They are, however, stuck in kangaroo form until they can locate the bottle with the potion to transform them back to humans, which leads to them being caught and put in a zoo. In the zoo, they also meet Mr. Parker, formerly a human detective, who was transformed into a giraffe for no apparent reason (he blames it on wishing he was taller back when he was human).
- In the Chronicles of the Cheysuli series, the eponymous Cheysuli can turn into the shape of their Lir (a Bond Creature that is some kind of animal bear, wolf, hawk...) some can turn into the form of any Lir they want.
- In Rick Riordan's The Heroes of Olympus series Frank Zhang a demigod son of Mars can be anything. According to Mars this means anything within reason, any living animal. This gift did not come from Mars however, but Poseidon, who is a distant ancestor on Frank's mother's side. His whole family can do it, and have for generations going back to Periclymenus a legendary Greek hero who Poseidon first bestows this gift on. Percy, Poseidon's actual son, is noticeably jealous of Frank's gift.
- Everyone in The Last Dove can (somewhat) voluntarily shapeshift.
- Manimal had a main character with transformation into animals as a special ability.
- In True Blood there is a shapeshifter community. They can turn into any animal they want; they just have to see it in order to "copy" it. There is however and exception; each person has an animal that they feel confortable with; they can transform into it at any time without having to see a real example. The hability is passed from generation to generation.
- Woof!, which features a kid who Involuntary Shapeshifting changes into a dog at times.
- The TV Miniseries version of the Earthsea Trilogy had a story about a wizard who got so obsessed with shapeshifting into a bear that the bear's personality eventually displaced his own, causing him to eat his entire family. The story comes from the first Earthsea novel, "A Wizard of Earthsea", where the bear-wizard is only said to have killed his son.
- The New World of Darkness sourcebook Skinchangers has options for playable characters using almost every possible variation of this trope, with War Against The Pure and Changing Breeds adding a few more for good measure.
- The Old World of Darkness games featured shapeshifting Splats as well.
- Werewolf: The Apocalypse is obviously about werewolves, but also lets you play as were- hyenas, spiders, cats (lions, tigers, leopards, lynxes, etc.), ravens, bears, foxes, crocodiles, alligators, lizards, snakes, coyotes, rats, and sharks. The extinct (unplayable) races are the werebats, wereaurochs, and wereboars.
- Vampire: The Masquerade has three clans with specialized disciplines that allow for animal shapeshifting: the Gangrel have Protean (the typical bats, wolves, and fog, though variations exist); the Followers of Set have Serpentis (guess); and the African bloodline Akunanse have Obomwe, which allows the Kindred to turn into any animal provided she smears her body with its blood (the creature must obviously be big enough to have enough blood for this to be possible).
- Changeling: The Dreaming has the pooka, selkies, commoner hsien, and inuas (a Native American kith). A member of these kiths has one animal form that she can shift into. The pooka and inuas choose one at character creation, while the selkies turn into seals, and each commoner hsien kith has one animal form its members shift into: cats, fish, monkeys, snakes, and badgers (in case you're curious, the noble hsien kiths are based on the 5 Taoist elements)
- In White Wolf's other main RPG, Exalted, the Lunar Exalted are able to take the form of any species, so long as they've drunk the heart's blood of a member of that species, and can build up an impressive library of forms this way. They can also apply this to humans, although it works a little differently (each human form they add to their library allows them to take that /specific/ human form).
- It actually works that way for animals too. You are taking that animal's form. It's just that the most common hunt is for one that's an excellent specimen but doesn't stand out. You could, say, hunt an espionage target's favorite dog so you'd be close to him for an extended period.
- The Dungeons & Dragons Barbarian-based PrC Bear Warrior is able to transform into a type of bear while they rage.
- And druids can turn into any animal.
- Wizards too, with the right kind of spells. And (like druids) transform other into harmless critters as per the second example of this trope.
- In New Horizon, Medeans merge with the genetic code of the native wildlife. Unlike most other examples of this trope, this is permanent... although, oddly, it doesn't effect any kids they have.
- Tha Makuta in Bionicle liked to take on animal forms, most famously Miserix, who preferred reptile forms to his original body (his only existing official image also has him turned into a dragon). The Phantoka Makuta team chose the form of bats, while the Mistika team took on the semblance of insects. However as a subversion, due to a mutagen, they couldn't turn back.
- Druids in Warcraft III could turn into the totem animal whose demigod they were devoted to.
- Druids in World of Warcraft can turn into various animal shapes. Bear, Cat, Seal, Bird, Tree and an owlbear thing.
- Dragons are also known to have a human form, notable ones being Kalecgos, Alexstraza, and Neltharion (Deathwing as most players know him).
- It's not ALWAYS human. Alextraza and her consert turn into High Elves, Chronomaru turns into a Gnome, Yersa becomes a Night Elf. Goblin and Blood Elf forms have been seen as well for other dragons. Also Deathwing human forms or his human one has changed a lot since his days as Lord Prestor.
- Deathwing's human Form retains the reforged lower jaw that he has in his dragon form. (See Fridge Horror.)
- Druids in Diablo II: Lord of Destruction can acquire the ability to turn into a werewolf, or the slightly-more-exotic werebear.
- Most Dragons in Fire Emblem games can transform from one form to the other, with varying degrees of ease. There are a few unique cases because the games all take place in different universes.
- Fire Emblem for the GBA seems to imply that it's quite difficult for dragons to switch from form to form without losing their memories and personalities from their other forms.
- That could be because one character was forced to undergo their transformation, instead of choosing it voluntarily like any other time.
- Sword of Seals and Sacred Stones both required that your Dragon unit have a stone with a limited number of charges in their possession in order to switch forms.
- Path of Radiance and Radiant Dawn added the Laguz, of which Dragons were one of the many races, who could transform from one form to the other at will, though they would revert to their humanoid state when they ran out of transformation points. A select few characters could stay transformed as long as they willed it, but most of them had their stats cut to make up for it. In Path of Radiance, the Laguz would transform without the player's choice or input when their meters were full, but Radiant Dawn allowed the player to activate it whenever they wanted so long as they had transformation points to use.
- Fire Emblem for the GBA seems to imply that it's quite difficult for dragons to switch from form to form without losing their memories and personalities from their other forms.
- In the Banjo-Kazooie series, visiting one of two shaman-type characters (Mumbo-Jumbo in the original and Grunty's Revenge or Humba-Wumba in Tooie) would allow you transform into different things; this is usually an animal (but not always; other transformations have included a tank, a submarine, and a washing machine). Oddly, the main characters are already animals.
- The entire premise of the Bloody Roar game series is based on this trope.
- Likewise EVO Search for Eden.
- Altered Beast has the Werewolf, dragon, bear and tiger forms. Also for the Big Bad, he has a rhinoceros form.
- In The Legend of Zelda: Twilight Princess, Link transforms into a wolf. It is initially involuntary due to the Twilight invading Hyrule, then Zant curses Link to make it permanent; eventually, the Master Sword breaks the curse, and Link gains the ability to transform at will. Interestingly, instead of throwing away the gem that cursed Link in the first place, they hold onto it, and apply and remove it using the Master Sword to switch forms.
- In A Link to The Past, entering the Dark World without the protection of the Moon Pearl causes Link to transform into an adorable, defenseless, pink bunny-man. All in all, becoming a wolf was a much better deal.
- Solatorobo provides a rare inversion: In a world populated by anthropomorphic dogs and cats, the main character can transform into a human to become more powerful.
- In El Goonish Shive, Grace can turn completely into a squirrel.
- Ellen once turned herself into a duplicate of the family cat, "Brownie". She could still talk via magic and retained her mind.
- Kodotai, Bestiario, Manimal, and Menagerie from the Global Guardians PBEM Universe all have the power to assume the shape of any animal species they want. Russian hero Ursa can turn into a giant brown bear. Indian hero Bagha can turn into a large Bengal tiger.
- Limyaael has a rant on shapeshifters, on shapeshifter societies and on blurring the distinction between the "human" part and the "animal part".
- In the Whateley Universe, there are Weres who can shift into animal or were-animal forms, plus some mutant Shifters can do it. (Some mutants end up stuck in the involuntary version because of the way their power first manifests.)
- Dragore from both Furtopia RPs of Darwin's Soldiers was turned into a dragon for unspecified reasons.
- Professor Sehack from the rebooted Furtopia RP was turned into a Bengal tiger for unspecified reasons.
- Qrow Branwen and his sister Raven from RWBY were given the power to turn into a crow and a raven respectively by Ozpin.
- Beast Boy from Teen Titans has this as a special power.
- Interestingly, the involuntary subtrope occurs in the episode "Bunny Raven, Or How to Make a Titanimal Disappear". Mumbo the Magician changes the Titans into various animals. Beast Boy is rendered only able to change into inanimate objects, with a lamp as his base form.
- In the comic book, Beast Boy is known as Changeling and while he can't assume giant T-Rex forms without great strain, he is able to speak in any form. This is because he's not limited to shifting into animals, it's just a preferred style.
- Jayna of the Wonder Twins from Superfriends. When the twins touched, Zan could turn into some form of water/ice, while Jayna could transform into any sort of animal.
- The Monkey Talisman in Jackie Chan Adventures. The owner can turn him/herself or others into any animal they can think of.
- Wild Kratts has this as the founding concept, in which the main characters can assume animal shapes using the Applied Phlebotinum in order to get close to the real animals.
Examples of Involuntary Animorphism
- In The Cat Returns, Haru is turned into a humanoid cat so she will make a more suitable bride for the cat prince.
- In Fullmetal Alchemist, it's possible to combine human beings with animals to create chimeras. If the procedure comes out right, the creature should have human intelligence and several traits from the animal they're mixed with (both advantageous and drawbacks), and some can even shift from their half-animal form to an apparently normal human. They are kept a secret from the public because of the obvious ethical issues they pose (lets just say the subjects did not volunteer for the experiments). So far we have seen snake, lizard, bull, dog, lion, toad and monkey chimeras.
- In Dragonball Z there are a couple of notables. Captain Ginyu, of course, is turned into a frog when Goku interrupts his attempt to swap bodies with Vegeta by tossing a frog in the way. Saiyans with tails will, when looking at the full moon, turn into very large apes. Also inverted during the 22nd Tenkaichi Budokai, when we meet Man-Wolf. He was a humanoid wolf who turned into a human during the full moon. When Jackie Chun previously blew up the moon, it left him stuck in wolf form, and quite angry about it. So, Jackie hypnotizes him into his human form permanently.
- In Bludgeoning Angel Dokurochan Dokuro has a bad habit of doing this to students who get in the way between her and Sakura. One she turns into a baboon, the other an Shiba dog. No one seems to care. Made extra-funny by how they render the change: replacing the characters heads with paper cutouts, as seen here.
- One chapter of To LOVE-Ru and one chapter of To Love Ru Darkness are devoted to this, Rito being turned into a dog and found/petted by Haruna in the first one, and Haruna being turned into a cat and found/petted by Rito in the second.
- Thor was turned into a frog once because of a curse by Loki.
- As mentioned above in Western Animation, the Lizard.
- Cat People has werecats who are the distant offspring of black leopards with their human worshipers. Transformation is invoked by carnal relations.
- There are quite a few examples in Disney productions:
- Lampwick and the other boys partying on Pleasure Island literally make asses out of themselves in Pinocchio.
- Beauty and the Beast, obviously.
- In Brother Bear, your spirit evidently takes the form of your totem animal (good news if your totem is an eagle, maybe not so much if your totem is a salmon). The protagonist Kenai is turned into a bear by the spirits to teach him a lesson. Kenai eventually gets over his angsting over being transformed and opts to stay a grizzly and adopt the cub Koda as his little brother.
- And don't forget The Shaggy Dog on the live-action end.
- In the Kim Possible, episode "The Full Monkey", Lord Monkey Fist curses Kim with a magic amulet, which causes her to develop a monkey-ish physique... on school picture day. Monkey Fist himself is part monkey due to radical experimentation.
- The Emperor's New Groove
- The Princess and the Frog
- "Jeepers! I'm all furry!"
- The short story "The Fly" and its two movie adaptations are a high-tech and horrific version of this, where either a man and a fly exchange heads, or a man slowly becomes a fly.
- In fact, this is a staple of horror and sci-fi films from the era, as evidenced by the titles "The Alligator People", "The Ape Man", "The Bat People", "The Brooklyn Gorilla", ad infinitum...
- Quite a few of the characters in Stardust get turned into animals under a number of different circumstances. A farmer is turned into a goat by the wicked witch - and then on top of that she changes him back into a human later. A female human! If that's not enough, she turns another goat into a man to act as his/her father. The protagonist is turned into a dormouse by another witch, but only because he's easier to carry in her wagon this way and she changes him back as soon as they reach their destination. Finally, a fairy woman changes into a jay and back, though it's not made clear if this is under her own power or not - there are a lot of odd things going on with this character.
- The book makes it quite clear that the fairy woman's shapeshifting is involuntary. This probably applies to the film as well.
- She turned me into a newt!
- I got better!
- One of the first stories of Ovid's Metamorphoses involves the transformation of Io into a white cow. Considering that this story was old by the time Ovid recounted it, this one is definitely Older Than Feudalism.
- And another set of Metamorphoses, this one by Apuleius (second century CE), involves a young man, Lucius, who experiments with a witch's charms in her absence and ends up as a donkey.
- Franz Kafka's The Metamorphosis; the protagonist has tranformed into a bug (literally "vermin"), possibly a beetle. If that's true, it adds a layer of irony to his death: he could've flown away, if he only knew...
- In The Sookie Stackhouse Mysteries, Sookie's roommate Amelia turns fellow witch Bob into a black cat during a night of wild sex.
- In The Thief of Bagdad, Abu the thief is changed into a dog by the wicked Jafar. Curiously, he adjusts rather well to his new life, accompanying his blind friend as a dog guide.
- In Buffy the Vampire Slayer, Amy, the witch, turns herself into a rat to escape an angry mob. This is on the involuntary list because she can't change herself back - as a rat, she has no powers. Amy first used her rat spell in an earlier episode on Buffy, which she later reversed.
- After witnessing this, Willow and Buffy try to frighten the mob into letting them go.
Buffy: Yes! You will all be turned into vermin. And some of you will be fish! Yeah, you in the back will be fish!
- One of Sam's leaps on Quantum Leap was into a chimp at NASA.
- However, it should be noted that Sam leaps into people's auras, not their bodies, so all the other characters see a completely different character. Sam can, in fact, stand perfectly upright in the episode, but after a scientist remarks that this is unusual for a chimp he spends the rest of the episode hunched over.
- One of the films shown on Mystery Science Theater 3000, "Jack Frost", was a bizarre pastiche of nearly every Fairy Tale Trope imaginable. In one of the many plot threads, the hero is turned into a bear - and he spends nearly the entire first half of the movie complaining loudly about this.
- Merlin had Freya, the Druid girl cursed to transform into a panther, albeit a winged one, every night at midnight.
- Calvin and Hobbes happily plays with the Cursed with Awesome aspect of this Trope at least twice, via Calvin's Transmogrifier. In one story, Calvin is turned into an owl and isn't pleased - until he remembers that owls don't go to school and so he and Hobbes can play in the woods all day. And then, next morning, he learns that the effects of the Transmogrifier wear off overnight. At the end of the story arc where Calvin clones himself several dozen times, he ends up transforming the clones into worms. And their immediate reaction, rather than being seriously upset, is "Cool! Look at us! Let's go gross someone out!"
- In Bionicle, Metus is transformed into a snake by the Mask of Life.
- Vivisector: Beast Within deals with Doctor Moreau-like half-human animal cyborgs, but there's also hints that their creators also did something to the game's protagonist as a kid, which manifest during the events of the game.
- Glenn the Frog of Chrono Trigger was transformed by the Big Bad. Given the some of Frog's skills explicitly take advantage of his new shape (water magic, grabbing enemies with his tongue, twenty-foot leaps,) this falls square into Cursed with Awesome.
- Mario & Luigi features an early game boss fight with a dragon that hatched from a giant egg. After defeating the dragon, it turns back into main character Prince Peasley, who reveals that Cackletta turned him into the dragon and trapped him inside the egg to get him out of their way.
- In the adventure game Loom, the protagonist's mother along with the guild elders are transformed into swans.
- In Quest for Glory I, Baba Yaga turns you into a frog, and the Dryad will turn you into a white stag if you offend her.
- In The Order of the Stick, Vaarsuvius is temporarily changed into a lizard.
- Zoe from Sluggy Freelance is in something of a grey area between voluntary and involuntary shapeshifting. The magic tattoo on her neck causes her to transform into a camel whenever someone says "shupid" near her, and it changes her back when someone says "kwi." Technically, Zoe could say "shupid" and turn herself into a camel, but this is pretty unlikely since she doesn't like transforming and, in camel form, she can't say the magic word to change back.
- She did it once, when she needed to hide fast and a random camel in a closet wouldn't raise eyebrows.
- In Kevin and Kell, the portal from Earth to Furth transforms humans into appropriate animals. Except Martha, when she was hiding in a lead-lined barrel.
- An apparent running gag in Electric Wonderland involves Aerynn turning NJ into a random animal whenever she needs help protecting herself and/or their teammates.
- In El Goonish Shive, Dan once turned Melissa into a cat in a filler strip (which got carried over into a later filler strip).
- In an April Fools strip, the cast was turned into cats at one point.
- All four members of Panthera can turn into big cats. Useful enough in itself, but they can also use Elemental Powers while transformed.
- An interesting example happens in Crimson Flag, where the normally anthropomorphic fox characters are turned into normal foxes. This is more going from a Petting Zoo Person to a normal animal.
- The entire basis for the Paradise setting is the involuntary (and invisible) transformation characters go through into Funny Animals.
- Professor Crow from SCP Foundation was turned into an intelligent dog, presumably by a lab accident.
- Jackie Chan Adventures features the Monkey Talisman which allowed the user to transform any object (living or not) into any animal (except transforming stone or rocks would create animal statues instead) and back again. Whether voluntary or not usually depended on the situation.
- American Dad's Klaus is an East German Olympic ski jumper, semi-permanently placed in the body of a goldfish. Apparently, the fish got his body in the deal, but couldn't use it.
- The Fairly OddParents: Cosmo and Wanda frequently turn into animals to disguise themselves to keep up the Masquerade. No one seemed to care or even notice that their fur/plumage is green and pink.
- One episode had Timmy trading brains with a dog, only to find himself unable to change back, since the fairies couldn't speak Dog.
- Totally Spies!: Clover gets turned into a Catgirl in one episode.
- In The Spectacular Spider-Man, biogeneticist Curt Connors pays the price for using himself as a guinea pig for a limb-regenerating formula made from genetically modified lizard DNA. He regains his right arm, but then transforms into the Lizard, an unthinking humanoid reptile. He only returns to normal after Spider-Man force-feeds him an antidote, losing the new arm in the process.
- Even though the title characters don't count, in the 80's Teenage Mutant Ninja Turtles cartoon, April O'Neil had undergone a few involuntary transformations, including a Catgirl and a Fish People.