[[quoteright:150:[[Webcomic/PennyArcade http://static.tvtropes.org/pmwiki/pub/images/cit_penny_arcade_a_gabe_is_fine_too.jpg]]]]
[[caption-width-right:150:[[http://www.penny-arcade.com/comic/2007/08/31 Apparently]], [[MemeticMutation a cat is not fine]], either.]]

->''"Ford, you're turning into a penguin. Stop it."''
-->-- '''Arthur Dent''', ''Literature/TheHitchhikersGuideToTheGalaxy1''

A character is transformed into an animal, either completely or {{partial| transformation}}ly (as in TwoBeingsOneBody). The defining quality for this trope is whether their transformation was {{voluntary| shapeshifting}} or [[InvoluntaryShapeshifting not]]:

* There are many characters whose ability to transform into animals is a special power. Several of these are [[VoluntaryShapeshifting 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. OurWerebeastsAreDifferent covers werebeasts.

* Others are characters [[InvoluntaryTransformation unwillingly transformed]] into animals, usually as a punishment ([[KarmicTransformation ironic]] or otherwise) or {{curse}}, more often than not by the [[BlackMagic dark magic]] of the BigBad. 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 CursedWithAwesome 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 FreakyFridayFlip, leaving the animal's mind trapped in the human character's body (where HilarityEnsues). 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 [[TheMindIsAPlaythingOfTheBody 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 unhygienic 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}}, [[TotallyNotAWerewolf 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 [[SwanLake swan maidens]] or Literature/TheFrogPrince? In fact, Animorphism is OlderThanFeudalism, with ''Literature/TheOdyssey'' describing Circe turning Odysseus' sailors into pigs.

See also BalefulPolymorph, from which this is the consequence. Contrast with HumanityEnsues, the rarer inverse of animals transforming into humans.

Not to be confused with the SlidingScaleOfAnthropomorphism. See also PettingZooPeople. If this character is a superhero or supervillain, then they are an AnimalThemedSuperbeing.

Not to be confused with [[http://en.wikipedia.org/wiki/Anamorphism anamorphism]], [[http://en.wikipedia.org/wiki/Anamorphic_lens either kind]].
----
!!Examples of Voluntary Animorphism

[[foldercontrol]]

[[folder:{{Anime}} and {{Manga}}]]
* All familiars, and [[WeaselMascot Yuuno]], in ''MagicalGirlLyricalNanoha''.
* Ichigo of ''TokyoMewMew'' is a borderline case. The intended effect of her cat genes is the ability to voluntarily transform into a CatGirl; however, as her cat DNA starts to overtake her human DNA, she starts involuntarily 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 voluntarily, but only for a limited time.
* Yoruichi in ''Manga/{{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).
* ''Manga/OnePiece'' has the Zoan variety of [[PowerUpFood 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 a living being and their corresponding animal's intelligence, and can also transform into the animal itself, a hybrid (in the absence of a better word) or their "original" object form.
** If an animal eats a Zoan fruit corresponding to its own species it becomes [[EnlightenmentSuperpowers enlightened]].
* Early in the series, Kotaro of ''MahouSenseiNegima'' with his powers sealed revealed the ability to become a small puppy. [[spoiler:Later events show that he can, at full power, become a [[SuperMode Super-Powered wolf.]]
* ''AiToYuukiNoPigGirlTondeBuurin'' is about a [[MagicalGirlWarrior warrior]] style MagicalGirl (think ''Franchise/SailorMoon'', ''TokyoMewMew'', or ''PrettyCure'') 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 OneHundredAndEight of them she can become a human superheroine instead.
* Essentially the entire point of ''Manga/PlusAnima''.
* In ''Manga/RuinExplorers'', 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.
* Anime/{{Pokemon}} has an episode in the Johto League saga wherein [[TheHero 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, [[spoiler:Ash is turned into a Pikachu, which is affectionately [[FanNickname nicknamed Ashachu]]]]. It launched a hundred FanFic sequels when that happened.
* Rumiya and Ryo-Ohki in ''PrettySammy''.
* Some fairies in FairyNavigatorRuna have animal forms as well as human ones.
* Kars from ''JojosBizarreAdventure'' can do this after becoming the UltimateLifeform. He can do this because his cells contain the DNA of every species of animal, insect and even plant, on Earth and can manipulate said cells to transform his whole body or just parts of it into entire animals or just a single part of said animal.
[[/folder]]

[[folder:Comic Books]]
* Snowbird from ''ComicBook/AlphaFlight'' 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 [[GrowingUpSucks when she lost her virginity]], but she still uses Arctic creatures as a preferred style.
* Changeling--formerly Beast Boy--from Comicbook/TeenTitans. Like his cartoon counterpart, he can turn into a green version of any animal (though he can't turn into larger animals without [[ShapeshifterBaggage strain]]). But unlike the show, he can speak in any form. This is because he's not ''limited'' to turning into animals, it's just his style.
* Viktor Romanov in ''NikolaiDante'' can turn into a giant eagle due to his weapon crest.
[[/folder]]


[[folder:Fan Works]]
* In ''FanFic/TheSecretLifeOfTheBackyardKids'', Tiffany transforms into a giant cat, and since Jorge is a SquishyWizard, he calls his nanny and she tells him to transform into a panther. He not only does just that but does a ShoutOut to MichaelJackson.
* In ''FanFic/FriendshipIsOptimal'', humans are transformed into a pony upon [[BrainUploading uploading]] to Equestria.
* In ''FanFic/DiariesOfAMadman'', Nav gets turned into a pegasus several times by the shapeshifting spell, but he hates every second of it.
* TD experiences being turned into a pony several times in the various ''FanFic/TheNonBronyverse'' stories (not all of which are canon). The AU story ''TD the Alicorn Princess'' is the biggest example, when he ends up trapped in the form of a female alicorn.
[[/folder]]

[[folder:Literature]]
* Daine in Creator/TamoraPierce's ''Literature/TheImmortals'' quartet is a shapeshifter thanks to her WildMagic. 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 [[AWizardDidIt 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 ''Literature/{{Animorphs}}''. (The other 2/3 are AlienInvasion and RagtagBunchOfMisfits.) Also the TropeNamer
* Several characters in the ''Literature/HarryPotter'' series (such as Professor [=McGonagall=] and Sirius Black) are "animagi", who can transform into specific animals ([=McGonagall=] becomes a cat, [[MeaningfulName 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.
** Hermione Granger turns into a CatGirl after mixing the wrong hairs in [[CoverIdentityAnomaly a Polyjuice Potion]]. Hilarity Ensures, to Moaning Myrtle.
* Wizards in Creator/UrsulaKLeGuin's ''Literature/{{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 [[ShapeshifterModeLock 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 Series/{{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 ''Literature/{{Caretaker}}'' Trilogy are {{Half Human Hybrid}}s of some sort, but the only one shown to actually be capable of turning into the animal whose traits he borrows is Colonel [[MeaningfulName Aranha]]. [[spoiler:For those who didn't get the [[MeaningfulName Meaningful Portuguese Name]], he turns into a gigantic tarantula.]]
* In ''Literature/TheThiefOfAlways'', victims of the BigBad turn into [[spoiler:creepy, giant fish when their souls are removed]]. [[BodyHorror It's a gradual process]].
* The Were Hunters in Sherrilyn Kenyon's ''Literature/TheDarkHunters'' series were created by a king using his children, animals, and MagicGenetics to create {{Shapeshifting}} progeny.
* In the ''Literature/{{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 ''TheWindOnTheMoon'', 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 BondCreature that is some kind of animal bear, wolf, hawk...) some can turn into the form of any Lir they want.
* In Rick Riordan's ''Literature/TheHeroesOfOlympus'' series Frank Zhang a demigod son of Mars can be anything. According to Mars this means anything within reason, any living animal. [[spoiler: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 ''Literature/TheLastDove'' can (somewhat) voluntarily shapeshift.
* In the ''Literature/NightshadeTrilogy'', the Guardians can turn into wolves at will.
* Hoole in ''Literature/GalaxyOfFear'' is of a shapeshifting species but, while Shi'ido are able to turn into anything at will, he only ever takes the shapes of different sentient species - Wookiees are a favorite - or animals, rather than ever staying with his default form and lengthening his arms, say. Though he ''is'' able to speak Basic while Wookiee-shaped, which real Wookiees can't do.
* ''Literature/TheDresdenFiles'': One of the many things [[FunctionalMagic magic]] can do. Mainly used by Billy's {{Werewolf}} gang, for combat applications.
* Simon is turned into a rat in [[Literature/TheMortalInstruments City Of Bones]]
* [[Literature/{{Reckless}} The Mirrorworld Series]]: Fox, who prefers her animal form [[spoiler: until she [[GreenEyedEpiphany sees Jacob kissing Clara]]]].
* ''Literature/AFantasyAttraction'' has Mr. Smith accidently transforming people into [[spoiler:baby animals with his [[MagicWand spork]]]].
* ''Literature/SpectralShadows'' has this when Christine gets turned into an anthro fox via Sir Jon's SoundChaser.
[[/folder]]

[[folder:Live-Action TV]]
* ''Series/{{Manimal}}'' has a main character with transformation into animals as a special ability.
* In ''Series/TrueBlood'' 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 an exception: each person has an animal that they feel comfortable with, and can transform into it at any time without having to see a real example. The ability is passed from generation to generation.
* The TV Miniseries version of Literature/{{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.
* ''Series/MythQuest'' has the protagonists going into multiple myths. Naturally, this happens.
** Loki turns himself into a bird in "Hammer of the Gods"
** In "Red Wolf's Daughter", the spirits of Eagle, Badger, and White Buffalo are summoned. All take human form.
[[/folder]]

[[folder:Pinball]]
* Done in the "Metamorphosis" illusion from ''Pinball/TheatreOfMagic'', where the magician turns into various animals, such as a dove, a tiger, or a cobra.
[[/folder]]

[[folder:Tabletop Games]]
* The ''TabletopGame/NewWorldOfDarkness'' 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.
** Almost every type of supernatural creature in the TabletopGame/NewWorldOfDarkness is capable of shapeshifting into an animal by one means or another.
*** [[TabletopGame/ChangelingTheLost Changelings]] have the Contracts of Fang and Talon
*** [[TabletopGame/GeistTheSineaters Sin-Eaters]] have the Primeval Caul
*** [[TabletopGame/MageTheAwakening Mages]] have Life magic.
*** [[TabletopGame/PrometheanTheCreated Prometheans]] have the Metamorphism Transmutation
*** [[TabletopGame/VampireTheRequiem Vampires]] have the Protean Discipline
*** [[TabletopGame/WerewolfTheForsaken Werewolves]] are all inherently shapeshifters without having to learn a specific power.
* The ''TabletopGame/OldWorldOfDarkness'' games featured shapeshifting {{Splat}}s as well.
** ''TabletopGame/WerewolfTheApocalypse'' 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. Extinct races include the werebats, wereaurochs, and wereboars (though even they have rules for playing them).
** ''TabletopGame/VampireTheMasquerade'' 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).
** ''TabletopGame/ChangelingTheDreaming'' 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 ''TabletopGame/{{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 ''TabletopGame/DungeonsAndDragons'' Barbarian-based [[PrestigeClass 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 others into harmless critters as per the second example of this trope.
* In ''NewHorizon'', 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.
[[/folder]]

[[folder:Toys]]
* 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.
[[/folder]]

[[folder:Video Games]]
* Druids in ''VideoGame/WarcraftIII'' could turn into the totem animal whose demigod they were devoted to.
** Druids in ''WorldOfWarcraft'' 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, Ysera 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 FridgeHorror.)
* Druids in ''VideoGame/DiabloII: Lord of Destruction'' can acquire the ability to turn into a werewolf, or the slightly-more-exotic werebear.
* Most Dragons in ''Franchise/FireEmblem'' 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.
** ''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.
** ''VideoGame/FireEmblemAwakening'' decides not only to return the Manakete system, but also create the Taguel, a weird hybrid of both Manakete and Laguz mechanics that use magic stones to turn into giant rabbits.
* In the ''VideoGame/{{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 ''VideoGame/BloodyRoar'' game series is based on this trope.
* Likewise ''VideoGame/EVOSearchForEden''.
* ''VideoGame/AlteredBeast'' has the {{werewolf}}, [[InstantAwesomeJustAddDragons dragon]], {{bear|sAreBadNews}} and [[MisplacedWildlife tiger]] forms. Also for the BigBad, he has a [[MisplacedWildlife rhinoceros form]].
* In ''VideoGame/TheLegendOfZeldaTwilightPrincess'', 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 ''VideoGame/TheLegendOfZeldaALinkToThePast'', 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.
* ''VideoGame/{{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 ''KingdomHeartsII'', one of the visitable worlds is the [[{{Disney/TheLionKing}} Pride Lands]]. While there, [[{{TheHero}} Sora]] is transformed into a [[{{KillerRabbit}} brown lion cub]] thanks to his clothes. Goofy and Donald are also transformed into, respectively, a tortoise and a bird... that can actually fly.
* On gaining the Transformation Staff, characters in ''VideoGame/FinalFantasyThe4HeroesOfLight'' can turn to and from animals at will (which becomes helpful and sometimes necessary because of AnimalTalk). Aire is a cat, Yunita a rabbit, Brandt a dog, and Jusqua... a chicken.
[[/folder]]

[[folder:Webcomics]]
* In ''Webcomic/ElGoonishShive'', 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.
* In {{Zoophobia}}, shapeshifters can change into different animals. Avians into birds, serpentines into snakes and so on.
[[/folder]]

[[folder:Web Original]]
* Kodotai, Bestiario, Manimal, and Menagerie from the ''GlobalGuardiansPBEMUniverse 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.
* [[LimyaaelsFantasyRants Limyaael]] has a rant on [[http://limyaael.livejournal.com/288509.html shapeshifters]], on [[http://limyaael.livejournal.com/290393.html shapeshifter societies]] and on [[http://limyaael.livejournal.com/47942.html blurring the distinction between the "human" part and the "animal part"]].
* In the Literature/WhateleyUniverse, Feral has the power to change into pretty much any predator mammal. There are also [[{{Werebeasts}} 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 ''DarwinsSoldiers'' was turned into a dragon for unspecified reasons.
** Professor Sehack from the rebooted Furtopia RP was turned into a Bengal tiger for unspecified reasons.
* ''RolePlay/WeAreAllPokémonTrainers'' has both examples:
** Upon entering one of the PMD universes, humans get forcibly transformed into Pokémon.
** A human wearing a human to Pokémon armband will get turned into the Pokémon they relate to most.
** Weremons tend to have involuntary transformations, but due to her enchanted Moon Stone Crewe can switch forms at will.
[[/folder]]

[[folder:Western Animation]]
* Beast Boy from ''WesternAnimation/TeenTitans'' 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 [[TransformationConventions various animals]]. Beast Boy is rendered only able to change into inanimate objects, with a lamp as his base form.
** In WesternAnimation/YoungJustice, Beast Boy also has this ability, presumably due to the blood transfusion from the shape-shifting Miss Martian. Though he can take any animals’ form, he goes with various primates most often, because they are his favourite animals. Since he was bitten by a monkey shortly after said blood transfusion, his default form is that of a green, stooped, tailed half-monkey boy.
* 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 ''WesternAnimation/JackieChanAdventures''. The owner can turn him/herself or others into any animal they can think of.
* WildKratts has this as the founding concept, in which the main characters can assume animal shapes using the AppliedPhlebotinum in order to get close to the real animals.
* Replicon from ''WesternAnimation/SkysurferStrikeForce'' can turn into various animals or even certain attributes of animals.
* In the first episode of the original ''[[WesternAnimation/TeenageMutantNinjaTurtles1987 Teenage Mutant Ninja Turtles]]'', Bebop and Rocksteady volunteer to let Shredder turn them into a warthog and rhino, respectively, to get revenge on the turtles for humiliating them.
[[/folder]]

!!Examples of Involuntary Animorphism

[[folder:{{Anime}} and {{Manga}}]]
* In ''TheCatReturns'', Haru is turned into a [[CatGirl humanoid cat]] so she will make a more suitable bride for the cat prince.
* In ''Manga/FullmetalAlchemist'', 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 ''DragonBallZ'' 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 ''LightNovel/BludgeoningAngelDokurochan'' 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 [[http://www.youtube.com/watch?v=EQD2yeX_P2k here]].
* One chapter of ''Manga/ToLoveRu'' and one chapter of ''ToLoveRuDarkness'' are devoted to this, Rito being turned into a dog and found/petted by Haruna in the first one, and [[IronicEcho Haruna being turned into a cat and found/petted by Rito]] in the second.
* Some characters in ''Manga/RanmaOneHalf'' are cursed to transform into animals when doused with cold water. We get to see a giant panda, a cat, a piglet, a goose and a yeti-bull-crane-eel-octopus hybrid. The degree of "involuntary" varies, though.
* In ''Anime/NegimaSecondSeason'' the spinoff series of ''MahouSenseiNegima'', Negi Springfield is turned into a "chupacabra" due to [[BrokenMasquerade revealing the existence of magic to most of the class during the final episode]].
[[/folder]]

[[folder:Comics]]
* {{Thor}} was turned into a frog once because of a curse by Loki.
* As mentioned above in WesternAnimation, the Lizard.
[[/folder]]

[[folder:Film]]
* ''Film/CatPeople'' has werecats who are the distant offspring of black leopards with their human worshipers. Transformation is invoked by [[DeusSexMachina carnal relations]].
* There are quite a few examples in {{Disney}} productions:
** Lampwick and the other boys partying on Pleasure Island literally [[TransformationTrauma make asses out of themselves]] in ''Disney/{{Pinocchio}}''.
** ''Disney/BeautyAndTheBeast'', obviously.
** In ''BrotherBear'', your spirit evidently takes the form of your totem animal (good news if your totem is an eagle, [[FridgeLogic 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. [[spoiler:Kenai eventually gets over his [[CursedWithAwesome 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 ''KimPossible'', 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.
** ''Disney/TheEmperorsNewGroove''
*** "Hey, I've been turned into a cow. Can I go home?"
** ''ThePrincessAndTheFrog''
** Merida's mother and brothers in Pixar's ''{{Brave}}''
* [[RockADoodle "Jeepers! I'm all furry!"]]
* The short story "TheFly" and its two movie adaptations are a high-tech and [[TransformationTrauma 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 ''Film/TheAlligatorPeople, The Ape Man, The Bat People, The Brooklyn Gorilla'', ad infinitum...
* Quite a few of the characters in ''Film/{{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 [[spoiler:she changes him back into a human later. A '''[[GenderBender female]]''' human! If that's not enough, she turns another [[HumanityEnsues 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 [[IAmYourFather 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.
* [[Film/MontyPythonAndTheHolyGrail She turned me into a newt]]!
** I got better!
* In ''Film/TheThiefOfBagdad'', 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 ''WesternAnimation/HelpImAFish'', the three main characters accidentally get turned into fish after drinking a potion made by [[AbsentMindedProfessor Professor MacKrill]].
[[/folder]]


[[folder:Literature]]
* One of the first stories of Creator/{{Ovid}}'s ''Literature/{{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 OlderThanFeudalism.
** The book also shows examples of VoluntaryShapeshifting and almost every other ShapeShifting trope - it ''is'' right in the title after all.
* 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.
* Creator/FranzKafka's ''Literature/TheMetamorphosis''; the protagonist has transformed 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 TheSookieStackhouseMysteries, Sookie's roommate Amelia turns fellow witch Bob into a black cat during a night of wild sex.
* ''Literature/TheDresdenFiles'': Using magic to transform someone else against their will is against the laws of magic, but possible. The [[{{Werewolf}} Loup-Garou]] from ''Literature/FoolMoon'' is subject to a hereditary curse which causes the afflicted to transform into a nigh-invincible wolf monster and go on a rampage during a full moon.
* The Librarian of ''Literature/{{Discworld}}'''s Unseen University was transformed into an orangutan early in the second book, ''Discworld/TheLightFantastic'', by an exceptionally powerful spellbook. (Books on magic are dangerous as they are, but this one belonged to the Disc's Creator) He has since come to enjoy his new state, as the prehensile toes make shelving a dream, and the muscles capable of unscrewing someone's head off. (Which [[BerserkButton he will do]] if you call him a [[IAmNotAWeasel monkey]]) The other wizards allow this because he's the only one who can run the library, and there's [[LoopholeAbuse no rule]] against an ape serving on the college council (and the wizards looked very hard for one).
** The Toad in the Tiffany Aching books is actually [[spoiler:a lawyer]] who got on the wrong side of a fairy godmother, and subsequently got on the right side of the Nac Mac Feegle. The Disc will never be the same again.
* ''Snow White and Rose Red'', a fantasy novel adaption of [[SnowWhiteAndRoseRed the fairy tale of the same name]], reveals this as the fate of a Faerie who loses their magical essence. Thus, when Hugh is robbed of his essence by humans seeking to master Faerie magic, he slowly and painfully turns into a bear over the course of a month. Furthermore, anyone who fully transforms gets unceremoniously dumped out of the realm of Faerie and banished. Hugh's curse serves as the conflict of the novel, and [[TheMindIsAPlayThingOfTheBody his loss of humanity]] as time passes in the bear's form becomes another source of problems.
* Magnus Bane from ''Literature/TheMortalInstruments'' can turn into a cat.
[[/folder]]

[[folder:Live-Action TV]]
* In ''Series/BuffyTheVampireSlayer'', 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!
* ''Series/{{Merlin}}'' had Freya, the Druid girl cursed to transform into a panther, albeit a winged one, every night at midnight.
* One of the films shown on ''MysteryScienceTheater3000'', "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.
* One of Sam's leaps on ''QuantumLeap'' 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.
* Happens twice on ''Series/MythQuest'', in different myths.
** Thor turns Váli into a wolf so he will attack his brother.
** Math and Gwydion turn Blodeuwedd into an owl as punishment for killing her husband.
* Series/{{Woof}}!, which features a kid who [[InvoluntaryShapeshifting involuntarily]] changes into a dog at times.
[[/folder]]

[[folder:Newspaper Comics]]
* ''ComicStrip/CalvinAndHobbes'' happily plays with the CursedWithAwesome 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. [[spoiler: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!"
** Another instance is he once used the Transmogrifier to turn into a tiger, which he ended up looking like a smaller version of Hobbes.
* ''ComicStrip/TheWizardOfId''.
-->'''Peasant:''' I want you to put a curse on my insurance man.
-->'''Wizard:''' Zooley-zooley-zat, your insurance man is now a rat!
-->''(Peasant answers his door to find an enormous rat standing there with paw outstretched.)''
-->'''Rat:''' Your premium is due...
[[/folder]]

[[folder:Toys]]
* In ''{{Bionicle}}'', [[spoiler:Metus is transformed into a snake by the Mask of Life.]]
[[/folder]]

[[folder:Video Games]]
* ''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 ''VideoGame/ChronoTrigger'' was transformed by the BigBad. 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 CursedWithAwesome.
* ''VideoGame/MarioAndLuigi'' 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 ''VideoGame/{{Loom}}'', the ultimate punishment tor Spellweavers -- "Transcendence" spell -- involves transformation into a swan.
** The manual explains how the protagonist's mother got transformed shortly after his birth.
** His foster mother gets transformed into an egg shortly after the game start (the spell went wrong). Later she hatches as an adult duck.
** Immediately after she becomes an egg, a swan appears and transforms into swans the whole village except the protagonist.
* In ''QuestForGloryI'', Baba Yaga turns you into a frog, and the Dryad will turn you into a white stag [[YetAnotherStupidDeath if you offend her]].
** One should [[TheManyDeathsOfYou expect nothing less]] from a {{Sierra}} game.
* Three cases of this happen in the ''JakAndDaxter'' series
** At the beginning of the first game, Daxter is turned into an ottsel after being knocked back into a pool of Dark Eco by accident. The plot of the game is to find a way to change him back into a human, though in the end, [[spoiler: he is forced to give up his chance to allow Jak to defeat the Big Bads]]. He has since accepted his new form.
** Near the end of the third game, [[{{LightIsNotGood}} Count Veger]] demanded that he'd be transformed into a Precursor when Jak is given the chance. [[spoiler: One [[TheReveal reveal]] later, he's stuck as an ottsel and at the mercy of Kleiver]].
** At the end of the third game, [[spoiler: Tess is turned into an ottsel when she wishes she had pants like the ones Daxter just got]].
* Thanks to her greed, Aire from ''VideoGame/FinalFantasyThe4HeroesOfLight'' gets cursed into a cat form.
[[/folder]]

[[folder:Webcomics]]
* In ''Webcomic/TheOrderOfTheStick'', Vaarsuvius is temporarily changed into a lizard.
* Zoe from ''SluggyFreelance'' 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 ''KevinAndKell'', the portal from Earth to Furth transforms humans into appropriate animals. [[spoiler:Except Martha, when she was hiding in a lead-lined barrel.]]
* An apparent running gag in ''Webcomic/ElectricWonderland'' involves Aerynn turning NJ into a random animal whenever she needs help protecting herself and/or their teammates.
* In ''Webcomic/ElGoonishShive'', Dan once turned Melissa into a cat in a filler strip (which got carried over into a later filler strip).
** In an AprilFools strip, the cast was turned into cats at one point.
* All four members of {{Panthera}} can turn into [[PantheraAwesome big cats]]. Useful enough in itself, but they can also use ElementalPowers while transformed.
* An interesting example happens in CrimsonFlag, where the normally anthropomorphic fox characters are turned into normal foxes. This is more going from a [[PettingZooPeople Petting Zoo Person]] to a normal animal.
[[/folder]]

[[folder:Web Original]]
* The entire basis for the ''{{Paradise}}'' setting is the involuntary (and invisible) transformation characters go through into {{Funny Animal}}s.
* Professor Crow from ''Wiki/SCPFoundation'' was turned into an intelligent dog, presumably by a lab accident.
[[/folder]]

[[folder:Western Animation]]
* ''WesternAnimation/JackieChanAdventures'' 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.
** Jade also suffered two additional transformations during the series, once turning into a cat person after being scratched by a magical artifact, and another time turning into a donkey due to a chaotic spirit.
* ''WesternAnimation/AmericanDad'''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.
* ''WesternAnimation/KimPossible'': Kim was turned into a monkey, and Ron was turned into a beaver (though not in the same episode).
* ''WesternAnimation/TheFairlyOddParents'': 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.
* ''WesternAnimation/TotallySpies:'' Clover gets turned into a CatGirl in one episode.
** In the Crossover Episode between ''WesternAnimation/TotallySpies:'' and ''WesternAnimation/MartinMystery:'' they all went through at least partial transformations into Yeti.
* In ''WesternAnimation/TheSpectacularSpiderMan'', [[EvilutionaryBiologist biogeneticist]] Curt Connors pays the price for using himself as a [[ProfessorGuineaPig guinea pig]] for a [[JustThinkOfThePotential limb-regenerating]] [[LegoGenetics formula]] made from [[GeneticEngineeringIsTheNewNuke genetically modified]] lizard DNA. He regains his right arm, but then {{transform|ation trauma}}s into the Lizard, an [[ReptilesAreAbhorrent unthinking humanoid reptile]]. He only returns to normal after Spider-Man force-feeds him an [[PowerNullifier antidote]], [[NoOntologicalInertia losing the new arm]] in the process.
* Even though the title characters don't count, in the [[WesternAnimation/TeenageMutantNinjaTurtles1987 80's Teenage Mutant Ninja Turtles cartoon]], April O'Neil had undergone a few involuntary transformations, including a {{cat| girl}} and a {{fish| people}}.
** And while the turtles themselves don't count, their master Splinter does, as the same ooze that turned them into humanoid turtles turned him, formerly a ninja master named Hamato Yoshi, into a humanoid rat.
* Baxter Stockman turns into a fly when entering a portal at the same time an actual fly does.
** The ooze does this in [[WesternAnimation/TeenageMutantNinjaTurtles2012 the 2012 series]]. It seems that the ooze turns a person into an animorphized version of whatever living thing (plants included) that they were last in contact with. (excluding mutants)
* ''WesternAnimation/BeastWars'' inverted a large part of the trope. Where most heroes use animal forms to become stronger, these Transformers use them to mainly protect themselves from local radiation, and can only spend limited time in the "human" (humanoid robot) form that has the real power: their [[MoreDakka guns]].
[[/folder]]
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