History Main / SuperPoweredAlterEgo

When the superpowered side is evil, then it is, rather unsurprisingly, the subtrope SuperPoweredEvilSide. This trope itself is the subtrope of SharingABody.

'''[[ComicBook/TheMightyThor Thor]]:''' No! I don't even like the Hulk. He's all like, "''Smash, smash, smash!''" I prefer you. ''But'' if I'm being honest, when it comes to fighting evil beings, he is very powerful and useful.\\

** HilarityEnsues whenever accidental transformations happen (it's set off by his 'heart pounding' in connection with the girl he likes), especially at school. Occasionally it will be Daisuke in charge of Dark's body, but when things get really sticky is when Dark is running things but looks like Daisuke.

* Aurora and Jean-Marie of ComicBook/AlphaFlight. Jean-Marie is shyer and Aurora is more butt-kicking, though to what degree each has these traits is DependingOnTheWriter.
* Similar to the Mighty Thor example, one time Rick Jones and ComicBook/{{Captain Marvel|MarvelComics}} were united by negabands, and only one could exist in the "real world" at a time, the other being transported to the Negative Zone. This meant you had a teenager apparently transforming into an older, wiser superhero named Captain Marvel. Yes, he ''did'' [[ShoutOut say 'shazam' when switching once]]. The writer, Roy Thomas, intentionally made the relationship between the two into a reference to the Distinguished Competition's [[ComicBook/{{Shazam}} Captain Marvel]]/Billy Batson relationship. How Marvel's lawyers explained it to DC is a mystery.

** In [[ComicBook/MsMarvel1977 the 1970s]] Comicbook/CarolDanvers (eventually Captain Marvel herself), would be replaced by a Kree alter ego with noticeably shorter hair and a completely different personality when she transformed to ComicBook/MsMarvel.
* Johnny Blaze, the first Comicbook/GhostRider, was like this, originally being possessed by a demon when in his Rider form. Danny Ketch, the second Ghost Rider, also had shades of this but his was the ghost of a distant ancestor seeking vengeance. Then both of them were retconned to have their powers be angelic in nature with it zig-zagging back and forth if they had control over the powers or if the powers came with another personality.

* [[ComicBook/{{Shazam}} Captain Marvel]] is the Superpowered Alter Ego to 10-year-old audience surrogate Billy Batson. In UsefulNotes/TheGoldenAgeOfComicBooks they were definitely separate personalities. Nowadays, however, after ''ComicBook/CrisisOnInfiniteEarths'', Marvel is a SuperMode of the same child personality who acts often in a very childlike and innocent way, but there is still some noticeable change due to the addition of the Wisdom of Solomon to the character.

* ''Manga/SonicTheHedgehog1992'': The titular superfast hedgehog is the alterego to the [[OrdinaryHighSchoolStudent ordinary elementary school student]] Nicky who transforms whenever he's filled with self-doubt, [[AlternateIdentityAmnesia and forgets everything between the transformation and his return to normal]].

* ''LightNovel/KyoKaraMaoh'' has Yuuri's Demon King side, which possesses the ability to actually use the demon magic that's his by birthright. He only comes out when Yuuri is really upset by some form of injustice.

* In ''WesternAnimation/TurningRed'', this is {{Downplayed}}. Mei is less inhibited when she is the red panda.

* ''Series/{{Heroes}}'' has a couple of characters with a power-dependent personality disorder, such as Niki/Jessica. Niki/Jessica depicted the switch between the two with the tropes of Dissociative Identity Disorder ''a la'' Film/PrimalFear,Film/TheThreeFacesOfEve and Film/Sybil, aside from a brief flirtation with the idea that this was a twist on genuine D.I.D. with Jessica being the ghost of Niki's sister.

* Sort of used in ''Manga/CardcaptorSakura'' with Yukito and Yue; Yue's a magic-using WingedHumanoid, while Yukito is his "false form" that (presumably) Clow created for Yue to hide in while waiting for the Final Judgment. Besides that, Yukito is a normal teenage boy who is unaware of his superpowered true form.
* ''Manga/BirdyTheMighty'': Tsutomu can't use the powers of Birdy, even though it's technically her body, but they can communicate and switch with a moment's notice (without invoking a HenshinHero) once they've agreed they need to work together. Sometimes though, Birdy just steals him away when she needs to run off to do her work.

* ''LightNovel/KyoKaraMaoh'' has Yuuri's Demon King side, which possesses the ability to actually use the demon magic that's his by birthright. He only comes out when Yuuri is really upset by some form of injustice.
* [[SubvertedTrope Subverted]] In Part 5 of ''Manga/JoJosBizarreAdventure''. [[spoiler:Doppio's alter ego is Diavolo, who possesses the stand [[CulturalCrossReference King Crimson.]] Doppio is not aware of his alter ego, and can only communicate with Diavolo at certain times, as he believes he is a different person. While Doppio himself does not possess another stand, he can still use King Crimson's 'Epitaph' ability. It allows him to [[CombatClairvoyance see 10 seconds into the future]] and react accordingly.]]
** [[spoiler:The details of Doppio's life are left mostly ambiguous, but Polnareff speculates that it's a case of multiple personalities. Some fans believe that Doppio and Diavolo are [[TwoBeingsOneBody two souls in the same body]], which would better explain [[EyeColourChange Doppio's eyes at birth]], and the events of [[FreakyFridayFlip Chariot Requiem.]]]]

* Creator/DCComics' [[ComicBook/{{Etrigan}} The Demon]]

[[AC:Marvel]]
* ''ComicBook/TheMightyThor'': Thor, at first, didn't have a conventional secret identity. Rather, he exchanged places with the mortal Donald Blake, much like DC's Captain Marvel (above). While this has largely fallen by the wayside in favor of Thor lacking a SecretIdentity entirely, some writers bring Blake back for a time (such as during Walt Simonson's run), but it never lasts long.

* Creator/MarvelComics' ComicBook/{{Sleepwalker}}.

* Aurora and Jean-Marie of ComicBook/AlphaFlight. Jean-Marie is shyer and Aurora is more butt-kicking, though to what degree each has these traits is DependingOnTheWriter.
* Johnny Blaze, the first Comicbook/GhostRider, was like this, originally being possessed by a demon when in his Rider form. Danny Ketch, the second Ghost Rider, also had shades of this but his was the ghost of a distant ancestor seeking vengeance. Then both of them were retconned to have their powers be angelic in nature with it zig-zagging back and forth if they had control over the powers or if the powers came with another personality.

* ''ComicBook/JaneFosterValkyrie:'' Jane turns into Valkyrie, who has a different physique (Valkyrie's hair is longer, while Jane's is still short while she recovers from chemotherapy). However, while Valkyrie does share much of the same personality as Jane, she also has different attitudes (she likes Jane's weird co-worker in the morgue) and knows stuff Jane has no way of knowing.

* The titular ''Literature/CaptainUnderpants'' is a FlyingBrick in his superhero identity thanks to him drinking "Super-Power Juice". As his normal alter-ego Mr. Krupp, he's just an angry fat guy who doesn't demonstrate superpowers due to his identity being a product of [[HypnoFool botched hypnosis]] and presumably not knowing about his powers.

* One of the villains in ''TabletopGame/GURPSSupers: International Super Teams'' is the Void, a young woman suffering paranoid delusions, who transforms into a living black hole which is equally paranoid but more inclined to get angry about it. Maria does not remember what she does as the Void, and their shared paranoia means they hate each other as much as they do everyone else.

* In ''VideoGame/TheLegendOfZeldaALinkToThePast'', Ganon functions as Agahnim's super-powered self, as Ganon's powers seem to be limited in that form.

* A downplayed inversion in ''Webcomic/ElGoonishShive'': Elliot is still the same person when he becomes [[SuperGenderBender Cheerleadra]], however she has three secret identity forms, all of which ''do'' alter their personality slightly -- one is mild mannered, one is angsty, and one is a partier. She can override this if she concentrates.

* In ''Franchise/MastersOfTheUniverse'' He-Man looks somewhat different from Prince Adam, but they seem to be basically the same person. The same cannot be said for Cringer's transformation into Battle Cat, where the CowardlyLion becomes a fearless [[HorseOfADifferentColour riding tiger]] who seems rather contemptuous of his alter ego.
* The ''WesternAnimation/TheAvengersEarthsMightiestHeroes'' version of the Hulk really takes this all the way. Hulk and Banner are definitely two different people and can talk to each other. As you can imagine, the Hulk is not a terribly good listener... but this incarnation of the Hulk is more sapient than most other versions and can be more reasonable than you would expect.

* The eponymous character(s) of ''Anime/YuGiOh'' is/are this; upon solving the [[AncientArtifact Millennium Puzzle]], Yugi Moto becomes host to the soul of an ancient unnamed pharaoh, who apparently is even better than Yugi is at children's card games. The pharaoh also looks [[InexplicablyIdenticalIndividuals almost exactly like Yugi]], but is slightly taller and more mature. While not super-powered per se, the 3-5000 year old pharaoh has an almost [[GambitRoulette supernaturally]] good grasp of the [[TheStrategist strategy]] of [[XanatosSpeedChess gaming]], and confidence to match. Oh, and he can [[MindRape attack people's minds]] with his [[ThirdEye forehead eye]].

* [[SubvertedTrope Subverted]] In Part 5 of ''Manga/JoJosBizarreAdventure'', [[spoiler: Doppio's alter ego is Diavolo, who possesses the stand [[CulturalCrossReference King Crimson.]] Doppio is not aware of his alter ego, and can only communicate with Diavolo at certain times, as he believes he is a different person. While Doppio himself does not possess another stand, he can still use King Crimson's 'Epitaph' ability. It allows him to [[CombatClairvoyance see 10 seconds into the future]] and react accordingly.]]

* DC Comics' ''ComicBook/TheCreeper'', who supposedly inspired ''WesternAnimation/{{Freakazoid}}'' (see below).

* ''Film/Venom2018'': When Eddie bonds with an alien symbiote that is alive it turns him into a muscle tall black man with a mouth full of sharp teeth and white milky eyes who is otherwise a heroic man.

* [[NonPoweredCostumedHero The Blue Spirit]] from ''WesternAnimation/AvatarTheLastAirbender'' inverts this by forgoing the ElementalPowers that he uses under his SecretIdentity.

->'''[[ComicBook/IncredibleHulk Banner]]:''' If I turn into the Hulk, I am never gonna come back again. And you don't care....\\

* ''ComicBook/TheMightyThor'', at first, didn't have a conventional secret identity. Rather, he exchanged places with the mortal Donald Blake, much like DC's Captain Marvel (above). While this has largely fallen by the wayside in favor of Thor lacking a SecretIdentity entirely, some writers bring Blake back for a time (such as during Walt Simonson's run), but it never lasts long.

* The Comicbook/IncredibleHulk centers around a human who transforms into the powerful Hulk. The Hulk is portrayed as being an independent entity, and the extent to which Hulk and Banner share perceptions and experiences changes depending on the author. Some authors depict Banner as being aware of the Hulk's actions, but others do not. Some authors, such as Peter David, have attempted to combine Hulk's various personalities but these never last long. More recently, there were "team ups" between Hulk and Banner where their mental perspectives aligned for various reason, letting Hulk and Banner switch at will of the one "driving" but not combining.

** In the 1970s Comicbook/CarolDanvers (eventually Captain Marvel herself), would be replaced by a Kree alter ego with noticeably shorter hair and a completely different personality when she transformed to ComicBook/MsMarvel.

** Played with, at least in the [[Manga/YuGiOh original manga]]. One of the themes of the story is that Yugi is stronger than he thinks, being able to surpass his counterpart in some ways (for example, in terms of morality); in the end, [[spoiler: it's demostrated through the Ceremonial Battle he's able to surpass Yami in every way, including games.]]

* Rich Burlew (of ''Webcomic/TheOrderOfTheStick'' fame) created a base class, the [[http://www.giantitp.com/forums/showpost.php?p=9623431&postcount=9 Champion]], that applies this trope to [[TabletopGame/DungeonsAndDragons D&D 3.5]].

* Similar to the Mighty Thor example, one time Rick Jones and ComicBook/CaptainMarVell were united by negabands, and only one could exist in the "real world" at a time, the other being transported to the Negative Zone. This meant you had a teenager apparently transforming into an older, wiser superhero named Captain Marvel. Yes, he ''did'' [[ShoutOut say 'shazam' when switching once]]. The writer, Roy Thomas, intentionally made the relationship between the two into a reference to the Distinguished Competition's [[ComicBook/{{Shazam}} Captain Marvel]]/Billy Batson relationship. How Marvel's lawyers explained it to DC is a mystery.

* A downplayed inversion in ''Webcomic/ElGoonishShive'': Elliot is still the same person when he becomes [[SuperpoweredGenderBender Cheerleadra]], however she has three secret identity forms, all of which ''do'' alter their personality slightly -- one is mild mannered, one is angsty, and one is a partier. She can override this if she concentrates.

* A downplayed inversion in ''Webcomic/ElGoonishShive'': Elliot is still the same person when he becomes Cheerleadra, however he has three secret identity forms, all of which ''do'' alter his personality slightly -- one is mild mannered, one is angsty, and one is a partier. He can override this if he concentrates.

* Diana Prince never exhibits superpowers until she transforms into Wonder Woman. The trope is somewhat averted since the source of Wonder Woman's powers in Man's World is her belt. In season one we see a few examples of her belt being taken away and her losing her powers but this never happens in season two or three.

* In the "Supertoon" setting for ''TabletopGame/{{Toon}}'', one of the sample characters is Kate/Hotwheels, a penguin who becomes a skateboarding speedster iguana with a noticably different personality. Hotwheels thinks Kate is a "loser".