The Evil Doppelgänger is traditionally a MirrorUniverse counterpart. The double can also be the equivalent of ForWantOfANail: he/they represents what the hero or heroes could become, or may become.

Sometimes the evil double is a clone and may brood about how he's not a "real" person, just a hollow imitation of the original. If that happens, the clone tends to go mad and try to murder the original to take his place.

The evil doppelgänger is not to be confused with the original doppelgänger. This character is more like the EvilTwin. See also CriminalDoppelganger and EvilCounterpart.
!!Types of evil doppelgangers include:

[[AC:Anime & Manga]]
* The Copy Rockman/Copy Robot from ''Manga/MegaManMegamix'' is a good example. He's a copy of Mega Man that believes himself to be the real one and has his memories, but then he goes and tries to kill Dr. Wily. This helps to prove that he's not the original, due to the whole ThouShallNotKill thing. He's more powerful than the original, but has a defect that can overload and destroy him, guess what happens in the end. When Copy Rockman finds out he's a copy created by Wily, [[spoiler:in the end he commits a HeroicSacrifice to save everyone from Bass and his own destruction]].
* ''Anime/SonicTheHedgehogTheMovie'' had Metal Sonic act like this, that is until [[spoiler:his final moments]].
* ''Manga/MagicKnightRayearth'' had Nova, who apart from PointyEars (and a SlasherSmile...) looks a lot like Hikaru. [[spoiler:She's actually the personification of Hikaru's guilt and despair.]]
* Mewtwo from ''Anime/PokemonTheFirstMovie'' franchise may count. He does eventually do a HeelFaceTurn of sorts.

[[AC:Comic Books]]
* ''Franchise/{{Superman}}''
** Bizarro is an imperfect clone of Superman, but Bizarro may be considered as more of a victim himself as he's lacking in the intelligence department.
** Superman's actually ''evil'' counterpart is his MirrorUniverse double, Ultraman [[Series/{{Ultraman}} (no relation)]].
** Supes seems to collect these. There's also [[ Hank Henshaw, the Cyborg Superman]], whose body was destroyed by a solar flare, and rebuilt using Kryptonian technology. He blames Superman for the flare, and actually posed as the original Man of Steel for a time, going so far as to recreate Superman's own genetic makeup.
* One storyarc in Exiles had Mimic meeting the ForWantOfANail version, whereas Exiles Mimic accepted Xavier's offer of friendship leading him to become a much respected hero his evil version chose to reject it by spitting in Xavier's face instead, ending up a mass murderer who killed both Xavier and Magneto among others. He's redeemed by the end of the arc though.

* One of these is featured in the ''WesternAnimation/PhineasAndFerb'' fic [[ PnF: Stolen Identity]] though [[WhatHappenedToTheMouse the origins of said doppelganger are never properly explained]].
* Calvin gets one in Calvin's Quest, a story part of FanFic/TheOmniverseEvent. [[spoiler: Actually, it's his duplicate.]]

* ''Franchise/{{Godzilla}}'' has two: [[Film/GodzillaVsMechagodzilla Mecha Godzilla]] and [[Film/GodzillaVsMechagodzilla Space Godzilla]].

[[AC:Live-Action TV]]
* ''Franchise/StarTrek'', of course, has the MirrorUniverse, with evil beards and everything.
* Several characters of ''Series/TheFlash2014'' have villain counterparts on Earth 2. This includes Cisco (Reverb), Caitlin (Killer Frost), Ronnie (Deathstorm), and Cisco's brother Dante (Rupture).

[[AC:Video Games]]
* In the UsefulNotes/{{NES}} [[VideoGame/FelixTheCat Felix the Cat video game]], the boss of world 5 is an evil copycat of Felix toting a hat and gun. He isn't given a name or explanation for where he came from—not even the manual mentions him.
* In ''VideoGame/SaintsRowIV'' you have to face your character's evil doppelganger, who has an evil eyepatch and a goatee (even if your character is female).
* In ''Stranded Dreamscapes 2: The Doppleganger'' Alex's mirror twin Xela traps her in the mirror world and tries to take over her life.

[[AC:Web Comics]]
* In ''Webcomic/TheInexplicableAdventuresOfBob,'' Galatea is an emotionally unstable, sometimes dangerous clone of Molly, but it would be unfair to call her ''evil.'' [[ChaoticNeutral "Chaotic"]] though? [[WildCard Sure.]]
* In ''Webcomic/{{Whither}}'' [[spoiler: Frost takes Emelind's form for a while. How evil his motives were remains to be seen]].
* ''Webcomic/BrunoTheBandit'' has a variety called Dopplegangsters which are shapeshifters that can impersonate even non-humans like Bruno's micro-dragon sidekick.
[[AC:Western Animation]]
* Negaduck is ''WesternAnimation/DarkwingDuck'''s evil double from a Mirror Universe.
* ''WesternAnimation/RickAndMorty'': Evil Morty is, [[ExactlyWhatItSaysOnTheTin as the nickname implies]], an evil version of the second titular character and the infinite multiverse versions of him.