History Main / MirrorUniverse

* ''VideoGame/FireEmblemEngage'': This is one of the main ideas behind the "Fell Xenologue" [[DownloadableContent DLC]], as it essentially takes place in one where [[TheBadGuyWins Sombron wins]]. The Four Hounds, who are some of the main game's main villains, are the good guys and have opposite personalities to their mainline counterparts. There's also the royals, who also have opposite personalities to their mainline counterparts, like how [[TheEeyore Alcryst]] is egotistical, or how [[TheAtoner Ivy]] is a corrupt tyrant. It's mentioned that their retainers, who, although long dead at this point, had the opposite personalities as the main counterparts as well. For example, [[BizarreTasteInFood Chloé]] is said to have had a PlainPalate, [[AnimalLover Merrin]] is said to have hated animals, [[TeamChef Brunet]] is said to have been a LethalChef, etc. However, [[spoiler:It turns out that the royals are actually [[OurZombiesAreDifferent Corrupted]], so whether or not these are accurate depictions and descriptions of Alternate Elyos' inhabitants while they were still alive is up for debate.]]

The TropeCodifier is the ''Series/StarTrekTheOriginalSeries'' episode "[[Recap/StarTrekS2E4MirrorMirror Mirror, Mirror]]." In homage to this episode, it's common for an evil mirror equivalent to have a [[BeardOfEvil goatee beard]].

* The fan-made ''TabletopGame/Brighthammer40000'' campaign setting for the ''TabletopGame/Warhammer40000'' roleplaying games is largely a Mirror Universe, with some BizarroUniverse mixed in -- given [[CrapsackWorld the state of the normal universe]], it's a [[LighterAndSofter pretty nice place to live]]. There are exceptions, however. The Tau are ''exactly the same'' -- their new status as villains is simply because the rest of the universe now looks better, rather than worse, by comparison. The Tyranids are also the same -- they're mirrored in that they're now the threat another extragalactic faction is fleeing from, rather than being implied to be fleeing from an even worse extragalactic faction. While the Eldar are reversed in alignment as well, the makers took it to a logical conclusion: The Bright (Dark) Eldar were born in dire straits, and are fighting a losing war against their cruel brethren. The Slaan are a borderline exception, as well: They're much the same, but they're now villains as the setting replaces the mysterious-but-benevolent [[{{Precursors}} Old Ones]] of ''40k'' and ''TabletopGame/WarhammerFantasy'' with the twisted and horrifying Great Old Ones; being devoted servants to the Old Ones is now an unequivocally bad thing. The Deceiver (the worst of the extremely nasty C'Tan in {{Canon}}) is still completely evil, it's just that how he goes about it is reversed -- he's known as the Soothsayer, and rather than causing trouble with deception, he instead specializes in sharing dangerous and unpleasant truths and dispelling even harmless or necessary lies. The other C'Tan play this straight, though -- the Daybringer is flat-out benevolent, the Void Dragon is well-meaning but utterly alien and unaware of just how dangerous his knowledge can be in the wrong hands, and the Outsider is in a self-imposed exile due to emotional and mental scars from battling the Great Old Ones... but the Tyranids are heading toward his "prison" and ''no-one'' knows how that will turn out.

[[folder:Card Games]]
* There is a set of ''TabletopGame/MagicTheGathering'' involving a plane that transforms back and forth between its mirror opposites. Lorwyn is a bright, cheery world of eternal summer and daylight, filled with the stuff of whimsical fairytales. Then the world is abruptly transformed into Shadowmoor, stuck in perpetual twilight, and filled with the stuff of the Grimm brothers. Most inhabitants change with it, believing that they've always lived in whichever world it is (which could bring with it all kinds of metaphysical uncertainty about just how often the world changes its nature).
** Also, Time Spiral block revealed several, including a consistent one in which [[CatGirl Mirri]] instead of Crovax became the vampire evincar of Rath. Also the first male angel in Magic history.
* In the lore of TabletopGame/SentinelsOfTheMultiverse there's the Inverseverse, an alternate universe where everyone who's good is evil and everyone who's evil is good. And Anubis... is still kind of a jerk. Though in a different way. The Action Hero Stuntman and Ivana Ramonat Luminary variant cards are from this universe.
[[/folder]]

* In the HERO game ''TabletopGame/{{Champions}}'', a supplement describing various one-off AlternateUniverse concepts included a mirror universe, complete with ThePsychoRangers versions of the Champion superhero team.
* As a direct homage to DC's Crime Syndicate, the TabletopGame/FreedomCity setting for ''TabletopGame/MutantsAndMasterminds'' has a Mirror Universe (Anti-Earth) in which the city is called Empire City and the Freedom League is replaced by the Tyranny Syndicate.
* The fan-made ''WebOriginal/Brighthammer40000'' campaign setting for the ''TabletopGame/Warhammer40000'' roleplaying games is largely a Mirror Universe, with some BizarroUniverse mixed in -- given [[CrapsackWorld the state of the normal universe]], it's a [[LighterAndSofter pretty nice place to live]]. There are exceptions, however. The Tau are ''exactly the same'' -- their new status as villains is simply because the rest of the universe now looks better, rather than worse, by comparison. The Tyranids are also the same -- they're mirrored in that they're now the threat another extragalactic faction is fleeing from, rather than being implied to be fleeing from an even worse extragalactic faction. While the Eldar are reversed in alignment as well, the makers took it to a logical conclusion: The Bright (Dark) Eldar were born in dire straits, and are fighting a losing war against their cruel brethren. The Slaan are a borderline exception, as well: They're much the same, but they're now villains as the setting replaces the mysterious-but-benevolent [[{{Precursors}} Old Ones]] of ''40k'' and ''TabletopGame/WarhammerFantasy'' with the twisted and horrifying Great Old Ones; being devoted servants to the Old Ones is now an unequivocally bad thing. The Deceiver (the worst of the extremely nasty C'Tan in {{Canon}}) is still completely evil, it's just that how he goes about it is reversed -- he's known as the Soothsayer, and rather than causing trouble with deception, he instead specializes in sharing dangerous and unpleasant truths and dispelling even harmless or necessary lies. The other C'Tan play this straight, though -- the Daybringer is flat-out benevolent, the Void Dragon is well-meaning but utterly alien and unaware of just how dangerous his knowledge can be in the wrong hands, and the Outsider is in a self-imposed exile due to emotional and mental scars from battling the Great Old Ones... but the Tyranids are heading toward his "prison" and ''no-one'' knows how that will turn out.
** As listed in the Fan Works section above, inversions of the Literature/HorusHeresy are rather common among ''TabletopGame/Warhamemer40000'' fans.

** ''ComicBook/YoungJustice2019'' Issue #8 introduces the team's [[MirrorUniverse Earth-3]] counterparts: Amaxon Thunder for ComicBook/WonderGirl, Luthor-El for ComicBook/{{Superboy}}, Speed Zone for Impulse, Hack for Teen Lantern, Hex for Jinny Hex and Drake for Tim Drake. We never meet ComicBook/{{Amethyst|Princess Of Gemworld}}'s counterpart as she apparently overslept and missed the fight.

** ''ComicBook/SonicTheComic'' featured [[https://sonic.fandom.com/wiki/King_Sonic King Sonic]], hailing from a MirrorUniverse in which Sonic was the one who got caught in the explosion of the Retro-Orbital Chaos Compressor instead of Dr. Kintobor. As such, in the absence of Dr. Robotnik, this Sonic became the tyrant that sought to take over his universe's Mobius. He has all of Sonic's abilities with none of his redeeming qualities and even has his own [[SuperpoweredEvilSide Superpowered Good Side]] in King Super Sonic.

* One episode of ''WesternAnimation/Rugrats1991'' has Chuckie and Tommy thinking that they landed in "Mirror Land" when they flipped over a mirror. Thanks to a series of [[ContrivedCoincidence contrived coincidences]], HilarityEnsues.
* ''WesternAnimation/SouthPark'' parodied the ''Star Trek'' episode with their own Mirror Universe, from which visited an alternate Cartman. Exactly like the alternate Spock in "Mirror, Mirror", the alternate Cartman was bearded -- but being the moral opposite of the "real" Cartman, he was of course kind, soft-spoken, polite, and gentle. Hilariously, the show depicted the twins on screen at the same time with a [[StylisticSuck deliberately obvious]] SplitScreen effect. Later on, we see that Kenny is rich, Stan and Kyle are Cartman-level [[{{Jerkass}} Jerkasses]], and [[Music/IsaacHayes Chef]] is a skinny white insurance salesman.
* ''WesternAnimation/DarkwingDuck'' has the Negaverse[[note]] [[Manga/SailorMoon Not that one]] [[/note]] from which [[MultipleChoicePast one version of]] Darkwing Duck's EvilTwin Negaduck originates, where he evidently rules with an iron fist. Nega-Honker has the (regular) Tank's personality and morality while Nega-Tank has Honker's, the rest of the Nega-Muddlefoots and Nega-Launchpad are thuggish psychotic killers, and the Negaverse versions of the other four members of Negaduck's "Fearsome Five" are known as the "Friendly Four" until Darkwing Duck retrains them. Interestingly, despite being Negaduck's ward, Nega-Gosalyn has the same general morality as her prime universe counterpart (much like bearded Spock), but a reversed personality: whereas regular Gosalyn is a rough-and-tumble sports-loving TomBoy and BrattyHalfPint, Nega-Gosalyn is a sweet and obedient well-behaved [[PinkMeansFeminine pink-dress-wearing]] young lady.
* There's a mirror universe in ''[[WesternAnimation/CaptainNTheGameMaster CaptainN]],'' accessed by going through an actual mirror. Oddly it's not just characters' alignments that are inverted. For example, one lady is shown "doing laundry" by covering her clean clothes with dirt.
* In ''WesternAnimation/BatmanTheBraveAndTheBold'', Batman travels to one of these when the Red Hood, [[spoiler:an alternate version of the Joker]], needs his assistance. He seems to enjoy repeatedly punching out the alternate version of Green Arrow a little too much...
** There's an EvilCounterpart to the WesternAnimation/JusticeLeague called the Injustice Syndicate, which has evil counterparts of Batman (Owlman), ComicBook/BlueBeetle (Scarlet Scarab), ComicBook/GreenArrow (Blue Bowman), and ComicBook/RedTornado (Silver Cyclone) among others.
* The ''WesternAnimation/SWATKats'' episode "The Dark Side of the SWAT Kats" featured the titular team being warped to a dimension where their equivalents are evil (as is that of their ally, Deputy Mayor Callie Briggs). The universe wasn't entirely swapped, however - some major characters retained their 'correct' moral alignments. (There were other more subtle changes as well, such as the Enforcers using fixed-wing aircraft rather than helicopters.)
* ''WesternAnimation/MegasXLR'' has [[BadFuture a version of this]] in its two-part "Rear View, Mirror Mirror" storyline. In this timeline, main character Coop abandoned the titular Megas shortly after defeating the series' BigBad - losing his mind as boredom and battlelust sank in, culminating in the conquest of earth and several solar systems. Coop seems more offended at his alternate self being athletic and muscular (as opposed to...large) rather than evil, though.
* ''The World's Greatest WesternAnimation/{{Superfriends}}'' had such an episode, "Universe of Evil". Each of the Superfriends received an EvilMakeover (Aquaman with an eyepatch! Robin with a [[GoodHairEvilHair pencil mustache!]] Wonder Woman letting herself go!) [[http://superfriends.wikia.com/wiki/Super_Enemies See them here.]]
* ''WesternAnimation/BuzzLightyearOfStarCommand'' had as a minor villain the [[SarcasmMode imaginatively dubbed]] and yes, goateed, Evil Buzz Lightyear who came from a parallel universe that he had conquered. He's ''exactly'' as evil as Buzz is good. There are parallel versions of the other main characters, except none of them are evil, just jaded from being under Evil Buzz's thumb. Oh, and the inverted counterpart for Emperor Zurg? He works at a local diner.
* ''WesternAnimation/CodenameKidsNextDoor'' had one in which even the acronyms were reversed - the counterparts to the Delightful Children From Down The Lane were the Little Traitorous Dudes From Children's Defence, who opposed the iron grip of the Destructively Nefarious Kids, who were led by Numbuh -4, who had attained a goatee to make himself look even eviller. Fortunately, since the regular Numbuh 4 is brave to the point of recklessness and a strong physical fighter, Numbuh -4 was a coward and weakling. Also, Numbuh -86 was a sweet girly girl.
** Other differences include a dumb and weak-willed Numbuh -1, Numbuh -2 was also dumb but good at making jokes, Numbuh -3 is a bitch, and Numbuh -5 is a {{geek}}. Strangely, the LTDFCD still talk in unison like their main counterparts, though in [[SurferDude surfie accents]] and they still work for "Daddy", who, unlike Father, is an extreme worrywart who cares a lot for his kids.
* ''WesternAnimation/GIJoeARealAmericanHero'''s two-part episode "Worlds Without End" had several of the Joes traveling to a CrapsackWorld that bordered on this; while most of the alternate versions of G.I. Joe and Cobra were still morally similar to their counterparts in the regular universe, Cobra's having conquered the world made it the legitimate government of that world and G.I. Joe an enemy of the state. Also, in a bit of a twist, [[spoiler: the alternate Baronness was [[DatingCatwoman romantically involved]] with Steeler's counterpart before he was killed in action, and this was one of the stronger influences which persuaded Steeler to stay with her in her world at the end when most of his teammates returned to their own world. (A couple of the others also stayed with him to help revive G.I. Joe's resistance movement in that world.)]]
* ''WesternAnimation/TheRealGhostbusters'' episode ''Flip Side'' had Egon, Ray, and Peter end up in a flip dimension where ghosts are the natural populace and are menaced by humans. While there, they encounter ghostly versions of themselves called the Peoplebusters.
* ''WesternAnimation/HeyArnold'' had an episode where Arnold goes into the country to visit his weird cousin Arnie. All of the people he meets are counterparts of his friends, but they all appear in pairs, with each one displaying the attributes of the other's counterpart: Harold and Rhonda appear as Harry and Rhoda, with Harry being slim and fashion-conscious and Rhoda being a fat slob. Stinky and Phoebe are seen as Stumpy and Fifi, with Stumpy being intelligent and Fifi being simple-minded and Gerald and Sid appear as Gerard and Kid, with Gerard being the whiny one and Kid being cool. In the end, [[spoiler: it turns out that it was AllJustADream.]]
* ''WesternAnimation/SonicUnderground'' had the hedgehogs enter one where they were the tyrants and Robotnik was a Freedom Fighter. It ended with them [[HeelFaceTurn redeeming]] their evil counterparts. Strangely, there was no mirror version of Queen Aleena.
* ''WesternAnimation/Ben10Omniverse'': Ben 23 has a take on it, where the Ben there is a {{Jerkass}} who believes that all aliens (except his transformations) are evil. His RoguesGallery includes a Tetrax with a diamond BeardOfEvil. In the end, it turns out the BigBad was really Azmuth, trying to get back the Omnitrix from Ben (who he, with good reason, believed was abusing it), and Ben himself wasn't evil, just misguided. Since Tetrax was a good guy as well, the only real alliance difference was Seven-Seven (who worked for Azmuth and thus was also good).
** There's also Mad Ben (a ''Film/MadMax'' parody), Bad Ben (a PaletteSwap with black hair), Benzarro (from a ZombieApocalypse universe), Nega Ben (Ben as a {{goth}}), and No-Watch Ben ([[BadassNormal self-explanatory]]). All but the last were evil.
* ''WesternAnimation/SpaceStars'' had an episode with an alternate universe where ''WesternAnimation/SpaceGhost'''s counterpart was Space Spectre, a ruthless SpacePirate.
* The ''WesternAnimation/DangerMouse'' (2014) episode "Sinister Mouse'', DM meets his counterpart from a mirror universe called the Twistiverse, who is a master criminal in a red bodysuit. He is opposed by Danger Toad (Twistiverse Baron Greenback) and secretly works for [[spoiler: the evil genius Baron Penfold]]. Later episodes feature Twistiverse versions of other characters; "Twisted Sister" features a version of Professor Squawkencluck who is not only evil but, when Squawkie accidentally turns herself into a little girl, has turned herself into an old woman.
* ''WesternAnimation/{{Rupert}}'' featured a rather literal example of this trope in "Rupert in Mirrorland", where Rupert Bear's friend the Professor uses an invention of his to reveal that inside all the mirrors was a world where everyone's reflections are sentient beings. The Professor's reflection is shown to be evil, but it's only because of a side effect of the Professor's experiment and the reflections of everyone else are as nice as their Nutwood counterparts.

** The show had an episode where the main four get teleported to an alternate universe where Kaeloo is usually a huge monster and transforms into a cute little girl when angry, Stumpy is a genius, and Quack Quack and Mr. Cat have each other's personalities and traits. [[spoiler: The episode turns out to be [[AllJustADream a dream]] [[{{Cloudcuckoolander}} Stumpy]] had, the events of which he is narrating to Kaeloo.]]
** Another episode had them go to a universe where they study academic subjects all day instead of playing games and hanging out, the normally fun-loving, friendly, hyperactive Kaeloo is a SternTeacher, Stumpy, who is usually stupid, is smart, and Mr. Cat, one of the smartest in the cast, is a moron [[ExtremeOmnivore who eats books.]]
* [[DiscussedTrope Discussed]] and [[SubvertedTrope subverted]] in the ''WesternAnimation/{{Futurama}}'' episode "The Farnsworth Parabox" when the main cast meet the versions of themselves from an alternate universe, and the doubles pair off to keep an eye on each other since [[WrongGenreSavvy each side is convinced]] that the other represents the "evil" universe (according to Alternate Farnsworth, "when you create a parallel universe it's almost always populated by [[EvilTwin evil twins]].") In fact, personalitywise the alternate cast are indistinguishable from the cast as we know them, the key difference being a handful of relatively mundane changes in circumstance caused by [[HeadsOrTails coin flips having the opposite outcome]].
-->'''Alternate Bender:''' Oh, this is awful. [[TokenEvilTeammate Somewhere there's a more evil Bender than me]]. [[CardCarryingVillain I DO MY BEST, DAMMIT!]]
-->'''Alternate Farnsworth:''' Leela. The ''good'' Leela. I want you to snoop around the other universe and find out how evil they are. ''(handing Alternate Leela a ray gun)'' Here.
-->'''Leela:''' I tell you they're not evil! ...But don't be confused! They ''are'' jerks.
* An episode of ''WesternAnimation/PeterPanAndThePirates'' has Peter going into the CenterOfTheEarth were everything is inverted and they have all copies of themselves; the Lost Boys are slaves, Hook is a pharaoh-like figure assisted by Egyptian-looking versions of the Pirates, and so on.
* ''WesternAnimation/{{The Adventures of Rocky and Bullwinkle}}'', in the serial ''Amazamoose and Squirrel Wonder'' (2019), required Moose and Squirrel to venture into Opposite World, where Boris and Natasha were heroes fighting against the sinister schemes of Evil Rocky and Evil Bullwinkle.

* ''WesternAnimation/TheAdventuresOfJimmyNeutronBoyGenius'' had an episode where Jimmy's evil clone uses a modified duplication device to make an evil copy of the entire earth except for Jimmy so that he will have an entire world where everyone is as evil as he is. Jimmy has to travel to the evil earth and reverse the duplication process because the duplicator also has the side effect of causing the original to fade away.
* ''WesternAnimation/SupermanTheAnimatedSeries'' did this in "Brave New Metropolis"; Lois finds herself in a Metropolis ruled by Lex Luthor, with Superman as his superpowered enforcer, having gone KnightTemplar after [[spoiler:failing to save his dimension's Lois from a car bomb]].
* ''WesternAnimation/TheSmurfs2021'': In "The Pluffs", Brainy and Smurfblossom find themselves in a parallel universe where the Smurfs (or rather, the titular Pluffs) are [[AlwaysChaoticEvil gray, mean, and have nothing better to do than bully each other]] or kindly folk like Bigheart (Bigmouth), or the kindly wizard Caramel (Gargamel). Even the wildlife are reversed, as the butterflies bite people and [[JustTheIntroductionToTheOpposites vicious rabbits chase cats up trees.]]
* An episode of ''WesternAnimation/AtomicPuppet'' saw Joey and AP fight evil versions of themselves from one such universe. The mirror Atomic Puppet also switches roles, with Joey as the puppet and AP as the wielder. Later, they meet the mirror version of [[BigBadWannabe Mookie]], who is the greatest superhero in his world and has a mustache for some reason.
* An episode of ''WesternAnimation/TheSecretSaturdays'' has a magic mirror bring The Mondays, their [[EvilCounterpart evil counterparts]] from a MirrorUniverse, into their world. Each of them has their personalities reversed ''and'' some physical differences to tell them apart. In addition, they are supposed to be made of Anti-Matter, which causes reality to go crazy every time one of the characters approached his or her counterpart ([[ArtisticLicensePhysics Actually, if they were made of antimatter they would have exploded like nuclear bombs the moment they entered the positive universe]]... which is [[spoiler: exactly what happens when Argost tries to absorb both Zak Saturday and Zak Monday's powers in the series finale]]).
* The ''WesternAnimation/MiraculousLadybug'' special "Miraculous World: Paris - Tales of Shadybug and Claw Noir" centers around Ladybug and Cat Noir meeting a benign version of [[BigBad Hawk Moth/Monarch]] from a world where their counterparts are villanous enforcers of that world's resident Big Bad. Outside those three, the mirror universe aspects are downplayed; it's shown that the alternate versions of Alya, Nino, and (according to a throwaway line) Chloé are all on the same moral wavelengths as their main universe counterparts.
* ''WesternAnimation/AdventureTimeFionnaAndCake'': In "The Winter King", the gang ends up in an alternate universe where their version of the Ice King managed to overcome the Crown's curse and is a benevolent and beloved ruler. He is also frequently kidnapped by the psychotic Candy Queen, the evil version of Princess Bubblegum, who comes from a corrupt version of the Candy Kingdom. [[spoiler:However, this is {{subverted|Trope}} at the end of the episode, where it turns out that this universe was once very similar to the original Ooo, except the Winter King was a sociopath who figured out how to transfer the Crown's curse on to Bubblegum so he could enjoy the power and immortality without the insanity. Fionna accidentally saps the magic out of the crown, killing the Winter King and freeing Bubblegum.]]

** PlayedWith in that Mirror World Kirby [[spoiler:isn't evil, he just thinks that Kirby is ''his'' evil counterpart]]. However, [[AntiHero Meta Knight's]] Mirror World counterpart plays this trope perfectly straight, lacking Meta Knight's sense of honor. The BigBad of the game, [[spoiler:Dark Mind, aka, the Mirror World's equivalent to [[VideoGame/KirbysDreamland3 0]], is as cruel, if not, crueler than than their real counterpart.

** PlayedWith in that Mirror World Kirby [[spoiler:isn't evil, he just thinks that Kirby is ''his'' evil counterpart]]. However, [[AntiHero Meta Knight's]] Mirror World counterpart plays this trope perfectly straight, lacking Meta Knight's sense of honor.

* In the ''Series/BuffyTheVampireSlayer'' episode "[[Recap/BuffyTheVampireSlayerS3E9TheWish The Wish]]", Cordelia [[BeCarefulWhatYouWishFor gets her wish that Buffy never came to Sunnydale]], turning the town (and likely the world) into hell. Xander and Willow are vampires and rule the streets at night, Angel is regularly sexually tortured by Willow, Buffy eventually turns up bitchier than [[Franchise/{{Terminator}} Sarah Connor at her worst]] to stop a vampire plot to rule the world, only to die trying like most of the show's characters.

*** The animated ''WesternAnimation/JusticeLeague'' also had the Justice Lords universe - a variation on the regular DCAU in which the death of ComicBook/TheFlash resulted in the League/Lords becoming a totalitarian dictatorship. The arc began life as a movie about the Crime Syndicate but was retooled to a more iron-fisted Justice League. Without explicit ties to any past work, the original idea finally saw light years later as ''WesternAnimation/JusticeLeagueCrisisOnTwoEarths'', which applied the concept to a large amount of Justice League characters. In addition to the primary Crime Syndicate members, Mirror Universe versions of ComicBook/MartianManhunter, [[ComicBook/{{Hawkman Hawkgirl]], ComicBook/GreenArrow, [[ComicBook/{{Shazam}} the Marvel Family]], Justice League Detroit, ComicBook/{{The Outsiders|DCComics}} and others are also seen. A heroic version of ComicBook/TheJoker called the Jester shows up at the beginning, while the American president is [[ComicBook/{{Deathstroke}} Slade Wilson]].

* [[ComicBookTropes Comics]] do this all the time. Franchise/TheDCU has its "anti-matter" Earth, wherein Ultraman, Superwoman, Johnny Quick, Power Ring, and Owlman (the Crime Syndicate of Amerika) are the evil duplicates of ComicBook/{{Superman}}, ComicBook/WonderWoman, ComicBook/TheFlash, ComicBook/GreenLantern, and ComicBook/{{Batman}} (the ComicBook/JusticeLeagueOfAmerica), and ComicBook/LexLuthor was the only superhero left in the world. A later story introduced the Justice Underground, a team of heroes led by Comicbook/TheRiddler's counterpart, the Quizmaster, and based on the various evil groups faced by the Justice League (such as the LegionOfDoom, the Injustice Gang/League, and the Secret Society of Supervillains). Other members of the group included Sir Solomon Grundy (a dapper and intelligent [[Characters/GreenLantern1941 Solomon Grundy]]), General Grodd ([[Characters/TheFlashRoguesGallery Gorilla Grodd]]), Lady Sonar (Sonar), Q Ranger (Major Force) and a heroic version of Star Sapphire. Following Riddler's temporary HeelFaceTurn, Quizmaster had a temporary FaceHeelTurn in ''Comicbook/Trinity2008''.
** ''Comicbook/ForeverEvil2013'' and its lead-up introduced two new Crime Syndicate members: Atomica, an evil version of Comicbook/TheAtom, Grid, an evil version of Comicbook/{{Cyborg}} and Sea King, an evil version of Comicbook/{{Aquaman}}. Owlman was also assisted by the Outsider, an evil version of Batman's BattleButler Alfred.

** ''Comicbook/DCYearOfTheVillain'' introduces Sky Tyrant, Comicbook/{{Hawkman}}'s Earth-3 counterpart.

** Power Ring is an interesting example. Since Hal Jordan was Earth-1's only Green Lantern at the time, Power Ring was originally a Mirror Universe version of Hal. However, as time has gone on and [[LegacyCharacter multiple heroes have used the Green Lantern name]], the Syndicate's Power Ring has been altered a few times to resemble later Green Lanterns like Kyle Rayner and John Stewart. During the "Syndicate Rules" storyline, Power Ring was even given an in-universe RaceLift changing him from a blonde white man to a bald African-American man to reflect John replacing Kyle as the Justice League's primary Green Lantern, with the new look explained as a CosmicRetcon caused by the destruction and rebirth of the Antimatter Universe during ''Comicbook/JLAAvengers''. Then, following Hal Jordan's resurrection during ''Comicbook/GreenLanternRebirth'', Power Ring changed ''back'' into a Hal analogue, with Ultraman even remarking on the sudden change.
** ''ComicBook/YoungJustice2019'' Issue #8 introduces the team's [[MirrorUniverse Earth-3]] counterparts: Amaxon Thunder for Comicbook/WonderGirl, Luthor-El for Comicbook/{{Superboy}}, Speed Zone for Impulse, Hack for Teen Lantern, Hex for Jinny Hex and Drake for Tim Drake. We never meet Comicbook/{{Amethyst|Princess Of Gemworld}}'s counterpart as she apparently overslept and missed the fight.
** The 2021 ''Comicbook/{{Crime Syndicate|2021}}'' mini-series introduces a new take on the team that explores Earth-3 in greater detail. The core group once again includes Ultraman, Superwoman, Emerald Knight (the [[AdaptationNameChange renamed]] Power Ring, who is now a John Stewart analogue once again), Johnny Quick, and Atomica, while Earth-3's Comicbook/{{Vixen}} and Red Star counterparts appear for the first time.
*** The animated ''WesternAnimation/JusticeLeague'' also had the Justice Lords universe - a variation on the regular DCAU in which the death of ComicBook/TheFlash resulted in the League/Lords becoming a totalitarian dictatorship. The arc began life as a movie about the Crime Syndicate but was retooled to a more iron-fisted Justice League. Without explicit ties to any past work, the original idea finally saw light years later as ''WesternAnimation/JusticeLeagueCrisisOnTwoEarths'', which applied the concept to a large amount of Justice League characters. In addition to the primary Crime Syndicate members, Mirror Universe versions of Comicbook/MartianManhunter, Hawkgirl, Comicbook/GreenArrow, [[Comicbook/{{Shazam}} the Marvel Family]], Justice League Detroit, Comicbook/TheOutsiders and others are also seen. A heroic version of Comicbook/TheJoker called the Jester shows up at the beginning, while the American president is [[Comicbook/{{Deathstroke}} Slade Wilson]].
** The idea is also used with the Injustice Syndicate in ''WesternAnimation/BatmanTheBraveAndTheBold''. In addition to Owlman, the group includes Scarlet Scarab (Comicbook/BlueBeetle, specifically the Jaime Reyes version), Barracuda (Aquaman), Blaze (Fire), Blue Bowman (Green Arrow), Dyna-Mite (the Atom, specifically the Ryan Choi version), Rubber Man (Comicbook/PlasticMan) and Silver Cyclone (Comicbook/RedTornado). Their enemies are the Justice Underground, whose ranks include the Red Hood (the Joker), Yellow Lantern (Sinestro), General Grodd ([[Characters/TheFlashRoguesGallery Gorilla Grodd]]), and unnamed heroic versions of C and D-list villains like Clock King, Kite-Man and Gentleman Ghost.

* ''Comicbook/{{Exiles}}'', of the Franchise/MarvelUniverse, had an issue where ComicBook/{{Galactus}} restored worlds instead of eating them, and the Silver Surfer was a power-hungry despot who had destroyed his own homeworld. The first issue of ''Exiles'' was in a universe where Magneto was the benevolent teacher who wanted mutants and humans to live in harmony, and Professor X believed there could only be peace when humanity was eradicated.

** ''ComicBook/TheThanosImperative'' features the Cancerverse, a universe where [[TheProblemWithFightingDeath Death has been wiped out]] by four powerful demons called the Many-Angled Ones, including Comicbook/DoctorStrange villain Shuma-Gorath (like the other three, a unique multiversal entity -- it has no [[EvilTwin good twin]] anywhere in the multiverse). Life has become pollution and is spiraling out of control, and every living thing in the universe is BrainwashedAndCrazy and are fanatically devoted to worshipping the evil entities, though non-living beings like the Vision (a robot) are immune and still heroic. Thus, in this universe hero teams like ComicBook/TheAvengers are the servants of evil gods, though presumably so is every living villain as well.
* ''Comicbook/SonicTheHedgehogArchieComics'': It has a Mirror Universe, called variously "The Reverse Universe", "Anti-Mobius", and "Moebius". In it Dr. Robotnik/Kintobor is a KindlyVet, while the Freedom Fighters fight against freedom, having overthrown the previous monarch. The Anti-Freedom Fighters (name later changed to the Suppression Squad) all dress in black leather, and acted like a bunch of juvenile delinquents until Anti-Sonic became "Scourge" and conquered Moebius.

* Similarly, in ''ComicBook/JLAAvengers'', the League, seeing the many imperfections of the Franchise/MarvelUniverse, conclude that it's the Evil Universe. Comicbook/TheAvengers, seeing statues and museums to the heroes everywhere in the Franchise/DCUniverse, conclude the exact same thing (they think the DC heroes have set themselves as gods).
* In the ''Comicbook/XMen'' [[AlternateUniverse alternate earth]] where Charles is Juggernaut, he ruled Earth as a dictator showing just how evil he would've been if not for his bullying big brother taking the Gem for himself. Several other "Evil Professor X" universes appear in ''Comicbook/{{Exiles}}'', sometimes with him balanced by a heroic Magneto.

* Comicbook/TheVision has Anti-Vision, his [[EvilTwin crooked doppelgänger]] from a parallel universe.

* Parodied in ''Series/{{Community}}''. When the tossing of a die to choose who picks up some pizza creates [[ForWantOfANail seven alternate universes]], one horrible one is created where [[spoiler: Pierce dies, Jeff loses an arm, Shirley becomes an alcoholic, Annie suffers a mental breakdown, Troy's larynx is destroyed, and Britta dyes a blue streak in her hair]]. GenreSavvy Abed deduces that they're in the "evil" universe, makes them all [[Franchise/StarTrek fake beards]], and makes it their job to break into the true universe and wreak havoc.

** There's also [[spoiler:Lemon Browning, who is the AlternateUniverse version of heroine Excellen Browning. The split came in a [[ForWantOfANail shuttle crash]]; the original Excellen survived without a scratch, while the other died and was [[ReplacementGoldfish rebuilt by her parents]] into a cyborg.]]

* In ''Webcomic/{{Homestuck}}'', [[ForWantOfANail Beforus serves as one for Alternia]]. At first it appears that the Beforus trolls are the GoodCounterpart to the trolls we know and love, but we soon see that they're easily capable of doing terrible things. The only difference is that they do it with an IDidWhatIHadToDo mentality as opposed to ForTheEvulz.

* ''Series/DarkMatter2015'': An alternate universe is introduced in the second season episode "Stuff to Steal, People to Kill". It's not a straight example of a Mirror Universe because not everyone's moralities are reversed, but the moralities of the ''Raza'' crew (our protagonists) are. In the primary universe, they were mindwiped at the beginning of the series and became subject to AmnesiacsAreInnocent, and in the alternate universe this never happened, so they are still a bunch of mass-murdering [[PsychoForHire Psychos for Hire]]. The AU crew join forces with Ferrous Corp and Emperor Ishida as a BigBadEnsemble in Season 3. The ChronicBackstabbingDisorder that crewmembers Two and Three encounter while ImpersonatingTheEvilTwin on the alternate ''Raza'' is an intentional ShoutOut to the attempted coup Kirk, [=McCoy=] and Uhura face in the ''Star Trek'' Mirror Universe. In keeping with the ''Trek'' Mirror universe episodes, the alternate ''Raza'' is also more dimly lit.

* ''Series/TheTwilightZone1959'': In "[[Recap/TheTwilightZoneS1E21MirrorImage Mirror Image]]", Millicent Barnes speculates that the appearance of her {{Doppelganger}} at the bus terminal is due to the normal universe converging with an alternate universe and that her doppelgänger must eliminate her in order to remain in the normal universe. Paul Grinstead later learns that she is right.

* The ''WesternAnimation/MiraculousLadybug'' special "Miraculous World: Paris - Tales of Shadybug and Claw Noir" centers around Ladybug and Cat Noir going to a mirror universe where their counterparts are the villains and [[BigBad Hawk Moth's]] counterpart is a hero. Outside of them, however, the mirror universe aspects are downplayed; it's shown that the alternate versions of Alya, Nino, and (according to a throwaway line) Chloé are all on the same moral wavelengths as their main universe counterparts.

* The movie ''Anime/NarutoTheMovieRoadToNinja'' from ''[[Franchise/{{Naruto}} Naruto Shippuden]]'' seems based on this concept. But is it actually a incomplete version of Infinite Tskuyomi that Tobi created, a Genjutsu world influenced by the minds of whoever got they are transported to it with most characters exhibit the reverse of their normal personalities. Ex. Ino becomes a prude, Shino hates bugs, etc. When Naruto and Sakura end up in the Genjutsu World, it acts on their fantasies by creating a reality where Sakura's parents sacrificed themselves for Konoha instead of Naruto's and the Akatsuki are heroes.

* The movie ''Anime/NarutoTheMovieRoadToNinja'' from ''[[Franchise/{{Naruto}} Naruto Shippuden]]'' is based on this concept. Naruto and Sakura are transported to a parallel world where Sakura's parents sacrificed themselves for Konoha instead of Naruto's and most characters exhibit the reverse of their normal personalities. Ex. Ino becomes a prude, Shino hates bugs, etc.

* In ''Anime/YuGiOhArcV'', Yuya, the protagonist, has two.
** Yuri is literally Yuya's counterpart from a different dimension, who is Yuya's [[ObviouslyEvil opposite]] [[TheDreaded in]] [[PsychoForHire every]] [[ForTheEvulz way]]. His ace, Starve Venom Fusion Dragon is also presented as a malevolent and evil counterpart to Yuya's Odd-Eyes Pendulum Dragon. He even sports a counterpart to Yuya's [[ForHappiness Smile World]] card: [[KickTheDog Ridicule World]], which prevents the opponent from attacking, all while creating sinister shadows that laugh and mock them.

** And then there's the Alternate Universe SG-1 that tries to steal the Daedalus in "[[Recap/StargateSG1S9E13RippleEffect Ripple Effect]]". Subverted slightly by Col. Mitchell, who points out to the alternate Mitchell that "You don't have a [[BeardOfEvil goatee]], so you aren't from the [[MirrorUniverse evil twin universe]]".

* [[DiscussedTrope Discussed]] and [[SubvertedTrope subverted]] in the ''WesternAnimation/{{Futurama}}'' episode "The Farnsworth Parabox" when the main cast meet the versions of themselves from an alternate universe, and the doubles pair off to keep an eye on each other since [[WrongGenreSavvy each side is convinced]] that the other represents the "evil" universe (according to Alternate Farnsworth, "when you create a parallel universe it's almost always populated by [[EvilTwin evil twins]].") In fact, personalitywise the alternate cast are indistinguishable from the cast as we know them, the key difference being a handful of relatively mundane changes in circumstance caused by [[HeadsOrTails coin flips having]] [[ForWantOfANail the opposite outcome]].