* In ''Fanfic/TheLionKingAdventures'', the King of Dreams is this to Simba. He looks like an older version of him, using his dreams in order to psychologically torture him into turning evil.
* In [[http://alaxr274.deviantart.com/gallery/37280372 Hottie 3: The Best Fan Fic in the World]], Judas Blythe, who is from an AlternateUniverse, is the evil counterpart of Blythe Baxter from ''WesternAnimation/LittlestPetShop2012''.
* ''Fanfic/CalvinAndHobbesTheSeries'':
** Dr. Brainstorm and Calvin are both inventors, though while the former is a StupidEvil BunglingInventor CardCarryingVillain, the latter's inventions actually ''work'' most of the time.
** Likewise, Jack and the MTM are both [[DeadpanSnarker snarky]] [[DoAnythingRobot Do-Anything Robots]], though the latter is more faithful than the former.
** Brainstorm and Jack ''themselves'' have evil counterparts in the form of Thunderstorm and Shadow, who are one of the series' most competent villains.
* ''FanFic/DungeonKeeperAmi'' has Mercury and Mukrezar - both are physically weak, but possess devastating magical skill, both conquered the Avatar islands, both are resourceful and cunning and use that to win rather than brute strength.
* ''FanFic/FalloutEquestria'' has Lilpip and Red Eye. Both are Stable Dwellers that wish to make Equestria like, or better than what it was before the Great War. They also both represent one of the Elements of Harmony when corrupted.
** Red Eye, who gave up every comfort he had to bring some sense of order to the Wasteland, represents corrupted generosity.
** Lilpip, who's overwhelming concern for others often leads to self-destructive and irresponsible decisions, represents corrupted kindness.
** Lilpip herself lampshades this as she realizes that, though she despises Red Eye's system being built on slavery, it's the first real working infrastructure Equestria has had in hundreds of years. Red Eye, for his part, feels enough mutuality with Lilpip that he offers to abdicate his position to her. It doesn't help that Lilpip is your typical ''Fallout'' protagonist (albeit one with exceptionally good karma) and Red Eye is very much an anti-villain compared to other antagonists in the story.
* ''FanFic/ToKillAThief'' has [[Manga/DeathNote Light Yagami]] to [[KamikazeKaitouJeanne Miyako Toudaiji]].
* The ''Comicbook/XMen'' fic ''[[http://www.fanfiction.net/s/7730502/3/The_Wraith_Saga The Wraith Saga]]'' gives us The Wraith, an EldritchAbomination that is essentially the Yang to the Phoenix Force's Yin, representing Death, darkness and oblivion. Subverted, in that [[LightIsNotGood the Phoenix can also be extremely destructive in its own way]], but it's made clear that the Wraith potentially poses a much graver threat if it gets out of control.
* ''FanFic/ClashOfTheElements'': In part 2's finale, Chaos Alex is this to Alex Whiter. Though this is actually {{Inverted|Trope}} from Chaos Alex's point of view, for he thinks the real Alex is the evil half. Also, the Sin Samurais to the Genesis Samurais.
* Eridan ends up becoming this to Nepeta in ''FanFic/HerdingCats''. Where Nepeta ships her fellow trolls in redrom, Eridan does so in [[SlapSlapKiss blackrom]].
* ''FanFic/RacerAndTheGeek'' does an interesting take on this trope. Service in the Royal Guard or the Equestrian Royal Army, is considered highly honorable by the populace. However, those who do similar work in a private outfit are considered the lowest of the low. Regardless of the actual character of those involved, their actions and motives will be interpreted very differently depending on if they are a trooper or a contractor.
* ''FanFic/ThanksKyubey'' had Juubey as Kyubey's evil counterpart, by having Kyubey have actual emotions and being more forthcoming with information about Puella Magi, and having Juubey act like...well, the [[Anime/PuellaMagiMadokaMagica canon Kyubey]]. [[spoiler: Juubey got better.]]
* ''WebAnimation/TurnaboutStorm'' has Sonata, an almost complete IdenticalStranger to [[VisualNovel/AceAttorney Mia Fey]] if it wasn't for the whole [[WesternAnimation/MyLittlePonyFriendshipIsMagic being-a-unicorn]] business. While Mia [[MentorOccupationalHazard was]] kind and motherly, Sonata is [[IceQueen cold]], ruthless, [[spoiler:and practices {{Blackmail}}, the very practice Mia fought against and lead to her death.]]
* ''WebAnimation/ZanyToTheMax''
** The Zarner siblings, Takko, Jakko, and Zot started out as evil counterparts of Yakko, Wakko, and Dot. They first appeared in a parody of ''WesternAnimation/ThePowerpuffGirls'', where they were created by WesternAnimation/PinkyAndTheBrain as part of a plot to TakeOverTheWorld. This was their only Season 1 appearance. Even though the Zarners started out this way, they've become less evil starting with their second appearance. They even made it into the theme song! (In Season 1, the 4th section started with "Meet [[AHeadAtEachEnd ZakKo]], [[BigEater Pakko]], [[AuthorAvatar Makko]], [[SuperSpeed Jot]], the [[ConjoinedTwins Yarners]], and [[InkSuitActor Coach Nurse]]." From Season 2 onward, it went "Meet the Warner cousins, Yarner Twins, the Zarners, and Coach Nurse.") By Season 3, the Zarners have become good friends of the Warners.
* {{Deconstructed}} in ''Fanfic/WhiteDevilOfTheMoon''. Luna sees Fate in her Barrier Jacket and automatically assumes that she's evil. Unfortunately, she finds out that DarkIsNotEvil, but she isn't going to take being attacked lying down.
* The ''LightNovel/ACertainMagicalIndex'' fic ''[[http://www.fanfiction.net/s/9539513/1/Twist-of-Fate Twist of Fate]]'' features a villain called Kurosawa, the Nightmare Witch, who has IKnowWhatYouFear powers and enjoys {{Mind Rap|e}}ing people until they die or go into comas. After Kurosawa is defeated, Misaki Shokuhou, a powerful telepath who could MindRape someone if she wanted to, points out that Kurosawa is basically a darker version of her.
* In ''FanFic/{{Horseshoes and Hand Grenades}}'', Gentaro and Ryusei obtain dark States changes. Gentaro obtains [[spoiler: Void States for the defunct Cosmic States]], and Ryusei now has the [[spoiler: Meteor Impact States]] for Meteor Storm.
* ''FanFic/ForHisOwnSake'' has Chisato and Kagura, who serve as EvilerThanThou counterparts to the {{Spoiled Brat}}s Naru and Mokoto:
** Like Naru, Chisato wants to get into TokyoUniversity. However, while Naru works hard to achieve her goals, Chisato is willing to do ''anything'', including lying, cheating and stealing. She also blames Keitaro for [[spoiler:how she got caught stealing from a teacher]], even though ''she'' ran into ''him'' and he naively let her go, unaware of what she was doing. In other words, just like Naru, it's [[NeverMyFault Never HER Fault]] that she does terrible things and she blames those hurt by her actions.
** Kagura, meanwhile, hates men just for being male and loves uses false accusations as 'justification' for [[UnprovokedPervertPayback viciously attacking them]]. In the past, this has led to her flat-out [[spoiler:'''murdering''']] at least one innocent victim. Not only does she show absolutely no remorse for this, she continues to insist she was the one in the right -- and her father's lawyers kept her from dealing with the consequences. In a dark mirror of how Naru and Mokoto get others to go along with their punishing Mokoto, Kagura has even remained friends with the victim's sister, convincing her that it was just a 'tragic accident'.
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