* Trey and Troy, the "bad" Dimensional Guardians from the web fiction serial ''DimensionHeroes'' often pick fights with the protagonists.
* In the ''GlobalGuardiansPBEMUniverse'', The ambitious and brutal Blackstar was thrown out of the Guardsmen, the intergalactic superhuman police force, and is now the sworn enemy of the heroic Guardsman, defender of Earth.
** The Tyrants are a "mirror universe" version of the Global Guardians.
* Website/ThatGuyWithTheGlasses has multiple, mostly due to a lack of actors. A list: [[PawDugan Dark Paw]], [[WebVideo/TheSpoonyExperiment Black Lantern Spoony One Prime]], WebVideo/AskThatGuyWithTheGlasses, [[{{Phelous}} Phelous D1, Suolehp]], [[WebVideo/AtopTheFourthWall Mechakara]], and [[IronLiz Judas Liz]].
* Among LOLCats, Basement Cat to Ceiling Cat.
** [[SdrawkcabName Tacgnol]] to Longcat.
* A lot of villains and heroes in Shadowhunter Peril serve as counterparts to each other.
** [[ActionGirl Vero]][[TheChick nica]] and [[DarkActionGirl Tay]][[DarkChick lor]].
** Gwydion and [[BigBad Valentine]].
** [[PhysicalGod Oblivion]] and [[AscendedDemon Umb]][[TheMessiah ra][[EvilTwin both dress in black, have blond hair and red eyes.]] There is only one factor that distinguishes the two of them: [[TheMessiah Umbra can love everyone unconditionally]], and [[EvilCannotComprehendGood Oblivion cannot love at all]].
* The Insanity Wolf meme to Courage Wolf.