History Main / DemographicDissonantCrossover

** ''VideoGame/SuperSmashBrosBrawl'' would be the start of non-Nintendo {{guest fighter}}s joining the roster, with the very first one announced being Solid Snake from the ''VideoGame/MetalGear'', an '''''M'''''-rated series notorious for its realistic depictions of the horrors of war and violence, sex, profanity, tobacco usage, and political conspiracy storylines. Snake's ''Brawl'' arsenal is conspicuously limited to mines, grenades and similar [[StuffBlowingUp explosive]] weapons rather than anything that shoots bullets, and while he ordinarily smokes like a chimney, NoSmoking is in full effect here.

* The adorable ''Anime/RascalTheRaccoon'' has had not one, but ''two'' crossover campaigns with the gritty and violent ''Anime/AttackOnTitan''.

** ''VideoGame/LikeADragonInfiniteWealth'' has Gachapin and Mukku, two characters from the preschool show'' Hirake! Ponkikki'' appear as guest characters.

* ''WesternAnimation/TheLEGOBatmanMovie'' (which is aimed towards families) contains references to all different ''Franchise/{{Batman}}'' media, where it's all implied to happen in the same universe, from the DarkerAndEdgier [[Film/TheDarkKnightTrilogy Dark Knight Trilogy]] and Franchise/DCExtendedUniverse to the campy [[Series/Batman1966 Adam West TV series]]. But where the film plays this the most straight is when [[spoiler:the prisoners from the Phantom Zone]] are revealed to be famous antagonists from many well-known works of fiction. Most of the works represented are at least appropriate for children, such as ''The Wizard of Oz'', ''King Kong'', and ''Harry Potter''. One notable exception, however, is the presence of Agent Smith and his clones from the R-rated ''The Matrix'' movies, as well as the shark from "Jaws", though he is used as the punchline for a joke.

* ''WesternAnimation/TheLEGOBatmanMovie'' (which is aimed towards families) contains references to all different ''Franchise/{{Batman}}'' media, where it's all implied to happen in the same universe, from the DarkerAndEdgier [[Film/TheDarkKnightTrilogy Dark Knight Trilogy]] and Franchise/DCExtendedUniverse to the campy [[Series/Batman1966 Adam West TV series]]. But where the film plays this the most straight is when [[spoiler:the prisoners from the Phantom Zone]] are revealed to be famous antagonists from many well-known works of fiction. Most of the works represented are at least appropriate for children, such as ''The Wizard of Oz'', ''King Kong'', and ''Harry Potter''. One notable exception, however, is the presence of Agent Smith from the R-rated ''The Matrix'' movies.