• Alternate UniversesGo to Category:AUs
  • LocationsGo to Category:Locations
  • CharactersGo to Category:Characters
  • ItemsGo to Category:Items
  • MusicGo to Category:Music
  • StoriesGo to Category:Stories

Welcome to the Undertale AU Fanon Wiki

Hello and welcome to the Undertale AU Fanon. This is a place where you can post ideas for new AUs, characters, locations, enemies, and new plot ideas. Please read the wiki and roleplay rules before contributing.

Wiki Rules | Roleplay Rules


  • Some topics during the RPs may be offensive to some people, so please join at your own risk.
  • ANY RPs that are involved with this wiki may - and probably will - contain spoilers. If you care about your Undertale and their AU experience and don't want it spoiled in some way, continue with caution.

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