• 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. Dont say mean things to people that rp.

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