Welcome to the fan-made wiki that’s dedicated to documenting the non canonical offspring of Undertale AU characters! We currently have 232 pages, 6 active users, and 764 files on this Wiki!

Spin the "Sans AUs" wheel and dive into the multiverse of alternate universe versions of Sans from Undertale! With options ranging from Dream, Error, Horror, to Ink and beyond, each AU offers a unique twist on this beloved character.

Undertale AU Wiki Welcome to the biggest encyclopedia on Undertale and Deltarune AUs. There are currently 635 articles, 2,890 files, and 31 active users on the site! Just know that it is REQUIRED for you to read the Rules and Guidelines and the Policy of the Wiki BEFORE contributing to our Wiki.

Palette Roller is the non-canonical ship child or, an offspring of Drink - Ink!Sans x Dream!Sans, along with being created by Lasserbatsu (formerly known as Angexci) on Tumblr.

Stain bears a heavy resemblance to Nightmare and Vantablack (the fusion of Nightmare and Ink from the Admixverse au, previously called Accidentverse). Stain's two tentacles have the same galaxy design his long sleeves had.

Community content is available under CC-BY-SA unless otherwise noted.

Undertale Alternate Universe (AUs) are what-if changes to the universe of Undertale. AU categories are used to differentiate AUs and to avoid confusion between AUs (categories are not AUs themselves). An AU can fit under multiple categories.

"i'm sans. sans the skeleton." – Sans Characters who is a AU Variant (or have the appearance) of Sans the Skeleton.

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A women who loves children dies and is face to face with the decision to reincarnate as nightmare sans if she allows herself to be Karmas chosen child. 'Fgod error belon...