Bodymix up is an Undertale AU where one of Gaster's older experiments caused all the monsters of The Underground to have their parts mixed with each other such as Sans and Alphys or Papyrus and Undyne.

The original source can be found here: (

Tumblr inline o8ev5qKyBJ1tvoz67 540
Tumblr inline o8ev6kAODB1tvoz67 540
Tumblr inline o8ev5osCLL1tvoz67 540
Tumblr inline o8ev6mhmWR1tvoz67 540

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.