Underswap Sans, ULCFan Wiki

Underswap is an AU where many of the characters' roles are swapped, as well as their personalities, though some quirks tend to stick in places, or are modified. Sans is the excitable, confident, extremely optimistic human hunter, while Papyrus is the laid back, protective bro following Chara

Underswap Sans (Canon), Wiki

Sans/Underswap, New Undertale Fanon AU Wiki

UnderSwap Sans•, Wiki

Team Switched Papyrus, ULCFan Wiki

Sans, Canon Underswap Wiki

Sans/Underswap, New Undertale Fanon AU Wiki

Underswap Papyrus, ULCFan Wiki

Canon Underswap Blog

Sans, Underswap Wiki