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, Undertale AU Characters Wiki

Canon!Underswap Sans Fight, UNDERTALE Fangame

Sans, TS!Underswap Wiki

Underswap Sans (Canon), Wiki

Underswap!Sans, XTale Wiki

ULC] M87 Sans Sneak Peek

UNDERSWAP - Sans by Bloody-Uragiri on DeviantArt

Underswap Sans, Wiki

Team Switched Underswap Sans by Flybydogey101 on DeviantArt

UnderSwap:Captain Sans by Mettalicc on DeviantArt

Sans, TS!Underswap Wiki

Sans/Underswap, New Undertale Fanon AU Wiki

Sans (Underverse), FC/OC VS Battles Wiki

Horror Sans, ULCFan Wiki

Sans, Canon Underswap Wiki