Sans Battle Sprite (My style) by SirAnon325 on Newgrounds

Sans got a new special attack (its a shotgun) by InconspicuousToast on Newgrounds

SanswichNG

Sans Battle Sprite (My style) by SirAnon325 on Newgrounds

sanstrongstyles

Classic Sans In-Battle Sprite Coloured + BW (OLD) by SafetyBob9001 on DeviantArt

Sans But Girl [the sprite sheet] by steven123452 on DeviantArt

Sans Battle Sprite Head (mode changing)

Pixilart - Sans Sprite V3-4 by ScarredPixel123

Forbiddensouls sans sprite - updated/complete by Mrmitten on DeviantArt

Undertale sans battle sprite V6 by guardianofskeleto on DeviantArt