Underpants Sans Battle Sprites by TheIronScyther on DeviantArt

Sans And Papyrus by pacherry-iko on DeviantArt

UnderTale Sans {battle sprite.} by HelloMaksRealAccount on DeviantArt

UnderPants (Disbelief) Backbone Papyrus by PootStablook on DeviantArt

Sans Battle Sprite Sheet by AManFromOuterSpace on DeviantArt

Sans Battle Sprite Redesign by TheIronScyther on DeviantArt, sans pixel art battle

Sans Battle Sprite Redesign by TheIronScyther on DeviantArt, sans pixel art battle

sans full battle sprite by swapfellNEOpapyrus on DeviantArt

Underpants Sans Battle Sprites by TheIronScyther on DeviantArt

Papyrus sprite colored by alecoronel9 on DeviantArt