Pixilart - UNDERPANTS SANS BATTLE by MrLFG

Just Some Sans Battle Faces I Made - Sans Face Pixel Art Maker - Free Transparent PNG Download - PNGkey

Editing sans (battle) - Free online pixel art drawing tool - Pixilart

Pixilart - Sans (Battle Sprite) by Nintendo-Fan

Pixilart - Sans deltarune battle by Understuff

Pixilart - Sans battle sprite *fixed* by MrLFG

Sans Battle Sprite Angles by Addicted2Electronics on DeviantArt

Ink Sans Battle Sprite by RamenNekoDA on DeviantArt

Sans Undertale (San tale), The Cool Kids Club Wiki

Pixilart - Underfell Sans (Battle) by AmazinG

Dusttale - Sans battle sprite (animated) by sotwound on DeviantArt