HARD MODE SAAAANS : r/Undertale

Sans/In Battle, Undertale Wiki

Games like Undertale:HARD MODE Sans Fight(Difficulty:Hard)

Undertale Hard Mode Wonderful idea sans sprite by CoolDudepro on DeviantArt

Undertale Hard Mode Sans Fight (CU Take) by CU1121 - Game Jolt

Underfell : Hard Mode Fell Sans Fight by Buddy_69 - Game Jolt

Sans fight Hard mode Project by Comet Ladder

Undertale - Hardmode Sans( kinda spoilers?) by Deimion_J_ShadowWolf -- Fur Affinity [dot] net

Sans AU Group - Pixilart

Height of the monsters: Proof that Sans isn't short, and the monsters are freaking huge – evanthelynn

hard Mode sans (ask before using) : r/Undertale