Pixilart - Undertale hard mode sans by useless-link

DustDust] - Divine Harderlovania [Hard Mode + Divine]

Pixilart - sans hard mode no sheet by Tinkydiopsy-2

Who do you think is stronger? : r/Undertale

Cross-Chara's Likes - Pixilart

What if Chara (Undertale genocide route) possessed Goku? - Quora

undertalehardmode - Pixilart

POV: You said that Undertale fan-made fights and games aren't even that hard/good : r/Undertale

Did you like Undertale or Deltarune better? - Quora

Pixilart - [HARD-MODE] sans by Anonymous

Undertale Hardmode Wonderful Idea Sans Phase 1.5 by Ninjamoves110 on DeviantArt

DTLG (hardmode) Sans - battle sprite (official) by sotwound on DeviantArt