Some wears on his clothes or something.

Insanity!Sans.

Undertale: Expelled Penalty. (Seri!Underfell.)

Scaredy Human and The Paper Flower. (Pedals.)

noelle joined

Flower!FellFell (Canon.)

Wheel of Misfortune

Underfell. (Brothers.)

I'm not gonna talk about these lol

Black

Horrortale. (Brothers.)