Gameboy'd sans

Left - OG Gameboy

Middle - Gameboy pocket

Right - Gameboy colour + older models

epic

idk what i made but i think its pretty cute

Frisk

Outerswap Frisk and Chara

he secretly thinks it's cute

Error snes

Suggested by @Kukimonfohda717

Pepsi Sans

(the other sans' are clones he makes with Pepsi Magic which he gets from drinking Pepsi)

Undertale, but nothing's wrong.

Underkirb