Sans and Gaster cause why not-

Undertale and Underfell sans + OW sprites

- Homicidal Lunacy -

woke up from a nap and immediately made this for no reason

Sudden Changes

[undertale] the undermen

Dusted Maddness

Undertale - sans | version 3

When you have a lot of IQ

InvertedShift

-Battle of the Fallen-