Sans and Gaster cause why not-

sands the skeleton - Big thanks for @Danhx for making the animation go and follow him.

Undertale and Underfell sans + OW sprites

[undertale] the undermen

Sudden Changes

When you have a lot of IQ

Undertale - sans animation

Remember son...

due to recent events 👻

InvertedShift

-Battle of the Fallen-