Sans looks silly in goaminate.
Sans got Frisk rekt!
How about some milk RongRong?
It's okay but the fight scene was pretty lazy, just the same thing looped over and over again, and not very interesting either. The way you drew sans' head was kinda weird so you probably need to work on the anatomy of your characters. However, the fight scene had some pretty great 'smears' to make the movement look more fast and blurry and the camera movement and shaky movement on impacts made the animation much more chaotic (in a good way). I also liked the way you changed the background colour (lighting) to change mood but it just seemed lazy at the start where the bg colour was completely white. Overall animation quality was okay, but could have had more inbetweens and smoother motions (but that might just be me being fussy).
Good work and good luck in the future!
9/11 would die again :D
Sans face tough xD
Rule #1 of fighting Frisk: DO NOT CLOSE YOUR EYES