Arrow keys to move the soul. Blue - Gravity Red - No Gravity Z - Select X - Back Only fighting lets you win this one. Maybe if you like this, you won't have a bad time. This isn't 100% accurate to the real game, because I couldn't really do every single attack pattern and quote. He skips a lot of quotes, actually.
Thanks to SansleSkeleton for the original project Sans Boss fight Remake/Remix/Whatever.
