Does the Papyrus date count? I don't think the Papyrus date counts.

SOOOoooo, my answer is Undyne the Undying!

OK, I get that Sans' fight is genuinely crazy cool, but bros. Undyne literally got split in half, then reformed from literal dust in order to defeat you, and then she has so much determination, she FREAKIN MELTS. Plus she gets and epic theme song.

But the animations and comics for the Sans battle are pretty much the most impressive things I've seen for Undertale.    .u.

https://youtu.be/15ulE_ZgYRA

alright bai