El Bailador

Some dance guy from Undertale Yellow who forces you to dance.
Lots of people died to him, but luckily, there is Auto Rhythm, which makes the fight a lot easier.

Jerry: Hey guys, after I used the bathroom, I started playing on my computer, and this darn guy named El Bailador keeps killing me!
Snowdrake: Jerry, that's what you get for being so annoying!
Jerry: Shut up, drake! He kept making me dance, and he had some kind of finale attack! I could barely dodge that!