Talk:Genocide Route/@comment-94.193.48.3-20151106150307

You don't actually have to kill all monsters before fighting Papyrus. I accidentally fought him once with one monster remaining (I thought the boss would count towards the kills) and then went back to kill the last remaining monster, and still could get the fight against Undyne the Undying.

Although I think Papyrus is the only one where you're actually capable of doing this.