Board Thread:Wiki Discussion/@comment-44163593-20191017231226/@comment-36320723-20200220114822

Disbelief Ending:

You all know Disbelief Papyrus right? This ending would make him canon.

A couple posts ago, someone suggested a custom ending after 100 genocide runs. Well, to quote Flowey, "Thats a wonderful idea!"

So, you do 23 Genocide Route runthroughs and on the 24th (OST 24 is Bonetrousle), the disbelief ending occurs. Sans, because he can remember crap after resets, decides to save you from Papyrus so he wont have to see him die again, and you fight Sans again (full power, at level 8 ish) and you kill him. Then the whole disbelief thing plays out, and then it becomes a normal genocide ending after Papyrus