Board Thread:General Discussion/@comment-30388913-20170215175848/@comment-31873867-20170430070648

Interesting idea... In fact, I think killing sans doesn't affect the pacifist route. There was once a bug in undertale that you could see the true pacifist route in LV 10... (The bug is fixed now) Here's the link. https://www.youtube.com/watch?v=MCAiWMISf40

Thus in my opinion, the game doesn't really notice that the player actually killed anything, soooo.... guess you could still see true pacifist after killing the best skele ever ;-;