Board Thread:Questions and Answers/@comment-27530124-20160102194118/@comment-9663145-20160106001514

Well, What happens is after the true pacifist ending, It shows an extra creepy scene, As mentioned on this page.

The thing is...Even a true reset won't remove this scene, The only way to get rid of it is by modifying the games files to where you delete the game data from there, Although I would reccommand you watch a video guide before attempting to modify files, Here's one: https://www.youtube.com/watch?v=m1UQBgzeWE0