Board Thread:General Discussion/@comment-30388913-20170215175848/@comment-27345308-20170727220515

That's a very confusing question.
 * If you teleported to the Sans room without doing anything you wouldn't be fighting Sans at all since that would be a Neutral Route.
 * If you changed your save to meet Genocide Route requirements and then teleported to the Sans room, after you teleport back to the first room after killing Sans everything will be already cleared because I'm pretty sure Sans sets the "plot value" that determines what part of the game you came to.
 * If you teleported to the last room after cheating in Genocide Route requirements, killed Sans, reset your game and went to the Sans room again, he will appear. That doesn't make no sense though.