Talk:W. D. Gaster/@comment-27004151-20151204204959/@comment-26123021-20151205063145

asked some dataminers, apparently the main things linking the mysteryman sprite and room are its position in the code (it's close to things such as the room_gaster, the followers, and the redacted rooms) and the sound effect made when he dissapears is the same as the one gaster follower who dissapears, and they are the only npcs to do so.