Talk:W. D. Gaster/@comment-27295233-20151216032928/@comment-27410437-20151216183421

It's a well known bug, apparently; there's one with Toriel on youtube if you search "toriel wrong number song". According to someone in the comments, it's got something to do with whom you had your last dialogue with. It's a super creepy bug because not only does it show a certain character's sprite, but it also has their voice.