Talk:Undyne's House/@comment-27335304-20160310215302/@comment-28546429-20160726234552

(Since you ask and this can only be accessed by pacifist, this reply is centered around the pacifist forms)

Actually, Mettaton doesn't use his EX form until you battle him, as it was the only form he was vulnerable in. Besides, his body was under construction at the time (actually, it still was when you battle him), so it was probably Mettaton. It just makes it even funnier that a rectangular box tried to look seductive.