You know how Napstablook has confidence issues? I think it is because the Mad Dummy mentions how the ghost inside the dummy you talk to only wanted a friendly conversation. The ghost, in this case, is Napstablook. As you probably know, Mettablook is napstablook's cousin. You know, mettaton. Mettaton recognizes you in Hotland because he has seen you before. As the Mad Dummy. The mad dummy was overprotective about Napstablook, his cousin. But being so long away with the body of his, he didn't know about the "acid rain" attack Napstablook had. That's why he went away, because he feared that it was YOUR attack. And he didn't want the show to end. That, is why, in the Genocide run, Alphys had enough time to develop Mettaton NEO.
