Talk:Mettaton/@comment-172.4.167.122-20151108051401/@comment-24385214-20151109035742

Well, given that Mettaton was basically the underworld's #1 TV/movie/etc. star from before the start of the game, I dunno if he'd have a reason to hang out in the ruins inhabiting a dummy. I'm pretty sure that Napstablook just lays around in their normal ghost form, but there's not really anything saying for sure that they weren't in the first dummy so go nuts.

As for the pink house, it's very heavily implied that the previous inhabitant was Mettaton given how the diaries inside talk about the owner's love of show business and Alphys helping them out. There's also how Mettaton stands right next to it in the Pacifist Ending's epilogue.

As for the Mad Dummy...the most I know is that it hangs out right on a mat outside Undyne's house after you battle it as an actual training dummy. Apparently being a training dummy's a living.