[Of course, the problem with not being able to see his brother is--well, just that. He has to rely on sound to make sure Papyrus hasn't been lured away by some other doppelganger or something. But if it's just a matter of talking, that's fine.] The entrance was down in the basement, I don't think the kids know about this place. [But if Papyrus is saying he didn't see anyone until the doppelgangers started showing up, then who is it who was doing the surgeries? Unless it was the doppelgangers... One of them did have Papyrus's face. But it could have just--have just taken it, later... Ugh.] There's some ghosts up there tryin' to make all of us real aware of it, though. Not ghosts like at home, think human movies.

[Spooky poltergeists that Sans, honestly, had only been marginally aware of outside of the message they were trying to deliver. He'd been--distracted, since Papyrus got kidnapped.]