If any floating metal heart could pull a Gwen Stefani, Mettaton can. Sans can't quite see him, but he knows Mettaton thinks he's been talking shit.

"Nah. I just played sidekick," He said with a wink. "Detectives need an ear for their theories, y'know. And Gerson let me borrow an old trench coat and a hat so he could dress the part. You shoulda seen him, it was pretty cool."

There's some shuffling and sparking sounds coming out of Mettaton's body. That's normal.

"Anyway. He was already goin' the right direction on his own. I just gave him some vague ideas when he got stuck."