Board Thread:General Discussion/@comment-27894627-20160511021754/@comment-27701762-20160906025714

Saturn eat pie wrote: Mabian wrote: Mettaton, as in the robot, is referred to consistently as "he" by various characters.

Mettaton is actually a robot body inhabited by a ghost, whose name is not stated by the game. This ghost is Napstablook's cousin, and their house is located right next to Napstablook's house. A lot of people have concluded that Mettaton is a girl, or that the ghost was female prior to inhabiting Mettaton, because everything in that house is pink. The name and gender of this ghost is not stated, so it is theoretically possible that the ghost was female until they became Mettaton. Mettaton's goast is called hapstablook confirmed by calling undyne and papyrus in his house. No, that isn't "confirmed." Undyne specifically says she cannot remember the ghost's name, to which Papyrus responds "Happstablook, the Happy Ghost." Undyne then says "Okay, that's DEFINITELY wrong." Papyrus then says "It's not wrong. It's just my headcanon."