jfewihbfa so basically mettaton is actually a ghost (canon) and napstablook's cousin. he used to live on the snail farm with dummy and napstablook until he met alphys, who offered him a physical body. at a certain point in the game, if you call undyne and papyrus, undyne will talk about napstablook's neighbor/cousin but she can't remember his name. papyrus says he headcannons that the ghost's name is happstablook as a joke, but if you go into the sprite file of the pink house next to napstablook's, the file is called "hapstablook." thus, mettaton's real name is hapstablook, a ghost.

ejwijrowwjekhn oh, oki!