>>57241297Missingno could just be failed experiments from Cinnabar Mansion haunting the nearby coastline. They may have also inherited Mew's Transform capability but couldnt control it so cant form a real shape. Plus their out of control inherited Psychic abilities distort and wreak havoc on anyone exposed to them causing phenomena like item duplication, messing up hall of fame/PC or even killing the player (game save is erased), etc.
