There was a pokemon cartridge that kept making people dissapear. It was like pokemon red and blue but it was purple, Gengar was on the back. When you play the game there is a black screen and then you see Prof. Oak all bloody, then suddenly you are in Lavender town with no pokemon or items, all the NPCs are gengars!! You walk around as the Lavender Town music gets louder and louder, images of gengar filling your head, until you feel weird, soon you are the gengars all along!!