Grubba

He is a boss character who just so happens to be in possession of one of the Crystal Stars in the second Paper Mario game. He ran a wrestling pit called the Glitz Pit in a fancy town floating above the clouds called Glitzville that accommodated fighters from all over. The middle of the arena held one his most horrific secrets though. It was that Grubba was actually stealing the souls of his top fighters and making it look like they were running away. No one seemed to suspect him except for his assisstant Jolene, a younger sister Toad of one of the original champs named Prince Mush. When Mario found out about Grubba, Grubba brought out his soul-stealing machine which happened to have a Crystal Star for its fuel source. He revealed that the machine was being used to keep him looking young forever. Prince Mush had been one of his first victims it turned out. He then used the machine to become Macho Grubba, a powerful version of Grubba.