Possessor Ghosts are the main boss ghosts of Luigi's Mansion: Dark Moon. As the name implies, each Possessor Ghost possesses a different body and must be forced out before being sucked up by Luigi. Each Possessor is defined by the number of horns on its head, each one having a horn for their turn being battled (i.e. the Grouchy Possessor has one horn for being the first boss.).