TYPE: Ghost, Human.
TURF: Ghost Houses.
CLOSE RELATIVES: None.
SKILLS AND ATTACKS: Knocking Pool Balls into Luigi.
STRENGTHS: Great at oool, strong pull.
WEAKNESSES: His own balls, Poltergust 3000.
Slim was one of the world's greatest pool players. He tends to play by himself, even though he sometimes plays with others. One day he hit the balls so hard that one rebounded off the wall and hit him in the head, killing him.
Slim began playing pool with the ghosts in the Billiards Room in Boo's Mansion. When he hits the balls, they fly all around the room. When Luigi was searching for Mario, he encountered Slim and managed to use the balls to his advantage by sucking them to his vacuum and firing them at Slim. He defeated Slim and was awarded with the famous pool player's treasure.