Big Boo's Haunt

Big Boo's Haunt is the fifth course in Super Mario 64 and Super Mario 64 DS, and is located in the Castle Courtyard. To gain access to the level, the player must defeat the larger one of the Boos there, then walk up to the small object that appears. The course features a large building and grounds, with three floors, an accessible balcony that leads to the roof, and a basement. The boss, who is fought a number of times, is Big Boo.