Go on a Ghost Hunt

Go on a Ghost Hunt is the first mission of Big Boo's Haunt in Super Mario 64 and Super Mario 64 DS. Its objective is to eliminate all the Boos on the first floor of the haunted house.

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In order to collect this mission's Power Star, the player has to eliminate the five Boos on the first floor followed by the Big Boo that appears after the other Boos are eliminated. These are the locations of the five Boos: Once the five Boos are eliminated, the Big Boo will appear in the lobby. The Big Boo acts like the other Boos, but it takes three hits to defeat it. Once the Big Boo is defeated, the Power Star will appear on the second floor and a staircase will rise, allowing the player to collect it.
 * Two are found either at the back entrance room or in the second door to the left. The player can either use the nearby Vanish Cap or Luigi's Power Flower ability in the room to enter through the portrait or wait for the Boos to approach the player.
 * One is found in the left room in the back.
 * One is found in the right room in the back.
 * One is found either in the door across the falling bridge or in the door to the right in the lobby.

During this mission only, whenever the player character eliminates a Boo, it delivers the message "Ghosts...don't...DIE! Heh, heh, heh! Can you get out of here...alive?" After the last Boo is eliminated, it sends a different message: "Boooooo-m! Here comes the master of mischief, the tower of terror, the Big Boo! Ka ha ha ha..." (In the DS version, it says "titan of terror" and "Ha ha ha ha...")