From the Super Mario Wiki
(Redirected from Boo Cemetary)
When players decide to stop here, they meet four Boos, who have just been robbed of their Golden Boo Statue. Their quest, True-Blue Boo, is somewhat of a mystery, for Shroomlock appears to help. The Boos state their problem, then notice that there are four Boos when there are supposed to be three. Shroomlock concludes that one of the Boos is the thief and asks players to find the phony. They will be able to tell which one is the false Boo by looking at how it dances with the others in a small game. If players guess correctly, the false Boo turns out to be Koopa Kid, who runs away, leaving the Golden Boo Statue behind. As Shroomlock leaves with the case closed, the three Boos reward the player with the Predictotron Gaddget.