Boo Ball

Boo Balls are items in Luigi's Mansion. While exploring the mansion, Luigi may follow the Boo Radar's signal to a Boo, only to find one of these decoys instead. Boo Balls are white spheres with the face of a Boo printed on each. They cannot harm Luigi, and he can suck them up onto the nozzle of his Poltergust 3000 and blow them out, destroying them.

A Boo Ball returns in Luigi's Mansion 3, appearing in the Sandy Grand Hall in the Tomb Suites on the tenth floor. Unlike in Luigi's Mansion, the Boo Ball cannot be destroyed by sucking it in and then blowing it out. Instead, the player has to fire it at the top of the pyramid in order to destroy it. When the Boo Ball is destroyed, it releases three gold bats and the player earns an achievement called "Found and popped the beach ball in Tomb Suites."