Fawful used his headgear to suck up Princess Peach's voice. When Mario, Luigi and Bowser encountered Fawful, he used his headgear to injure Bowser, forcing the brothers to battle him. Fawful used his headgear to attack the brothers, which can be stomped. After he loses his headgear, he attempts ramming into the brothers. After battle, Fawful used the headgear to destroy the Koopa Cruiser.
Fawful used the headgear to sunction the Dark Star's power, transforming himself into Dark Fawful, which allowed him to fawfulize Princess Peach's castle. Fawful used his headgear during battle and the Vacuum Helmet is absent in the rest of the game.