From the Super Mario Wiki, the Mario encyclopedia
The Noisemaker is an item in Pipe Down!. It is one of two items, alongside the Balloon, that Mario and Luigi can obtain from the Toad servants at Princess Peach's ninety-ninth birthday party. They can lose it if they accidentally open Princess Peach's bowling ball collection, causing the bowling balls to fall on top of them. It can be given as a present to a Clawgrip that is acting as a "Toll Crab" in a tunnel. Mario hesitantly gives it to the Clawgrip, who then lets them pass.