Mobile Sentry Beam

A Mobile Sentry Beam, also known as a Laser Pod , is an enemy that first appears in Super Mario Galaxy.

Super Mario Galaxy
They first appear in this game, where they first appear in Battlerock Galaxy. They chase Mario to shoot a laser at him. If Mario jumps on top of them, they will stop to shoot a laser until Mario gets off. They also appear in Bowser Jr.'s Airship Armada and Toy Time Galaxy.

Super Mario Galaxy 2
They reappear in this game, remaining unchanged from their first appearance. They appear in Mario Squared Galaxy and Grandmaster Galaxy.