Sentry Beam

Laser Robots are metal, robotic enemies that first appear in Super Mario Galaxy. They fight Mario by firing a laser beam at him and cannot be defeated. However, if Mario jumps on their head or shoots star bits at them, they cannot shoot their laser beam for a short amount of time. They first appear in the Battlerock Galaxy again in Bowser Jr.'s Airship Armada and then later appear in the Toy Time Galaxy.