Ring Beamer

Ring Beamers, also known as Pulse Beams, are spiked yellow mechanical objects that appear in Super Mario Galaxy and Super Mario Galaxy 2. When Mario or Luigi approaches, they attack by emitting a circular shockwave that damages him if he touches it.

Ring Beamers are circular and yellow, and their heads are covered in spikes.

Super Mario Galaxy
Ring Beamers first appear in Super Mario Galaxy, featuring in the Toy Time Galaxy and the Dreadnought Galaxy. They are stationary objects that fire lasers in a circular shockwave formation, which will damage Mario or Luigi if he makes contact with them. They cannot be destroyed or stunned by any means.

Super Mario Galaxy 2
Ring Beamers reappear in Super Mario Galaxy 2, behaving identically to their first appearance, appearing in the Shiverburn Galaxy and the Grandmaster Galaxy. Unlike their debut appearance, this incarnation of them can be stopped by the Co-Star Luma, but not destroyed.