Mandibug

Mandibugs are beetle-like enemies found solely in Super Mario Galaxy and its sequel, Super Mario Galaxy 2. They infested the Honeyhive Galaxy and are led by Bugaboom. They are apparently unfriendly neighbors of the Bees, and they take over the Bees' tower in the mission "Trouble on the Tower". Here, a big and little one appear on top of each other when Mario rides the windmill to the top. They are defeated by Mario, and they give up a Star. One can be defeated by executing a Ground Pound on its back. Along with the Honeyhive Galaxy, Mandibugs appear in a handful of other locations, including the Honeyclimb Galaxy and on Airships. They attack Mario by chasing him and harm the plumber with their mandibles. Mandibugs later appear in Super Mario Galaxy 2, where they appear in the Puzzle Plank Galaxy. Another pair of big and little Mandibugs, one on top of the other (from the first game), appear during the mission "The Puzzling Picture Block", as two bosses in one. Once again, Mario defeats them and gains their Star. Their leader, Bugaboom, makes a re-appearance in the Puzzle Plank Galaxy's hidden Star.

Trivia

 * The name "Mandibug" is a wordplay on the words "mandible" and "bug."
 * Mandibugs may be based off of the real world insects known as stag beetles.