A Mandibug is a species found in Super Mario Galaxy for the Wii. They're found on the Honeyhive Galaxy where they attempt to take over the bee's kingdom. Mario manages to thwart the antagonistic bug's plans be defeating their king in one of the game's levels.
The creatures are insects who scuttle around the stage until they spot an opponent, where they'll charge into them. Jumping on them won't kill them, though a ground pound will.
The following are the levels that the species can be found on: