Pinhead

Pinheads are a type of creature appearing in Super Mario Galaxy 2. Their name comes from a word referring to a pin's flattened head. Each Pinhead appears as a bowling pin-shaped enemy with two beady eyes, a squiggly red mouth, and a yellow antenna. These creatures are very rare, appearing in only two galaxies: the Boulder Bowl Galaxy and Melty Monster Galaxy. Pinheads can be defeated only by Rock Mario, and when they see him turning into a rolling boulder, they tremble desperately. When hit, they release multiple Star Bits. However, if Mario or Luigi comes close to them, they squeal and hide underground until he moves away.