Blockin is an enemy that appears in Kirby & the Amazing Mirror and Kirby Squeak Squad. Blockins disguise themselves as Star Blocks. If Kirby tries to inhale him or attack him, Blockin will reveal himself, flashing at first much in the manner of Meta Knight's cape, and charge at Kirby. He will explode if Kirby avoids him. Blockin's name comes from the fact that he blocks Kirby's path, seeming to be an ordinary Star Block at first. They are often found in Moonlight Mansion and Carrot Castle.
When first encountering it, it is disguised as a Star Block, but when it reveals its true self, it looks like a yellow, floating block with an angry face.
The way to tell a Blockin apart from a Star Block is he's slightly more red.