Pierobots are clown-like robots who stand on gears. They dance on the gears and they will fall. They wear pink.
When Mega Man encounters a Pierobot, Mega Man cannot destroy the gear; he must shoot the Pierobot and they can fall into gaps. When Mega Man sees a gear, a Pierobot will fall down on it.
Pierobots in Captain N only appeared in The Big Game. They have red noses, like circus clowns do. They ride on bikes, chasing Lana and Kevin during the beach scene. They are the only enemies that have lines. They are called "Gear Clowns".