Clamer is a Badnik usually found in the Carnival Night Zone. Looking heavily like a clam, the robot's only attack is to fire a spiked ball out of its mouth through a cannon. The Badnik's unique touch is that jumping on it causes the hero to spring off, giving Clamer a fantastic defense. However, it can still be destroyed by spinning into its unprotected front (or by being invincible).
Clamer's only appearance in Sonic the Comic is a cameo in which one was being melted down for failing Doctor Robotnik once too often. Since Clamer only appears in the second half of Sonic the Hedgehog 3, it did not feature in the Sonic's World feature of the first Sonic the Summer Special.