Rock'n is a bipedal Badnik that camoflages itself as on of the many sandblocks littered around the Sandopolis Zone in Sonic & Knuckles. If the player attempts to jump on one, it will get up and start walking around. It can only be destroyed if the player spin-dashes at its lower body. Rock'n cannot directly harm the player, but it can push the player back by walking into them.