Unlike other Clefts, they are bald and Mario can jump on them. They are immune to fire but can be flipped with a POW Block. They are found in Schwonk Fortress. A POW Block can kill them with one hit.
Another sub-species of this enemy is the Hyper Bald Cleft. It is stronger, but is otherwise the same as the Bald Cleft.
In Super Paper Mario, they hide from the player by disguising themselves as rocks, during which time they are invincible, and only reveal themselves when Mario, Peach, Bowser, or Luigi get near them. The easiest way to kill them is to use Boomer.