Moon Cleft

Moon Clefts are a very powerful lunar species of Clefts. Aside from the increase of power, they look and act nearly identically to normal Clefts.

Paper Mario: The Thousand-Year Door
In Paper Mario: The Thousand-Year Door, Moon Clefts are found during the portion of Chapter 7 that takes place on the moon. These Clefts have high statistics but are easy to beat when an explosion, such as from Admiral Bobbery, flips them over, lowering their Defense down to 0. Like their relatives, they disguise themselves as rocks, but they reveal their true form when Mario comes close enough. Moon Clefts attack by charging at their opponents, and cannot be stomped because of their spikes. This enemy has colors similar to a normal Cleft from Paper Mario, whereas those are pale gray in Paper Mario: The Thousand-Year Door in fitting with the color scheme of Boggly Woods. Their tattle also states them to simply be a basic Cleft found on the moon. They have the highest defense power in the game, alongside Chain Chomps and Elite Wizzerds.

Super Paper Mario
Moon Clefts, sometimes simply called Clefts in passing such as by Flint Cragley, appear in Super Paper Mario in Chapter 5-1, near Downtown of Crag. Their attack pattern remains the same: they charge at Mario and his allies as soon as they get close enough. They still have the same weakness, as Boomer can flip them over. Moon Clefts will occasionally drop a Cake Mix when they are defeated. In the original Japanese script, these are considered normal Clefts, though the localization calls them Moon Clefts despite not being on the moon. A shadowy version, called Dark Cleft, appears in the Flopside Pit of 100 Trials.

Trivia

 * The respective internal file names for Moon Clefts and normal Clefts in Paper Mario: The Thousand-Year Door indicate that at some point in development, Moon Clefts were intended to be the "base" version of Cleft while the final game's normal Cleft was intended as a variant, explaining Moon Cleft's usage of the original coloration.