Pokemon X is a combination of Spiritomb, Sableye, and Shedinja. It has the body of Spiritomb as a head, with the "ears" of Sableye and the "wings" of Shedinja. Instead of Spiritomb`s green orbs, they are replaced by the gem on Sableye`s chest repeated multiple times. He has the arms and legs of Sableye colored, like its head and two sets of ears, similar to Shedinja.
Pokemon X can`t evolve whatsoever.
It is a feared combination of Spiritomb, Sableye, and Shedinja that can`t be harmed by any attack. It is very mischevious and deceptive. It dwells in a dark cave that was thought to never exist, or did exist but is invisible to non-ghost types and non-dark type pokemon. It is said to steal the spirit of whatever it looks at, as well as the spirit of whatever is looking at it when angry. The more crystals in its cave it eats and spirits it absorbs, the more crystal orbs appear on its head, which can light up a cave. It appears to be unable to breathe or move much.