Sableye

Sableye (ヤミラミ Yamirami) is a /-type Pokémon and has no evolutionary forms.

Special Abilities
Its special abilities are either Keen Eye or Stall. It hides in the darkness of caves. Its diet of gems has transformed its eyes into gemstones. It has the abilities Dark/Ghost, like Spiritomb, so it has no weaknesses. It doesn't have Wonder Guard so it could still faint.

Appearance
Sableye has deep, purple colored fur with little claws, pointed ears, and sharp teeth. It also had two big gemstones over its eyes, with a gem on its tummy and three gems on its back. It resembles a Hopkinsville goblin.

In the Anime
Sableye first appeared in Ready, Willing, and Sableye. The Darkness Pokémon was playing jokes on Ash and his friends.

Cassidy's Sableye made a small appearance in Oaknapped.

Pokémon Mystery Dungeon
In this game the Sableye are the servants of Dusknoir, and are constantly spying on and trying to capture the player Pokémon in the world of the future.

Trivia

 * Sableye is the first of the two Pokémon that cannot be hit super effectively under normal conditions, Spiritomb being the other.
 * Because of this, if a cheat device is used to give Sableye the Wonder Guard ability, it will become invincible. Except when a Pokémon knows Foresight and another Fighting type move.
 * The word Sable is an adjective commonly used to describe the black fur of some animals.
 * Sableye was a version exclusive to sapphire similarly it is considered a HeartGold exclusive though it can be caught on the pokewalker route: rally (only obtainable by event).