Sableye

Sableye, art by Ken Sugimori. Om nom nom rocks.

Sableye is an official Dark/Ghost-type Pokémon introduced in Generation III. It is #302 in the National PokéDex.

It is found in Miato's Azure Valley, and is the start of the evolutionary line eventually leading into Gemineye.

It is also basically the adorable crystal-nomming version of Gollum.

For more information on Sableye, see its Bulbapedia entry.

Evolutionary Data:
Sableye → Crystalshard → Gemineye