Beldum

Beldum (Japanese: ダンバル Danbaru) is a /-type Pokémon introduced in Generation III.

Physiology
Beldum is a long, robotic Pokémon with three claw-like appendages on its backside. Beldum has but merely one, red eye. It's eye is on a sphere that is attached to the rest of its body.

Special Abilities
Beldum uses magnetism to move, communicate, and attack. In the game, Beldum has the ability "Clear Body", which prevents any of its stats from being lowered.

Evolution
Beldum evolves into Metang once it reaches level 20, and evolves into Metagross starting at level 45.

Anime
One of Ash's main rivals in the Hoenn region, Morrison, had a Beldum that soon evolved into a Metang.

Trivia

 * Beldum and its evolutions are the only non-legendary Pokémon to have a catch rate of 3.