Gastly

Gastly (ゴース Ghos) are a /-type Pokémon. Starting at level 25, Gastly can evolve into Haunter.

Appearance
Gastly's appearance consists of a dark sphere (its "head") surrounded by a light purple gas. A Gastly has two large eyes with tiny pupils and two vampire-like teeth. Its appearance is likely based on the Japanese concept of "hitodama".

Special Abilities
Gastly have the ability Levitate, which allows it to make all -type moves to miss. Gastly is made of a very thin, gas-like substance, which grants it certain powers and weaknesses. It can sneak into any place if it so wishes thanks to the invasive properties of gas molecules. It can also render itself nearly invisible and approach enemies undetected, and can envelop said enemies regardless of their size.

Anime
A Gastly appeared in EP023.