Crobat

Crobat (Japanese: クロバット Kurobatto) is a dual-type Poison/Flying Pokémon introduced in Generation II. It is the evolved form of Golbat and the final form of Zubat. Crobat is a purple, bat-like Pokémon with two pairs of wings. The upper wings are slightly larger, and the lower wings developed from its hind legs. It has long, pointed ears, yellow eyes with red pupils, and a small mouth that usually shows its teeth. Crobat is known for its exceptional flying abilities. It can fly long distances by alternating between its two sets of wings, and is very fast and silent. It is nocturnal, and hunts by biting prey with its sharp fangs and draining their blood. If it doesn't get enough blood, it becomes weak and unable to fly. On the ground, it's clumsy due to its lack of legs and can only crawl with its wings. Crobat is typically found in caves or on tree branches where it hangs upside down.