Rattata (Japanese: コラッタ Koratta) is a Normal-type Pokémon introduced in Generation I.
Rattata is mouse-like, with large incisors and a whisker on both sides. Female Rattata have shorter whiskers than the males. The fur is purple, with a white or cream colored underside. Rattata have red eyes, with no obvious pupils. The tail is long, and curled slightly at the tip. Rattata have three-toed paws, which are the same color as its underbelly.
Rattata's teeth grow very quickly and they can survive almost anywhere. They also utilize their teeth so they can use attacks such as Super Fang and Bite.
Rattata evolves into a Raticate after reaching Level 20.