Rattata is a small, quadruped, but nonspecializing rodent. Its most notable feature is its large teeth. Like most rodents, their teeth grow continuously throughout their lives, and must be constantly worn down by gnawing. It has long whiskers and a long, slightly curled tail. Rattata has purple fur on its back, and cream-colored fur on its stomach. This coloration (dark on top, light on bottom) is a common protective mechanism for many small animals.
Females have shorter whiskers and a lighter fur color.
Rattata have very basic survival needs, permitting them to thrive in nearly any environment. Because they reproduce so quickly, a pair of Rattata can quickly colonize an area. Rattata are also very quick.
Rattata have a fast metabolism. As a result, it spends most of its fast-paced life looking for food. Thanks to their sharp fangs, they are able to eat nearly anything. However, because they constantly need to chew on hard material to keep their teeth at a manageable length, it is hard to tell if they are actually eating something, or merely gnawing on it. When they are threatened, Rattata can deliver a powerful bite. Cautious to the extreme, its hardy vitality lets it live in any kind of environment. They are a common sight in many places, and can become a nuisance due to their rapid reproductive rate. It is said that for every one Rattata, forty other are hidden somewhere. Most young Trainers will train Rattata due to their easy accessibility.
Rattata naturally live in plains and savannas. However, they are found in most areas due to their ability to survive nearly any environment. They are very common in Kanto and Johto.
Rattata are not picky when it comes to food, and will eat nearly anything edible.
This Pokémon was unavailable prior to Generation I.