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.