One of the many Pokémon characters, Bidoof was introduced in the Diamond/Pearl generation, where it was Pokedex #015. Bidoof is roughly based on real-world gophers, and Pokedex entries make it clear that like gophers and beavers, they must gnaw on things fairly frequently because their teeth never stop growing. The tail of a male Bidoof consists of five tufts of fur, while a female's tail only consists of three. It evolves into Bibarel at level 15.
Bidoof is Diamond/Pearl's entry in a long-running tradition of featuring a small Normal-type Pokemon with a two-stage evolution that appears commonly in the area around the starting town of the game (other such Pokemon include Rattata and Zigzagoon).
Unlike those other Pokemon, however, Bidoof is near-universally hated among the Pokemon fanbase, partially due to the fact that, like those other Rattata-style Pokemon, Bidoof is widely regarded as weak and useless, but mainly due to the fact that it appears quite frequently in regions all over that game's map.