Sentret

Sentret is a very common Normal-type Pokémon from Johto region. It can evolve into Furret when fed with 25 candies.

Trivia

 * Sentret, along with Hoothoot, Ledyba, Spinarak and Murkrow, is the most common Johto-region Pokémon to be found in wild.
 * Sentret is one of the Pokémon that Ditto can appear as in wild.