The Pokédex (Japanese: ポケモン図鑑 illustrated Pokémon encyclopedia) is a digital encyclopedia created by Professor Oak as an invaluable tool to Pokémon Trainers in the Pokémon world. It gives information about all Pokémon species in the world that are contained in its database, although it differs in how it acquires and presents information over the different media. However, they are also only given to a few Trainers at a time, generally to the ones that are felt to have exceptional potential and skill. There are different types of Pokédexes and each Pokédex is special to a specific region.
Pokédex entries typically describe a Pokémon in only two or three sentences. They may give background information on the habitat or activities of a Pokémon in the wild or other information on the Pokémon's history or anatomy. Pokédex entries also include height, weight, cry, location, other forms, and a picture of the Pokémon.