The Pokédex is a tool used by Pokémon trainers all around the Pokémon world in different regions. These regions include the Unova region, the Sinnoh region, the Hoenn region, the Johto region and the Kanto region. The Pokédex makes records of information about each of the different Pokémon. There are 801 different species of Pokémon recorded in the world today. Different Pokémon are caught in different regions and some Pokémon can only be caught in certain regions, such as Xerneas in the Kalos Region.