 The name "Pokédex" is a portmanteau of "Pokémon "and "index".In the video games, whenever a Pokémon is first caught, its height, weight, species type, and a short description will be added to a player's Pokédex.Each region has its own Pokédex, which differ in appearance, species of Pokémon catalogued, and functions such as the ability to sort the list of Pokémon based on alphabetical order or display the Pokémon's size compared to the player character.