FREE: Pokemon Sinnoh Pokedex (Jakks Pacific 2007) Handheld Game

Each game has a different style Pokédex, somewhat resembling the handheld it was released on. In Pokémon Red and Blue it is held vertically, like the Game Boy. The Pokédex in Pokémon Gold and Silver is also held vertically like a Game Boy Color. In Pokémon Ruby and Sapphire it is held horizontally, like a Game Boy Advance. The one in Pokémon FireRed and LeafGreen is horizontal with a fliptop, like a Game Boy Advance SP (although the GBA SP is actually vertical in design). The Pokédex in Pokémon Diamond and Pearl resembles a Nintendo DS Lite, with two screens and a microphone on the hinge.

In the Pokémon continuity, the Pokédex was invented by Professor Oak, a respected professor in the science of Pokémon. However, later on, it was mentioned that the Pokédex entries were written by Professor Westwood of the Seafoam Islands. The movie Pokémon 4Ever explains how Professor Oak travels into the future when he is a small child and Ash Ketchum gives him the idea to create the Pokédex. The Pokédex is given to you by Professor Oak, Elm, Birch, Rowan, or Juniper in the video games at the beginning of your journey.

In addition, the term "Pokédex" has expanded to refer to any comprehensive guide to Pokémon in the video games, more specifically a listing of Pokémon detailing information such as their stats, locations found, moves learned, and Egg Groups. Numerous versions of this type of Pokédex can be found both online (i.e. on serebii.net) and in printed book form (i.e. the Prima Pocket Pokédex). This detailed information also includes height, weight, species type, and a short description of the Pokémon.

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