

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. However, later on, it was mentioned that the Pokédex entries were written by Professor Westwood of the Seafoam Islands. In the Pokémon continuity, the Pokédex was invented by Professor Oak, a respected professor in the science of Pokémon. The Pokédex in Pokémon Diamond and Pearl resembles a Nintendo DS Lite, with two screens and a microphone on the hinge.

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). In Pokémon Ruby and Sapphire, it is held horizontally, like a Game Boy Advance. The Pokédex in Pokémon Gold and Silver is also held vertically like a Game Boy Color. In Pokémon Red and Blue, it is held vertically, like the Game Boy. However, every version of the Pokédex has the ability to sort the list of Pokémon based on a National Pokédex numbering, as well as the numbering for their own region.Įach game has a different style of Pokédex, somewhat resembling the handheld it was released on. For example, later versions of the Pokédex are able to sort the list of Pokémon based on internal numbering or alphabetical order. With each generation of Pokémon games, the Pokédex has more advanced features compared to previous versions. There are four differently-numbered Pokédex modes to date: the Kanto Pokédex, introduced in Pokémon Red and Blue the Johto Pokédex, introduced in Pokémon Gold and Silver the Hoenn Pokédex, introduced in Pokémon Ruby and Sapphire and expanded upon in Pokémon FireRed and LeafGreen and the Sinnoh Pokédex, introduced in Pokémon Diamond and Pearl, the Unova Pokédex, introduced in Pokémon Black and White and updated in Pokemon Black 2 and White 2 and the Kalos Pokedex, which is split into Central Kalos, Mountain Kalos and Coastal Kalos based on the location in the region introduced in Pokemon X and Y. In the Pokémon anime, the Pokédex is a comprehensive, electronic, reference encyclopedia, usually referred to in order to deliver information necessary to the plot. People who have an Action Replay can use a cheat so they can get all Pokédex entries without even having the Pokémon. In the video games, whenever a Pokémon is first captured, its data will be added to a player's Pokédex.
