In Pokémon 4Ever, Sammy Oak travelled to the future and met the future Ash Ketchum, who explained the Pokédex to him and gave young Oak the idea. 40 years later, Oak invented this device himself and it was programmed by Professor Westwood V. He later gave it to new Pokémon Trainers, including Ash himself and Professor Elm, Professor Birch, Professor Rowan and Professor Juniper soon created their own Pokédexes for new trainers.
Types of PokédexEdit
The Kanto Pokédex has lots of buttons, information on Wild Pokémon and even a switch that activates an exchange between Pokémon stored at Professor Oak's Laboratory and those On hand. Ash's Pokédex and Gary's Pokédex were both red. During Ash and May's travels through the Kanto Battle Frontier, it was redesigned with icons on the left and a panel on the right to scan Pokémon. Ash's Pokédex was red and May's Pokédex was yellow.
The Johto Pokédex was more straight and has few buttons to scan Pokémon. Ash's Pokédex, Gary's Pokédex and Ritchie's Pokédex are all red. During Ash's travels through Sinnoh, the Johto Pokédex was redesigned, with a more handheld feature and two screens, one to select the Pokémon and one to see the Pokémon. Khoury's Pokédex was red, black and blue and Lyra's Pokédex was pink, white and blue.
The Hoenn Pokédex has a green button on it to tell when it is on, and two buttons to select the Pokemon. On the left is a Poké Ball-shaped button on it to select the gender and indentity of the Pokémon. Ash and May's Pokédexes were both red.
The Sinnoh Pokédex has a system to select info on Pokémon, and two screens to show pictures of the Pokémon. It also has an extendable system to scan a Poké Ball and see what moves the Caught Pokémon can use. Ash's Pokédex was red and black, Dawn's Pokédex was pink and white, Mamie's Pokédex was lavender and Paul's Pokédex was black and grey.
The Unova Pokédex has an extendable second screen to show pictures of Pokémon and the first screen shows small pictures and words about the Pokémon. It also has a Poké Ball-shaped control to see the Pokémon. Ash's Pokédex and Trip's Pokédex are both red and black and Bianca's Pokédex and Dawn's Pokédex are pink and white.