Generation I

Generation I of Pokémon is the first generation of the series, in which the Kanto region is featured. It debuted in Japan in 1996 with Pokémon Red and Pokémon Green. It was then followed up by Pokémon Blue later that year, and special edition Pokémon Yellow in 1998. The rest of the world got a sort of combination of Red, Green, and Blue in Pokémon Red and Pokémon Blue, which was also followed up by Pokémon Yellow.