Pocket Monsters Zensho is a shōnen Pokémon manga directly based on the Pokémon games. It was released in 1998. It follows the plot of Pokémon Red and Blue closer than any other Pokémon manga. Many details not included in other manga or the anime, such as the hunt for Safari Zone Warden's dentures, are covered. It was released in a single volume containing 10 chapters. It ends with the defeat of the Elite Four. (Source: Bulbapedia)
