Pocket Monsters Zensho is a shounen 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)

Red is just a normal kid living in the rural Pallet Town, when he decides to go out on his own adventure, along with his rival since childhood, Green. In this world of Pokemon, he makes many friends, humans and Pokemon alike. However, all is not well. Team Rocket is trying to capture Mew, a very rare Pokemon, and is performing experiments on other Pokemon, trying to increase their power. Red and his friends must battle against Team Rocket to stop their cruel experiments and unlock the secrets of Pokemon.

10-year-old Satoshi, after finding a Pikachu messing with the wiring in his house, is on a journey to become the greatest Pokémon Master and to beat out his rival, Shigeru. Along the way, he meets with many other Pokémon trainers and advisors, including water-based trainer (and gym leader) Kasumi, ground- and rock-based trainer (and gym leader) Takeshi, and others.

A young boy named Satoshi embarks on a journey to become a "Pokémon Master" with his first Pokémon, Pikachu. Joining him on his travels are Takeshi, a girl-obsessed Rock Pokemon Trainer, and Kasumi, a tomboyish Water Pokémon Trainer who may have a crush on him. Satoshi and Co. end up traveling through various regions, including Kanto, the Orange Islands, and Johto, and then enter the Pokémon League competitions there. Along the way, they run into many confrontations with Musashi, Kojirou, and Nyarth, a trio of Pokémon thieves who are apart of an evil organization called "Team Rocket". But everytime Team Rocket try to do their evil deeds, they fail thanks to Satoshi and his Pokémon. 
(Source: Anime News Network)

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