Green is one of the four Pokedex Holders from Kanto. He was the second main character to appear in the series after Red, based directly on the rival character from the first generation of Pokemon games.
Green is the grandson of Professor Oak, who trained him to be a world champion trainer. Green studied overseas for a long time before beginning his journey as a trainer.
Charmander is the first Pokemon seen in his team, when he uses it to battle Mew. Green's Charizard