Pokemon: The Origin

Synopsis

Two young trainers, Red and Blue, are called over by Professor Oak, who gives them a Pokedex, asking them to complete it with data from Pokemon all across the Kanto region. In exchange, he gives each of them a Pokemon partner, with Red choosing a Charmander and Blue choosing a Squirtle. After fighting several battles, catching wild Pokemon and acquiring data for his Pokedex along the way, Red soon comes up against Blue and is completely overpowered by his Squirtle. As Red feels dejected over his defeat, he meets a man who teaches him about the bond between trainers and Pokemon before directing him to a nearby town, Viridian City, where he can heal his Pokemon. Later arriving at Pewter City's Gym, he discovers the man he met before, the Gym Leader Brock, who offers to face him in a gym battle. After learning that his Fire-type Charmander is ineffective against Brock's Rock-type Geodude, Red manages to beat it with his Nidoran. However, Brock soon fights back with his Onix, who beats most of Red's Pokemon. Coming to understand the bond between trainers and Pokemon, Red manages to beat Onix with his Charmander, earning himself a Boulder Badge from Brock.

(Source: Wikipedia)