Pokemon Red/Blue Version...

Red Version came out in 1998 along with Blue Version. It was the first Pokémon game to feature humans (trainers) battling against each other with pokémon. This was a very popluar game back then, due to it being the first major game of this type.

In the game, Red is a curious 10-year-old boy from Pallet Town. Red becomes interested in Pokémon after his best friend, Blue, stops playing with him and begins bullying him. His adventure begins one day when Professor Oak calls the two of them to his lab and gives them each a choice of Pokémon. After receiving their Pokémon, Blue challenges Red to a battle. Later, Professor Oak summons both Red and Blue and gives them both a Pokédex each, and sends them on a journey to fulfil his dream of capturing every type of Pokémon.

Red travels all over Kanto, filling in the Pokédex and defeating Gym Leaders. His rival Blue is consistently one step ahead, and appears many times to impede Red's progress. When Red eventually reaches the Elite Four, he finds that Blue has defeated them beforehand and has become the league champion. Red defeats Blue in a final battle, and becomes the champion himself.

Other than Blue, Red's main conflict in the games is Team Rocket, an infamous criminal organisation. Red clashes with Team Rocket many times in his quest and eventually successfully foils their plan for world domination, consequently causing the organization to disband and their leader Giovanni to go into exile. However, several members remain on Chrono Island, unaware of their organisation's dissolution and are defeated by Red. Three years later, they reform in Johto and attempt to contact Giovanni and revive Team Rocket.

(Wikipedia)