Pokémon FireRed Version and LeafGreen Version (ポケットモンスター ファイアレッド・リーフグリーン Poketto Monsutā Faiareddo Rīfugurīn?, lit. "Pocket Monsters: FireRed & LeafGreen") are enhanced remakes of the original Pokémon Red and Blue video games, which released in 1996. The new titles were developed by Game Freak and published by Nintendo for the Game Boy Advance and have compatibility with the Game Boy Advance Wireless Adapter, which originally came bundled with the games. FireRed and LeafGreen were first released in Japan in January 2004 and released to North America and Europe in September and October respectively. Nearly two years after their original release, Nintendo re-marketed them as Player's Choice titles.
FireRed and LeafGreen are members of the Pokémon series of role-playing video games. As in previous games, the player controls the player character from an overhead perspective, and participates in turn-based combat encounters. However, new features such as a contextual help menu and a new region the player may access have also been added. Throughout the games, the player captures and raises Pokémon for use in battle.
The games received mostly positive reviews, obtaining an aggregate score of 81 percent on Metacritic. Most critics praised the fact that the games introduced new features while still maintaining the traditional gameplay of the series. Reception of the graphics and audio was more mixed, with some reviewers complaining that they were too simplistic and not much of an improvement over the previous games, Pokémon Ruby and Sapphire. FireRed and LeafGreen were commercial successes, selling a total of around 12 million copies worldwide.

-from "http://en.wikipedia.org/wiki/Pok%C3%A9mon_FireRed_and_LeafGreen"