The Pokemon FireRed and LeafGreen: Super Music Collection features remastered versions of the original soundtracks.
The soundtrack is available on iTunes for $20.99.
The soundtracks from the original 2004 games have been adapted and orchestrated by composers Junichi Masuda, Gō Ichinose and Morikazu Aoki.
The Pokemon X & Y: Super Music Collection was also released on iTunes last month, with soundtracks planned for HeartGold, SoulSilver, Ruby, Sapphire, Diamond, Pearl, Black, White, Black 2 and White 2.
Pokemon X & Y was released worldwide on October 12, and in less than a month, the games have already reached several milestones.
In the first weekend the titles went on sale, more than four million units were sold worldwide in just two days.
In its first week on sale in Japan, Pokemon X & Y sold 1.8 million copies, beating Grand Theft Auto V to the top of the Japanese charts.
As of November, over 10 million Pokemon were traded between the two games.