The remastered soundtrack to the 2011 Nintendo DS titles includes compositions by Junichi Masuda, Shota Kageyama, Hitomi Satō, Gō Ichinose, Morikazu Aoki, Minako Adachi, and Satoshi Nohara. The soundtrack is arranged by Shota Kageyama, Hitomi Satō, Gō Ichinose, and Minako Adachi. (I wonder how they would have fit all that on a CD spine?)
The soundtrack comes two months after the release of Pokémon Ruby & Pokémon Sapphire score. There are six Pokémon albums now available to download on iTunes, with Black 2 & White 2 also due for release soon.
Current list of Pokémon soundtracks on iTunes: