It has been announced that the game soundtracks for some of the previous 3rd, 4th and 5th generation games will be posted for download on the Japanese iTunes Store on July 25th, 2012. Each download set will cost 2400yen but single tracks can be purchased for 150yen a piece. These game soundtracks are currently available on CD except for the Pokémon Black 2 White 2 soundtrack which will be released on the same day.
Unfortunately, there isn't much of a price savings downloading the tracks instead of purchasing the CD. For instance, the Black 2 White 2 CD set is selling for 2,625yen, only 225 yen more than the digital download off of iTunes and you get the booklet, case and CD's.