A new album by Skotein has been released, and it consists of the orchestrated remixes of all 35 songs found in Pokémon Red/Blue/Yellow. You can buy it for 10$ on iTunes. Here's where you can buy it. You can also hear the previews in that page.
I tell you, if you're a big Pokémon fan, you can't miss this. It's just too epic. I've only heard the first 10 songs and I've already cried twice out of nostalgia. It really is worth it, you won't regret buying it.