Okay, if you haven't listened to this by now, you need to go do that because it is amazing. Baxton Burks (or 'Skotein') reorchestrated the entire soundtrack of the Red/Blue/Yellow games. It sounds like it could be an official film score. It really captures that magical journey feeling I had back when I played the original games, and I love it so much! Here's four of my favorite tracks, along with Youtube links.
Lavender Town: [link]
My absolute favorite out of the whole thing. That section of the game always stood out to me. It was just so different, creepy, and melancholy. It introduced the player to the fact that, yes, Pokemon can die, and that someone needs to do something about Team Rocket. I love how the music really captured that spooky, mournful atmosphere.
Mt. Moon: [link]
Love the flow of this one. Starts out like a dark mysterious cave adventure, then slowly descends into soft sneaking tunes before exploding into the menacing jazzy Rocket Hideout theme.
Silph Co: [link]
Again, the flow is wonderful, really capturing the essence of a suspenseful, tense, and rather dangerous situation.
Final Showdown: [link]
The build up is simply fantastic. Truly epic.