my top 10 for Ruby, Sapphire and Emerald
1. Elite Four theme: the best "pump you up for an epic fight" song in any video game ive played
2. Battle Vs. Groudon Kyogre and Rayquaza: MOST EPIC TIMPANI PART IVE EVER HEARD AND I WANT TO LEARN TO PLAY IT SO BADLY!
3 Battle! Vs. Frontier Brain: Fast paced, gets you in the mood to open a can of whoop ***.
4 Vs. Deoxys: has that outerspacey techno-ey sound that is very fitting for deoxys's origins
5. Battle Vs Regirock/steel/ice: upbeat gets your heart pumping.
6: End Credits (RSE): gives me that feeling of reflecting on the wonderful journey ive had, the pokemon ive bonded with and amazing journeys to come.
7: Route 111 Desert: has that middle eastern feel to it that i always enjoy in any musical medium. definately my favorite style of music to play on mallet percussion, specifically xylophone.
8: Champion Battle (RSE) the intro gives you the sense of a frantic chaotic battle that the tides of who has the advantage could change at any moment.
9: Gym Leader (RSE): Just an amazing song
10: Slateport City: the begining of the song with the chimes, in my opinion, could have been used for the end credits or at least be a portion of the song itself with its cheerful fanfare at the beginning
without a doubt, Gen 3, specifically RSE had the best music of any pokemon game