Mah favorite music in pokemon? Oh, geez well, there's alot...
R/B/Y: Trainer Battle, Gym Leader Battle, Cerulean City, The leveling up theme, Trainer Defeated theme, Route 10
G/S/C: Trainer Battle (Johto and Kanto) Gym Leader Battle (Johto and Kanto) Wild Pokemon Battle (Johto and Kanto) Team Rocket Battle, Rival Battle, Kimono Girls theme before battle, Dark Cave, Bike theme, Goldenrod City, Route 30, Route 36
R/S/E: Trainer Battle, Gym Leader Battle, Wild Pokemon Battle, Team Aqua and Magma Grunt Battle, Rival Battle, Elite Four Battle, Champion Battle, Frontier Brain Battle, Regi Battle, Mascot Trio battle, Hiker theme, Abandon Ship, Meteor Falls, Verdanturf Town, Fallarbor Town, Route 104, Route 110, Route 123 (This game had da best soundtrack in Pokemon
FR/LG: Trainer Battle, Gym Leader Battle, Champion Battle, Cerulean City, Route 10
D/P/PT: Trainer Battle, Gym Leader Battle, Wild Pokemon Battle, Champion Battle, Team Galactic Grunt Battle, Team Galactic Admin Battle, Team Galactic Boss Battle, Frontier Brain Battle, Diagla/Palkia Battle, Giratina Battle, Azelf/Mespirit/Uxie Battle, Trainer Defeated theme, Hiker Theme, Sandgem Town, Hearthome City, Canalave City, Route 201, Route 205, Route 206, Route 209, Route 210
HG/SS: Trainer Battle (Johto and Kanto) Gym Leader Battle (Johto and Kanto) Wild Pokemon Battle (Johto and Kanto) Team Rocket Battle, Rival Battle, Frontier Brain Battle, Lugia Battle, Kimono Girls theme before battle, Dark Cave, Bike theme, Goldenrod City, Cerulean City, Route 30, Route 36, Route 48
B/W: Trainer Battle, Gym Leader Battle, Wild Pokemon Battle, Legendary Pokemon Battle, Elite Four Battle, N battle, Prince N Battle, Route 1, Route 2, Route 10, Route 11 Dreamyard, Nacrene City, Lacunosa City, Accumula Town
B2/W2: Trainer Battle, Gym Leader Battle, Wild Pokemon Battle, Team Plasma Battle, Colress Battle, Ghetsis Battle, Legendary Pokemon Battle, Elite Four Battle, Kanto Gym Leader Battle, Johto Gym Leader Battle, Hoenn Gym Leader Battle, Sinnoh Gym Leader Battle, PWT Final Round, Route 1, Route 2, Route 10, Route 11, Route 19, Route 22, Dreamyard, Nacrene City, Lacunosa City, Accumula Town, Aspertia City, Virbank City