If you're having trouble deciding, I recommend referencing ObitoTube's videos.
>Wild BattleDPPt
https://www.youtube.com/watch?v=rG7wDSt1HEU>Trainer BattleRSE
https://www.youtube.com/watch?v=-cQKhYFFxLc>Rival BattleGSC (vs. Silver)
https://www.youtube.com/watch?v=iFwXt1PAEOg>Gym BattleBW (excepting final Pokemon transition), with GSC (vs. Kanto) close second
https://www.youtube.com/watch?v=Rl6A4oGpOSw>Grunt BattleBW
https://www.youtube.com/watch?v=D3Biw2hvjas>Admin BattleHgSs, honorable mention to BW2 trailer version of Colress's theme
https://www.youtube.com/watch?v=JHnJWAELi3A>Boss BattleDPPt, or OrAs if it didn't exist
https://www.youtube.com/watch?v=EClJXtk05-8>Legendary (major [box legendary])XY (so good it had to be ripped off for Gen VII), OrAs close second
https://www.youtube.com/watch?v=5U3qfV6coW8>Legendary (minor)BW
https://www.youtube.com/watch?v=o20vpORCWdI>Elite Four BattleSM and BW and HgSs tie for now, I can't choose
>Champion BattleRSE
https://www.youtube.com/watch?v=duqctwQXn7M>Battle Facility Battle (Frontier, PWT, etc.)I'd have to say DPPt Frontier Brain
https://www.youtube.com/watch?v=W_4nBxJY5kM>Other BattleZinnia's theme, hands down
https://www.youtube.com/watch?v=GIn8_Q27WFYRate my taste
