Which theme(s) are you favorite from the entire Pokémon series?
It was a tough choice for me, with the Emerald Frontier Brain music, or the HG/SS/G/S/C Kanto Gym Leader music, but the second wound up winning.
Links:
HG/SS:
http://www.youtube.com/watch?v=wMkqrRNu2cQ
G/S/C:
http://www.youtube.com/watch?v=V5d76uYVEFo