ah yes a rock theme, totally fits with the character, another good example is N- I mean that Wally dude.

Battle! VS. Dialga/Palkia (Origin Form) — Pokémon Legends Arceus OST

Pokemon X & Y Champion Diantha Theme

Music belongs to Nintendo and Gamefreak nothing belongs to me!!!!!

The Gym Leader battle theme from Pokemon Black 2 and White 2 for Nintendo DS.

My top favorite theme in Pokemon Black and White. I only have the white version though.

From Pokeli. https://www.youtube.com/user/PkmnBWremix