What is your best Pokèmon game battle music?

I play Pokèmon since 1998, i start with blue and red. My favourite was and still Pokèmon Emerald from 2005 . I played a lot of recent games on Emulators, but for me is not the same as the 1°,2° and 3° generation.
Btw, what's your favorite Battle song? I really like the Rayquaza(also my favourite legendary Pokèmon) battle back in the day and the Volo theme in Arceus