Afrodisiac
break up w yo gf, im bored
When I think battle songs Mezase Pokemon master is near the bottom of the list. It'll be XY&Z and we all know it.
It's not really suited for a battle, but it might play when Ash is declared the champion. It might be a great parallel with the moment when Ash left the Sekiei Conference (i think the song played at that very moment)