Would it work? Been playing some Theatrythm Final Fantasy and the idea came across my mind. The franchise seems to be pretty open to new genres in the spin-offs (dungeon crawler, fighting game, strategy, puzzle, even racing etc) so I can't see why not. There are amazing Pokemon tracks, they could put them to good use.

I can definitely see it working similarly to Theatrhythm. You'd have "battles" with wild Pokemon and gym leaders, where you basically play the battle theme of your enemy. If you're fighting a Zigzagoon, you play the Hoenn wild battle theme for example. And while you're traveling from city to city, you play the route/town theme for the location you're currently on. It'd be a fairly simple game to make, really - 100 or 150 songs would be enough.

What do you think? Do you see any chance of this happening in the future?