Unfotunally I don't think it is as easy.. the battle themes are split into multiple sub-tracks and generate dynamically in-game. ..doesn't help that I can't even get a sample 'cause I dont have tamers to battle in omninesia xD
so hypoteticly if you found someone to co op with and get the samples it would make it easier? huh, thats a new vision on this i didnt had before, i tought people got this themes via data mining or smth like that
