Gaming Beyblade 2002 Team battle help

[Rokubato]

Hello everyone!
I am now in japan and felt nostalgic, so I bought some old Ga game

one of them is Bakuten Shoot Beyblade 2002: Daichi Version

So two things I wanna ask,
As far as I can remember, it was hard as hell to get more team members , but then again, it's all in Japanese
Anyone knows a way to get new members? I fought like 200 battles and still nothing..

The other thing is the music
I simply love the soundtrack, anywhere I can download it? or maybe hack a rom to get it somehow?

Thanks!