you can't
The best would be the "Battle Factory" with 5 Bp
You have to have an action replay for that. You can look up the code by asking what is the action replay code for ............{...... means what you are trying to find a code for}
The Choice Band can be bought from a vendor on Pokemon Platinum in the Battle Frontier for 48 BP. To get BP simply take part in the various special battle arenas within the Frontier.
You can buy it at the Battle Frontier for 48 BP.
That's easy. You battle For BP. Battle Points short for BP. You can trade BP for a lot of stuff. By Kha111
The Battle Factory
the one which is right ahead
on rout 228 -.- Bp
You can find them in various places, or at the Battle Frontier in exchange for 42 BP.
you can get candys at the battle front for bp or use an action replay
Route 212, Victory Road, Battle Frontier (u need BP points)
TM30 Shadow Ball is found on Route 210 or buy spending BP in the Battle Frontier shop.