Before you find Dialga in Diamond or Palkia in Pearl or giratina in platinum, Cyrus will give you a master ball. I'm assuming this is so you can catch Palkia, Dialga, or Giratina.
Magic
download the cheat
Clone them using action replay
Buy an action replay works for Pokemon pearl dimond and platinum
first thing you can only have 900 master balls if you use cheats. you say you dont want with action replay, so i know that the R4 has cheats already build in so you can choose the cheats you want without any codes.
You cannot get that many master balls without an Action Replay. You are only allowed one per game.
you can't
you dont
you can't
cant
No
You cant you only get one ( without action replay )
you cant without a action replay
r4
You can't.
$#@! no
You can't.