Got to gamesradar.com and there will be a cheat code for 999 of every pokeball. Just click cheats, ds, p, and there you have alot of code and hints.
Action Replay
no you have to get action replay
get an action replay and it comes with that code
Action Replay.
With an Action Replay cheat
Its not possible
action replay
you have to have a Action Replay (avaliable at walmart), then go to youtube and type in "Action Replay Infinite Masterballs Cheat. PS: Action Replay normally costs 20$ and breaks easily.
Gameshark/action replay, or maybe hire 900 people to trade you masterballs.
Press l
get an action replay for 20$
go online and look it up I've got it on my action replay