Typically, this is handled with a cheating card reader.
ActionReplay is standard in the industry of accessories such as that.
You cannot duplicate master balls.
You cannot duplicate master balls. You only get one handed to you. That is all you will receive.
You cannot duplicate Master Balls in any Pokemon game.
No. However, you can clone a Master Ball on Emerald. There are also codes to get multiple Master Balls.
By hacking then yes not hacking no
You can't have unlimited master balls although u can give the master ball to a Pokemon and duplicate it at battle frontier
Duplicate Pokemon with a masterball attached to them.
There is no unlimited Master Balls cheat, but maybe you're talking about using an ActionReplay/GameShark. I wouldn't know about those. There is a way to duplicate Master Balls though, but that is only available in Emerald Version.
Hack the game otherwise, it's impossible.
I dont think you can inless you have action replay. hope this helped
No, I'm afraid you can't without an Action Replay DS or DSi.
Duplicating master balls on Crystal at PlayR, is best learned by trial and error. Short cuts such as cheat codes are considered by consensus to be unethical and are strongly discouraged.