2 Master balls
Forgive me if I'm wrong but I'm pretty sure you can get 2 master balls without action replay or gameshark. But I'm not exactly sure because I haven't gone all the way through the game in a while. I restart mine once I get bored with it. I may be wrong but I know for a fact there is 1 in magma hideout(aqua on sapphire) and I think you get one for beating elite four but like I said I haven't beat elite four in a while because I restarted my game.
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