Well, on the first generation games there was the glitch with Missingno. Where you'd have the man show you how to catch Pokemon, then fly to Fuchsia, then surf to the Seafoam Islands and surf along the coast until you saw it, then the 6th item in your inventory would be like 129x. I don't believe there are any other ways of getting more Masterballs. You could also use a GameShark.
With an Action Replay cheat
Its not possible
clone a pkmn holding one!
The only you can get unlimited masterballs is to use an Action Replay deivce. It's sold at places like Walmart.
you get unlimited master balls by using action replay and put on master balls x999
You would have to get really lucky through the in-game lottery or trade them over from other games.
win the lotto
you cant you need a game shark. action replay is for ds games not gameboy.
there is not one
Action Replay
no you have to get action replay
there is no way to do that... where did you see this?