I dont think you can
you can use a game shark to get unlimited master balls
You can NOT get 99 Master Balls unless you have a gameshark.
Just use the program "A-Mart"
same way you catch all the other Pokemon keep trying with like ultra balls or great balls or even pokeballs just go to cerulean cave find your way around save before him so you can reset if you accidentally kill him. just bring his health down really low put him to sleep so he cant use recover and catch him
Use master balls. Use a ton of ultra balls and put them to sleep or paralyze but master balls are your best bet since leaf green is harder than its original counterpart
"What do you use premier balls for on Pokemon leaf green?"On Pokemon leafgreen you use premier balls to catch Pokemon.They are a fancier version of the pokeball.How to obtain: Buy 10 pokeballs and receive 1 premier ball as a gift.
Or, you could try not cheating and play the game?
There is no master ball code in leaf green. And my advice, don't CHEAT!! If you cheat then what is the point of playing the game.
Here is the (M) code00000554000A101DC9B00007830050000000830050020000when you use the code you will have 99 of all balls including (master balls and safari balls)420259D800010001000C0004420259DA52120000000C0004
You have to use Pokeballs, Great Balls, Ultra Ballsect.Many Pokemon can't be caught in Leaf Green, like Mew unless you go to an event, but all events for Leaf Green and Fire Red have ended.
8202583c 0001 8202583e 0063
well what you have to do is beat the elite four get mewtwo and buy ten pokeballs at whatever store and then talk to prof. oak and go to a poke mart and buy this time a ultra ball and then check your menu and poof there it is and im not lying this cheat is for Pokemon fire red and leaf green