Ok, first of all, you have to have at least 2 Game Boy Advances; one with Leaf Green and one with Fire Red. On Fire Red, have one Master Ball, but don't use it yet. Let a Pokemon (any) hold it. Now, be sure to have the Master Ball in Leaf Green, from Silph. Co. If you do, be sure to have a Ditto, and make the Ditto hold it. Trade Ditto to Fire Red, which you have to have a trade device to trade. I believe you can get one at Walmart, GameStop, or possibly Ebay.com. Now, connect the two plugs on both Game Boy Advances, the left side on Fire Red (or Leaf Green) and the right side on Leaf Green (or Fire Red). Now, turn on Fire Red, and go to the nearest Pokemon Center. Go to the second floor, and go to the far right corner, which is the Trade Colosseum. Talk to the lady at the desk, and she will ask you to save. Do as instructed, and then it will say, "Awaiting Linkup: B- Exit." Now, after doing this, turn on Leaf Green, and go to the nearest Pokemon Center as well, and do the same as you did for Fire Red. NOTE: Be sure to have your Ditto holding the Master Ball in Leaf Green, and have the Pokemon in Fire Red holding the Master Ball too. (Any Pokemon; I would choose Pikachu) Now, choose a Pokemon like a Rattata, that you don't wish to have anymore, and trade that Rattata, from Fire Red to Leaf Green, in exchange for Leaf Green's Ditto. Now, you have 2 Master Balls; one Ditto holding one, and another Pokemon holding another Master Ball. But we aren't done yet; once you have both Ditto and the other Pokemon with you in your pack, go to, Four Island I think it is, and give both Ditto, and your Pokemon/Pikachu to the Day Care Lady and her husband.
NOTE: Before doing this, make sure both Pokemon, Ditto and the other miscellaneous Pokemon you have, are holding their Master Balls. Now, give the Day Care Lady the two Pokemon. After this, go walk around a lot, or even beat the Elite Four again, or even fighting trainers the 2nd time, and then, go check on Four Island, and you'll know if the Day Care Man has an egg for you if he is a step outside of the entrance to it. He will give you an egg. Once the egg hatches, it is rumored that the baby Pokemon will as well, be holding a Master Ball too. If this procedure works, keep doing it, until you have a lot of baby Pokemon with Master Balls, and take them from them, and as well as from the Leaf Green's Ditto, and your Fire Red Pokemon. You may do this procedure many times, but test it out first before trying. If it works, then congrats! You can do it over and over, and get as many Master Balls you want! REMEMBER, this is not a hack. It is a simple concept that people over the years figured out. I am not a really really good Pokemon Expert, but please do not be mean to me if I am wrong about this concept. If you wish to not do this procedure, you can make a Pokemon from Leaf Green hold a Master Ball, and trade a Pokemon over that you don't need to Leaf Green, and retrieve the Master Ball from the Pokemon holding it. This procedure will take much longer, which means, you can't get the Master Ball twice in one game, so it means you'll have to start the whole game over again, and get the Master Ball again, and doing this procedure again, until you have the wanted amount of Master Balls. I suggest using the first procedure, and if it doesn't work, you should try the second procedure. Good luck! Hope this helped! Peace out! ~ Anonymous :)
you can't without cheating
use a game shark
sorry, theres only one per game.
you need to buy a master ball or find one you cant make a master ball
Cheat but to get more master balls you can get some from other games all you do is make a Pokemon hold the master ball and trade it to firered and boom you get another masterball.
no you have to get master balls on other firered games attach them to Pokemon and trade them on to your acountTo get more stars in fire red you can get it by doing Pokemon jump & get a 100 or 200 jumps
all i know is when you use a gameshark code or beat the elite four 10 times and go to south of pallet town where you will catch a tangela nad talk to professor oak he will give you 3 or more master balls depending on how many tangela you catch
There is only one master ball in Pokemon diamond. But there is a cheat for getting a WHOLE lot more. Look it up at how do you get 98 master balls? I don't know where the master ball is I think it's in a team galatic headquarters.
well the max of master balls you can get is 999 but you can only get more master balls in trades.
Have your friends trade you the master balls they got.
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No but you can get more.