no whoever answered this was a dork lol!, anyway, when you get the master ball and your at a point where you want to use it, with your first Pokemon tell it to throw the master ball, then with your second Pokemon GO to your pokeballs and scroll down to master ball and press X or Y and it will ask you which one to swith it with, switch it with any other ball and exit and attack with that Pokemon, when you throw it it will throw a masterball and when you go back to your pokeballs you will still have a master ball, its amazing!!!!!!!!!!
Use action replay. Note: Dont use it
r4 or (i think its called) game shark and yes you can get gba games on r4
Technically there's infinite master balls because you can win one from the lottery in lilycove city in the dept store.
You cant.You can only get 2 master balls.
the cheat code only lets you have 999 master balls but it seems like there is infinite
From the store
go to the haunted marshes defeat the dragon master.He will give you 3 master balls and 1 rare candy.only works on sapphire.
cheating
you cant get sapphire master balls i thinck
cheat code to get infinite master balls fire red gameboy advance
no
be lucky in lottery