Have your friends trade you the master balls they got.
well the max of master balls you can get is 999 but you can only get more master balls in trades.
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
No
buy them at walmart
give one to a Pokemon and trade the Pokemon with the master ball.
You trade Pokemon from friends that's Pokemon is holding a master ball
more like 493 master balls. its a cheat on the AR look up the code for it. its called Pokemon modifier.
Pokemon lotery and action replay
use a game shark
action replay
Hacking