How do you get 999 master balls in Pokemon heart gold?

Answer 1

First, catch 10 Magikarp and put them in box 10 by themselves. (note they must all be caught using ultra balls). Save the game a total amount of 10 times (note this whole process must be in Azalea Town). Then you must talk to the daycare person 100 times for every masterball you want. The master balls appear in your Pokemon box, held by the magikarp you recently caught. (please note that you can only do this game glitch for 10 master balls at a time as that is the only loophole in the hexadecimal codes for the game.) Once you have obtained all your masterballs from the magikarp, you must repeat the process although you do not need to re-catch the magikarp, just move them from box 10 and then put them back in there.