How do you create your own action replay DS codes

heres a code 4 u use 4 999 master balls: 94000130 fcff0000
b21c4d28 00000000
b0000004 00000000
00000f4c 03e70001
d2000000 00000000
Rare Candy x999 : 94000130 fcff0000
b21c4d28 00000000
b0000004 00000000
00000dac 03e70032
d2000000 00000000 Precious Ball x999: 94000130 fcff0000
b21c4d28 00000000
b0000004 00000000
00000f4c 03e70010
d2000000 00000000 hope i helped