How do you get the master roshis pupil in Dragon Ball Z budokai tenkaichi 2

first you have to have your dragon ball z game in the ps2 then select story mode then fight grandpa gohan on kami's lookout then go kill yamcha for 1 million of zeni then combine master roshi's pupil with fox mask to get grandpa gohan then you have to put health plus 10 on him and defense plus 15 and speed plus 100 when you fight grandpa gohan to win master roshi's pupil then have 3 million zeni before killing yamcha to get grandpa gohan
if you beat shenron then you will be able to wish for it