Get as much Master skills as you want and it's easy.
First this cheat will only work everytime you turn on your game make sure you beat the 100 ranking first for this cheat to work.
After beating the 100 ranking choose any charactor and go to the ultimate battle again. Then this time choose training. After you fight your first charactor it will give you 3 options.
Choose exit training.after it you finish mr. Satan will give you a master skill. Repeat it just beat one charactor and exit the training and it will keep giving you master skills.
Now I have 50 master skills and I colud get to 100 if I want to.
Note: if you want it to work again you mast beat 100 ranking every time you turn the game on.
We have more cheats and tips for this game here, Dragon Ball Z: Budokai Tenkaichi cheats
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