How do you unlock kid goku in dragon ball z budokai tenkaichi 2

it takes some steps but here it goes.
u need to go to majin buu saga and go back to the fight that goten and gohan train and you need to win him.
and the u get a new senerio called destine rivals.
in the senerio u need to beat grampa gohan in the look out tower.
you will be able to go to the look out tower in the fourth fight and wen u win him he will give u kid goku.

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