Level up Faster
There easier ways to get your character to a high level. For example you can use Kiss of #18 and Tenkaichi(title). Both of these level up all your abilities up by 4, but Kiss Of #18 also adds an extra Dragon Homing. In order to obtain these they can be found by summoning shenron(try a couple of times, if no there then return to selecting a saga so you don't lose a wish) or Puruga(less likely).
More tricks, tips and cheats for this game are right here - Dragon Ball Z: Budokai Tenkaichi 2 cheats
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