Dragonball Wishes
When you have all 7 Dragonballs and you summon either Shenron (Earth) or Porunga (Namek) a selection of items can be selected by you as a wish. If you don't like any of them or already have them and are wanting to get something you don't aready have so you can get 100% in the item list, just press start and choose "select scenario". Choose the scenario you want and summon one of the dragons again. If you still don't like the wishes available, just repeat this process.
We have more cheats and tips for this game here, Dragon Ball Z: Budokai Tenkaichi 2 cheats
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