Go to Dragon Arena, pick your Saibamen. Then fight the highest level Yamcha you can fight. If you selfdestruct on him he will automaticly die as he does in the series.
To defeat the z modes easily start DU and play it till your last with very easy level. Before your last match turn your level to z and then beat the final fight and you will complete the game on z mode.
At the level select press circle and you will get the destroyed version of a stage. (Doesn't work on the levels inside buu,world tournament arena and the hyporvolic time chamber.)
When you win the button press(Like when it says attack wins) and use an ultimate attack like gigantic meteor(Broly), Angry Explosion(Majin Buu), or Super Spirit Bomb(Goku) and kill you opponent with it;Their scouter lifebar will be shattered and broken.
Improving the odds for still needed capsules to appear.
Description
At 99%, it's quite annoying to wait hours for a last capsule. You can improve the odds by buying everything that appears for the kind of capsule your last capsule belongs to (ability/equipment/item). When having 9 of a capsule, it won't appear in the shop anymore until every capsule in that kind has 9 as well, therefore improving the odds for the remaining capsule to appear! It works for rare specials (>10000 zenie) as well!
Here's how this works, take any character (I did this with Gohan), start DU mode, enter a battle, fight it, and that battle should give you at least one level. Then, quit out of DU mode WITHOUT SAVING, I repeat, DO NOT SAVE your game. Start DU mode again with the same character, and if you notice, you'll have the same level you had when you quit, but are back at the same starting point!
The cards can either be bought in the shop after you spend a certain amount there, or found in Dragon Universe by a character of high enough level. In DU, the cards appear at the same place for each character every time. For Goku, (probably the easiest character to get them with) they appear on an island just West-Northwest of the main continent. It doesn't matter how many times you go through DU, it is your character level that matters.
Unlockable
How to Unlock
Black Membership Card
Character Lvl 30+, or spend 250,000 zenie in shop.
Gold Membership Card
Character Lvl 15+, or spend 100,000 zenie in shop.
Silver Membership Card
Character Lvl 2+, or spend 1,500 zenie in shop or have budokai 2 save.
When you unlock Uub (kill Kid Buu using the Spirit Bomb) he only has to fight 3 characters to end his game (you still get credit when fighting on super hard, Z, Z2, and Z3). However, dont collect the dragonballs after the first time you beat DU otherwise you will have to fight Omega Shrenron which is nearly impossible to do in any of the Z modes.
To get this Potara you have to play with Gohan (Adult) in the second time (DU). Do the same thing to get Supreme Kai. After the Battle with Fat Buu, you have to win this battle and then don't go to the red point. Go to Central City and next go to west cost and in a island no much big winth trees you found Potara's Supreme Kai.