Dragon Ball Z Budokai 2

Enter the Skill Shop while holding down the L2 button. Bulma will talk, but just leave, while holding the L2 button still. Re-enter the shop, repeat the trick over and over and your percent of your Capsules keeps increasing. This also unlocks characters for you, Breakthrough capsules, fusions, everything.

In level 5, you will see that Babidi makes Vegeta evil. He will become a permanent super saiyan with the M symbol on his forehead. Use Goku to defeat Majin Vegeta before the kili meter becomes full. You will unlock him. Majin Vegeta has a new move: ATOMIC BLAST.

Collect the dragonballs and earn the breakthroughs for Goku, Hercule/Sataan, Yamcha, Tien, and The Supreme Kai/Kaio Shin. After that, gather the dragonballs again and earn their fusion capsules.

On Stage 11 in DragonWorld, collect the Potara earrings from the Supreme Kai. Then the Supreme Kai will bring Vegeta back to life. Then make Goku and Vegeta come on the same map location and then they will fuse. You will then gain that skill.

Go to Edit Skills from the Main Menu. Go to Edit Capsules and choose the skill SENZU BEAN in the custom tray of any charachter. There are total 7 spots in the custom tray and this skill takes up 3 spots so choose your other 4 skills wisely. Now fight in any mode (duel, world tournament, dragon world). When you are fighting some tough charachters you might die. But you as soon as your life ends you will get back up and have 3 more bars of life. That makes 6 bars for you. This is extremely useful in Dragon World when you are fighting Super Buu (Gohan absorbed) with Hercule to unlock Videl. Note: When you have entered the BREAKTHROUGH skill in the custom tray of your charachter, the SENZU Bean skill won't come into effect. So remember that you can only use it separately.