Level Power Trick
Enter these codes before a fight when your character is talking to the enemy.
1 Up, L, Down, Y
2 Left, L, R, Right
3 Down, X, Up, R
4 L, R, Up, Down,Y, X, Left, right
5 Up, L, Up, R, Up, Y, Up, X
6 Left, R, Up, X, Right, Y, Down, L
Note: enter these codes relatively slow.
Play as Adult Trunks
At the intro, (where Vegeta fades into Gokuu) press Up, X, Down, B, L, Y, R, A. You will hear
a small "whacking" sound and in the character selection screen, adult Trunks will be right above Majiin Buu.
Super Turbo Mode
For a greater challenge, hold X+R+L at the start of the game.
For turbo mode, hold X+R at the start of the game.