Battle Stadium D.O.N
Gain money by doing missions, then go to the slot machine. Get three of the Shonen Jump signs (a head with a flag behind). You will then be taken to the bonus slot machine mini-game. Get three of the heads that have a "?" on them to unlock a character. The following characters can be unlocked by defeating them in Story mode, then playing the slot machine until they are won:
- Buu
- Cell
- Frieza
- Gaara
- Majin Buu
- Nami
- Rock Lee
- Trunks
- Ussop
- Cell
Successfully complete the game with any character.
Successfully complete Single Player mode on the Normal difficulty setting to unlock the Hard difficulty setting.
Successfully complete Single Player mode on the Hard difficulty setting to unlock the Very Hard difficulty setting.
Successfully complete Single Player mode on the Very Hard difficulty setting to unlock Time Attack mode.