Cheat Moves
There are two special moves that will allow you to perform a super attack that cannot be stopped. During the stage selection screen, hold down the "Z" button and the "Plus" button. A chime will sound to indicate you are ready to enter a cheat code.
To set the "Tail Power Swing," press Up, Down, Left, Right on the directional pad. A chime will sound if the cheat is entered correctly.
To enable "Double Fist Power," press the thumb stick to the right on the Wii nunchuck and then press the d-pad on the remote to the left. Press left on the nunchuck and then right on the remote. Finally, press the trigger buttons the nunchuck and the regular remote at the same time.
Double Experience Points
Gaining double experience in battle will make more difficult fights easier towards the end the game. Start up Ultimate Battle Z mode and select a Tag Team. During the character selection, make sure you choose the character you want to gain experience with. When setting the fight properties, select "Sustom" and allow the equipment of "Z items." After you set the options for character 1, pick the exact same character as your tag team partner. Set the same custom options again for character 2. Start the battle. Once you win, you now get double the experience since you are using the same character twice in the fight.
Unlock Wii-Exclusive Characters
There are multiple characters that you can unlock in the game. To unlock these characters, you are going to have to invest a little time and complete a number of levels.
By completing course 2, you will unlock the Frieza soldier. Course 4 will unlock Appule. Complete courses 6 and 8 to unlock Cyborg Tao and Demon King Piccolo, respectively. To get the special Pilaf Machines, complete course 10.
Invincibility
During the very challenging fight with Majin Buu, you can turn invincible by performing a move repeatedly. During the fight, use the "Mystic Combo" to knock your opponent into a hole. Hold down the charge button until the meter is full. Speed towards the hole after you charge and immediately perform the Mystic Combo again. You will hit Majin Buu before he has a chance to attack and knock him into another hole. Repeat this action and you will never get hit, thus being invincible and easily winning the fight.
Secret Storylines
The game also has secret storylines. The key to identify the battles from which the secrets can be unlocked is to look for fights that have the question mark (??????) in the objective line.
To get the "Fateful Brothers" cheat, beat Radditz with Piccolo. Do not use any other character, or this cheat does not work.
To launch the "Beautiful Treachery" story, you must beat Dodoria with Krillen and Kid Gohan during the Frieza Saga.
To open the final secret storyline "Defeated Rivals," you must win against Gohan while playing as Goten in the Majin Buu Saga.