At the title screen, press Up(2), Down(2), Left, Right, Left, Right, Circle, X to unlock Zeno.

At the title screen, press Up(2), Down(2), Right, Left, Right, X, Circle to unlock Zeno in Story mode.

Defeat the first ten opponents in Zatch Bell's story line to unlock the "Password" option under the Bonus section. Enter one of the following passwords to active the corresponding cheat function:

Play as Laila and Albert

Enter "UCKAHEIT" as a password to unlock Laila and Albert.

Obtain Red Card No. 37 "Vamoon" to unlock the Castle stage.

Obtain Red Card No. 35 "Tsuaoron" to unlock the China Temple stage.

Obtain Yellow Card No. 138 "Mikoruo Ma Zegaruga" to unlock the Dr. Nazonazo's stage.

Obtain Red Card No. 36 "Belgim E O" to unlock the Egyptian stage.

Obtain Red Card No. 72 "Umagon" to unlock the Forest stage.

Obtain Red Card No. 59 "Victoreem" to unlock the London stage.

Obtain Red Card No. 38 "Demoruto" to unlock the Moon Tower stage.

Obtain Yellow Card No. 172 "Baberuga Gurabidon" to unlock the River Side stage.

Obtain Green Card No. 318 "Saigo No Kissu (Last Kiss)". At the character selection screen, highlight Reira/Arubeiru and press R1.

Defeat Kido in any Story mode to unlock him.

Collect all Event cards to unlock Laira.

Defeat Li-En in Multiplayer mode to unlock him.

Win Time Attack mode 300 times to face Maestro. Defeat him to unlock him as a selectable character.

Collect all Spell cards to unlock Milordo-Z.

Defeat Mr. Riddles in any Story mode to unlock him.

Collect all Mamodo cards to unlock Victoream.

Defeat Wonrei in Multiplayer mode to unlock him.

Successfully complete Zatch's Story mode to unlock Zeon and Deufo as selectable characters.

Obtain Red Card No. 66 "Brago VS Zofis" to unlock Zofis/Coco.