Play as Maestro:
Beat Time Attack mode 300 times to face Maestro. Defeat him to unlock him.
Play as Zeon and Deufo:
Beat Zatch story mode to unlock Zeon and Deufo.
Defeat the first ten opponents in Zatch Bell's story line to unlock the password option in the Bonus section.
Play as Laila and Albert:
Enter UCKAHEIT as a password.
Play as Milordo-Z and Koko:
Buy all Spell cards in bonus mode.
Play as Wonrei and Li-En:
Defeat Wonrei and Li-En in multi-player mode.
Buy the following cards to unlock the corresponding characters/stages:
|Red Card number 66||Zofis and Coco|
|Green Card number 318||Alternate Reira and Arubeiru|
|Red Card number 37||Castle stage|
|Red Card number 35||China Temple stage|
|Yellow Card number 138||Dr. Nazonazo's stage|
|Red Card number 36||Egyptian stage|
|Red Card number 72||Forest stage|
|Red Card number 38||Moon Tower Stage|
|Yellow Card number 172||River Side Stage|
|Red Card number 59||London stage|
Thanks to Revolution reader japanimator!