Buy Green Card No. 318 "Saigo No Kissu (Last Kiss)" in Bonus mode. At the character selection screen, highlight Reira/Arubeiru and press R1.
Castle stage
Buy Red Card No. 37 "Vamoon" in Bonus mode to unlock the Castle stage.
China Temple stage
Buy Red Card No. 35 "Tsuaoron" in Bonus mode to unlock the China Temple stage.
Dr. Nazonazo's stage
Buy Yellow Card No. 138 "Mikoruo Ma Zegaruga" in Bonus mode to unlock the Dr. Nazonazo's stage.
Egyptian stage
Buy Red Card No. 36 "Belgim E O" in Bonus mode to unlock the Egyptian stage.
Forest stage
Buy Red Card No. 72 "Umagon" in Bonus mode to unlock the Forest stage.
London stage
Buy Red Card No. 59 "Victoreem" in Bonus mode to unlock the London stage.
Moon Tower stage
Buy Red Card No. 38 "Demoruto" in Bonus mode to unlock the Moon Tower stage.
Password option
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. Alternately, buy all Event cards in Bonus mode.
Play as Kido
Defeat Kido in any Story mode to unlock him.
Play as Koko
Buy all Spell cards in Bonus mode to unlock Koko.
Play as Laira
Collect all Event cards to unlock Laira.
Play as Li-En
Defeat Li-En in Multiplayer mode to unlock him.
Play as Maestro
Win Time Attack mode 300 times to face Maestro. Defeat him to unlock him as a selectable character.
Play as Milordo-Z
Buy all Spell cards in Bonus mode to unlock Milordo-Z.
Play as Mohawk Ace
Buy all Mamodo cards in Bonus mode to unlock Mohawk Ace.
Play as Mr. Riddles
Defeat Mr. Riddles in any Story mode to unlock him.
Play as Ponygon
Get the powered-up version of Brago and Sherry in Zeno's story. To do this, after defeating Brago and Sherry in Zeno's story, go to the park. Defeat powered up Brago/Sherry, who are encountered randomly. Then, successfully complete Zenos story to unlock powered up Brago/Sherry. Afterwards, use powered up Brago in Time Attack mode against normal opponents, and not the powered up version if you have it. On the final level you should fight Ponygon. Defeat him to unlock him. Ponygon has no spells. If you try to use one, a "?" will appear on his head.
Play as Victoream
Buy all Mamodo cards in Bonus mode to unlock Victoream.
Play as Wonrei
Defeat Wonrei in Multiplayer mode to unlock him.
Play as Zeno and Dufort
At the title screen, press Up(2), Down(2), Left, Right, Left, Right, X, A to unlock Zeno and Dufort.
Play as Zeno and Dufort in Story mode
At the title screen, press Up(2), Down(2), Right, Left, Right, A, X to unlock Zeno and Dufort in Story mode.
Play as Zeon and Deufo
Successfully complete Zatch's Story mode to unlock Zeon and Deufo as selectable characters.
Play as Zofis/Coco
Buy Red Card No. 66 "Brago VS Zofis" in Bonus mode to unlock Zofis/Coco.
Powered Duffort and Golden Zeno
Challenge them in Fairy Wood's Stage: London Part. Requires to have all fiftysix chapters unlocked in the Mamodo Book.
River Side stage
Buy Yellow Card No. 172 "Baberuga Gurabidon" in Bonus mode to unlock the River Side stage.