Game Guides, Cheats, Codes, Hints and Walkthroughs for Zero 4 Champ Doozy J on Playstation 1.

Always get 777 on slot machines
Pause the game while the slot machine is spinning and press Up, L1, Select.

View development staff
At the title screen, press Down + L1 + R1 + Circle.

Sound novel mode
Enter “NOVEL” as a first name and “SOUND!” as a last name.