Puyo Puyo 4 cheats and cheat codes for Dreamcast

Unlock Dopey:
Finish the Quest mode after pause the game at the ranking screen.
Hold L next to Satan and unlock Dopey!

Unlock Dopple Aruru:
Finish the game in story mode.
Hold L and push Y at either Free Play or VS Mode.

Unlock Carbuncle:
Finish the game in story mode.
Hold R and push Y at either Free Play or VS Mode.

Secret wallpaper:
If you insert your game disc into a PC CD-ROM drive, you will find
an image file named Omake.