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Dreamcast - Puyo Puyo 4 cheats

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.