Here are some cheats and tips for the game Puyo Puyo 4.
Play as Dopple Aruru:
Successfully complete the game in story mode. Pass the ranking screen after
the credits and select free play or versus mode. Hold L and press Y, then
move to the left of Satan or to the right of Scheze at the character
selection screen.
Play as Carbuncle:
Successfully complete the game in story mode. Pass the ranking screen after
the credits and select free play or versus mode. Hold R and press Y, then
move to the left of Satan or to the right of Scheze at the character
selection screen.
Hidden artwork:
Place the game disc in a PC compatible CD-ROM drive to find an “omake” file
that contains a hidden image.