Puyo Puyo! 15th Anniversary

To unlock all hidden characters, rulesets, and other settings, enter the following code at the title screen in the specified order. If entered correctly, there will be a chime heard and the game will go to the main menu.

Code - Effect

While holding L+R, press up, down, right, left, triangle, X, square, O - Unlocks all characters and all rulesets.