Puyo Puyo!! 20th Anniversary (Wii)
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All characters, gallery videos, and 9999 shop points
Hold Minus and press Up, Down, Right, Left, 1, 2 at the title screen. Carbuncle will say something to confirm correct code entry.
Repeatedly purchase the item in the fourth tab of the shop until you unlock one of the following modes: Non-Stop Fever, Excavation, Giant Puyo, Ice block, and Spinner. Note: You must unlock all five individually.