Puyo Puyo!! 20th Anniversary Cheats - Nintendo DS

Cheat Mode
Choose Random Mode - Press [X] while in a mode select menu.
Harder CPU in Battles - Hold [Select] while selecting the CPU character (in Endless modes, hold [Select] while selecting your character).
Instant Win - Press [L] + [R] + [X] + [B] + [Y] + [A] during a match. Note that you will only earn 1 point at the end of the match when you use this cheat (as if you lost).
Set Player as CPU - Hold Select while selecting the difficulty during the start of the match.
Show Nuisance Multiplier - Press [Select] during a match.
Use Classic Voice Pattern - Hold [Select] while selecting a mode. This only works for Arle, Schezo, Rulue, Satan, Carbuncle, Suketoudara, Witch, and Draco for Puyo Puyo, Puyo Puyo.
Use Dropsets in Endless Modes - Hold [Select] while selecting your character.
All characters, cutscenes, 9,999 Shop Points - At the title screen hold [L]+[R] and then press [Up], [Down], [Right], [Left], [X], [B], [Y], [A].

Unlock Hidden Modes
There are five gameplay modes that are hidden which includes: Non-Stop Fever, Excavation, Giant Puyo, Ice block, and spinner. To unlock these modes keep purchasing the item in the fourth tab of the shop until you unlock one of these modes. You must unlock all five individually this way.