Power Stone Collection Codes -

Bonus weapons:
Complete either game with the indicated character to unlock the corresponding weapon. Note: Pete, Gourmand, Julia and Accel do not unlock items in the first Power Stone.

Amenomurakuno: Ryoma 
Crystal Ball: Rouge 
Decoy Bomb: Ayame 
Giant Boots: Gunrock 
Maches Chainsaw: Jack 
Soccer Ball: Falcon 
Stone Sweeper: Julia 
Thunderbolt Rider: Accel 
Totem Hammer: Galuda 
Turbo Helmet: Pete 
Twin Potion: Wang-Tang 
Wok Gun: Gourmand 

Ayame's Shuriken mini game:
Get 500 or more medals in a mini-game.

Gunrock's Slot mini game:
Get 1,000 or more medals in a mini-game.

Power Stone: Play as Pete
Successfully complete the game.

Power Stone: Play as Julia
Successfully complete the game as Pete.

Power Stone: Play as Gourmond
Successfully complete the game as Julia.

Power Stone: Play as Accel
Successfully complete the game as Gourmond.

Power Stone: Play as Final Form Valgas
Complete the game as Valgas.

Power Stone: Play as Kraken
Complete the game with all characters except those from the PlayStation2 version.

Power Stone: Play as Valgas
Complete the game with Kraken.

Power Stone: Bonus weapons
Successfully complete the game to unlock the following weapons: Machine Gun, Nyoi-Bo, Power Shield, and Ray Gun.

Power Stone 2: Play as Pride and Kraken
Complete 1-on-3 mode as Falcon.

Power Stone 2: Play as Valgas
Complete 1-on-3 mode as Kraken.

Power Stone 2: Play as Mel
Complete 1-on-3 mode as Pride.