Unlock Ayame's Shuriken mini game:
Get 500 or more medals in a mini-game.
UnlockGunrock's Slot mini game:
Get 1,000 or more medals in a mini-game.
Bonus weapons:
Finish the following task to unlock the indicated bonus weapon.
Note: Pete, Gourmand, Julia and Accel do not unlock items
in the first Power Stone.
Bonus weapon - Task:
Wok Gun: Finish either game with Gourmand
Twin Potion: Finish either game with Wang-Tang
Turbo Helmet: Finish either game with Pete
Totem Hammer: Finish either game with Galuda
Thunderbolt Rider: Finish either game with Accel
Stone Sweeper: Finish either game with Julia
Soccer Ball: Finish either game with Falcon
Maches Chainsaw: Finish either game with Jack
Giant Boots: Finish either game with Gunrock
Decoy Bomb: Finish either game with Ayame
Crystal Ball: Finish either game with Rouge
Amenomurakuno: Finish either game with Ryoma
Power Stone: Bonus weapons:
Finish the game to unlock the following weapons:
Power Shield, Machine Gun, Nyoi-Bo, and Ray Gun.
Power Stone: Unlock Pete as playable character:
Finish the game.
Power Stone: Unlock Julia as playable character:
Finish the game as Pete.
Power Stone: Unlock Gourmond as playable character:
Finish the game as Julia.
Power Stone: Unlock Accel as playable character:
Finish the game as Gourmond.
Power Stone: Unlock Final Form Valgas as playable character:
Finish the game as Valgas.
Power Stone: Unlock Kraken as playable character:
Finish the game with all characters except those from the Ps2 version.
Power Stone: Unlock Valgas as playable character:
Finish the game with Kraken.
Power Stone 2: Unlock Pride and Kraken as playable character:
Finish 1-on-3 mode as Falcon.
Power Stone 2: Unlock Valgas as playable character:
Finish 1-on-3 mode as Kraken.
Power Stone 2: Unlock Mel as playable character:
Finish 1-on-3 mode as Pride.
