Complete either game with the indicated character to unlock the corresponding weapon. 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
Gunrock's Slot mini game
Obtain at least 1000 medals.
Unlock Accel
Beat the game with Gourmond.
Unlock Gourmond
Beat the Game with Julia.
Unlock Julia
Beat the Game with Pete.
Unlock Mel
Finish 1 on 3 mode with Pride.
Unlock Original Special Weapons
Complete the game once with any character to unlock all the original secret weapons from Power Stone one.