Play One Piece: Grand Battle Swan Colloseum online in your browser and enjoy with Emulator Games Online! One Piece: Grand Battle Swan Colloseum is WSWAN game USA region version that you can play free on our site. This game has action, fighting, anime genres for WonderSwan Color console and is one of a series of anime games. If you love anime games you can also find other games on our site with Retro Games. Below you will find control for the emulator to play One Piece: Grand Battle Swan Colloseum.