One Piece: Grand Battle Swan Colloseum is an online WSWAN game that you can play at Emulator Online. This free WonderSwan Color game is the United States of America region version for the USA. One Piece: Grand Battle Swan Colloseum is a single title from the many action games, fighting games and anime games offered for this console. If you enjoyed playing this, then you can find similar games in the wswan games category. One Piece: Grand Battle Swan Colloseum game is from the various retro games on the site, and there are more games like this, including Fire Emblem: The Sacred Stones, One Piece: Gigant Battle and Grand Theft Auto Advance (GTA).