One Piece: Grand Adventure is a video game developed by Ganbarion and published by Namco Bandai Games for the Gamecube, released in 2006. It is based on the popular manga and anime series One Piece. The game is an action-adventure with fighting elements, capturing the style and characters of the series as players battle through various stages and complete character-specific episodes. Players can choose from a wide roster of characters each with unique moves and abilities, engaging in both single-player and multiplayer modes.