One Piece: Grand Battle! Rush, known in the U.S. as One Piece: Grand Battle! and in Europe as Shonen Jump's One Piece: Grand Battle!, is a fighting game made in Japan based on the anime and manga series One Piece. It is the fourth and final game in One Piece's Grand Battle series and the nineteenth One Piece video game released.
In early Japan, a man named Shiro Tokisada Amakusa preaches a heretic religion. Little does anyone know that Amakusa is really a servant of the evil Ambrosia, who took over Amakusa's body. Ambrosia wishes to shroud the world in darkness. Now, choose between 12 warriors (and 3 bonus characters) to fight for the honor of destroying Amakusa, and fulfilling a mission.