Bandai Namco is developing a 2D action game titled One Piece Dai Kaizoku Colosseum for the Nintendo 3DS.
Weekly Shonen Jump will release more information later. The Game does not have a scheduled date yet. What is known is that the game will have a mode where players can create their own crew of pirates and explore the world.
In battle, special moves are enacted by pressing buttons with the right rhythm. As the player defeats rivals, the reward increases on their wanted poster.
Source: ANN