Play One Piece - Gear Spirit (J) Online

One Piece: Gear Spirit (J) came out for the Nintendo DS in 2007, developed and published by Bandai Namco Entertainment. It was part of that wave of mid-2000s anime adaptations that tried to capture the feel of the source material without leaning too hard on the hardware's limitations. The DS had a lot of experimental titles back then, and this one fit right in with its touchscreen-focused approach to brawling.

You control Monkey D. Luffy and other members of the Straw Hat crew, moving through side-scrolling stages and engaging in three-on-three battles against other pirate crews. The main goal is to fight your way through various story arcs, defeating bosses and unlocking new characters along the way. Signature mechanics include using the touch screen to stretch Luffy's arms for long-range attacks and tapping icons to perform special moves with different crew members. The pacing is fast, with fights that can get chaotic when multiple characters are throwing punches and slashing swords at the same time. It feels responsive when your swipes connect, though the screen can get crowded during bigger skirmishes.