A Stealthy Challenge! The heroes spot their ninja friend Sanpei and his Greninja floating down a river, unconscious. After they mount a rescue, Sanpei explains that he’s on a mission for his ninja master, Saizo, but a masked ninja and his Barbaracle partner keep trying to interfere. Ash and friends decide to help Sanpei on his mission, but soon Ash and Sanpei are separated from the others.
