A Stealthy Challenge!.Sanpei's ninja master Saizo sends Sanpei on a mission to deliver a secret scroll to some fellow ninjas before sundown. The scroll is actually blank, and the mission is intended as a test to prove how much Sanpei has improved his ninja abilities. As part of the test, Saizo disguises himself as a masked ninja who pursues Sanpei and the scroll with a Barbaracle. Ash and Froakie assist in battle against Saizo's Barbaracle, during which Froakie evolves into Frogadier. Ash's Froakie evolves into Frogadier.