Episode 214: Naruto and Menma are sent on a mission with Neji and Tenten. Tsunade begins suspecting that Menma was a Sound ninja due to his abilities, and Neji begins suspecting the same thing when Menma moves even faster than he does. The group enters a town that was largely destroyed by bandits, and Menma convinces Naruto’s group to help build it to defend against another attack.
Episode 215: When Menma is injured by one of the bandits, it is revealed that he was once one of them, and that he was at the town during the attack. Despite this, Menma is willing to risk himself to help fight off the bandits, and tells Naruto of the leader’s master plan to flood the town with a dam. After revealing that he never lost his memory, Menma sacrifices his life to cause a rockslide to save the town. Naruto defeats the bandit leader and mourns Menma’s loss.