Dedenne Is Pichu, Pichu Is Dedenne...!?

As our heroes continue their journey to the Shoyo City Gym, they stop at a Pokémon Center, where Nurse Joi declares all their Pokémon are in perfect health. A Trainer named Rena and her young sister Rimu are there as well. When our heroes prepare to leave, Eureka accidentally grabs the wrong bag, but doesn't realize it until later, when she looks inside. Dedenne is gone, and in its place? A Pichu. Realizing Eureka grabbed the wrong bag, our heroes go back to the Pokémon Center and Nurse Joi recalls the "little girl with the red ribbon in her hair", so off they go in search of Eureka's bag. Meanwhile, Rima and Rena are having a good time exploring the town, and it is obvious Rimu has a great love of Pokémon. But when she looks in her bag, out pops Dedenne. Our heroes are frantically looking for the girl with the red ribbon in her hair, asking everyone they meet if they've seen her--until someone remembers the little girl in the park. At the park, our heroes discover Rimu is not there, and Eureka is worried they won't ever find Dedenne. Not about to give up, our heroes continue their search. Citron's new invention, his "Electric Wavelength Amplifier", sends out a blast of Pikachu's electrical energy through the air, which Dedenne senses immediately. It takes off at full speed, followed by a perplexed Rimu. Our heroes meet Rena, but she is unsure of Rimu and Dedenne's whereabouts. But Dedenne is following the Electric Wavelength Amplifier's signal, and Rimu is doing all she can do to keep up. When they enter the forest, a Spear threatens Rimu and Dedenne, but Dedenne powerfully battles back. Suddenly, when a swarm of Spear approach, an unexpected Thunderbolt from Pikachu stops them cold. Our heroes have finally found the frightened Rimu and Dedenne. After Dedenne and Pichu are reunited with Eureka and Rimu it becomes obvious that both little girls have been feeding their Pokémon an abundance of snacks, as Pichu and Dedenne are much too full to eat lunch.