As our heroes continue their tour of the Decolore Islands, their next stop is Torom Island, where they meet up with none other than Professor Oak! He’s come to catch a Rotom as part of a research paper he’s writing about the unusual Pokémon’s various form changes, triggered by entering certain kinds of electric devices. As he’s telling Ash, Iris, and Cilan all about Rotom and what it can do, the lights flicker and then go out. Nurse Joy explains that the Rotom are drawn to the tasty electricity from the island’s power grid, so lunchtime blackouts are a common occurrence.
To combat this nuisance, the locals have created an electricity playground for the Rotom, with lots of devices for them to explore! It seems a likely spot to catch a Rotom, so our heroes and Professor Oak head there at once. They spot three Rotom traveling down the power lines, and Pikachu uses Thunderbolt to lure them in closer. The three seem to enjoy the taste of Pikachu’s electricity, but when Cilan’s Stunfisk tries to join in, they react with disgust. Emolga’s electricity is a big hit, though—at least until the three Rotom are distracted by a surge of electricity from somewhere else.
It’s Team Rocket! They’ve diverted the electricity from the power plant and are using it to lure the Rotom, and they even manage to catch one. But our heroes have a plan to combat this electric menace: they all have Ground-type Pokémon, which aren’t affected by electricity. With the help of Krookodile, Excadrill, and Stunfisk, they send Team Rocket blasting off again and free the trapped Rotom!
Professor Oak notices that Rotom is throwing sparks and seems to be injured, so he applies some medicine. This makes Rotom very happy, and when the professor asks if it would be willing to come with him and help with his research, it hops right into his Poké Ball! Mission accomplished!