Ash really wants to have a rematch against Tapu Koko, but he’s not sure about his strategy. Sophocles, who studies Electric-type Pokémon, offers to help! After some research and training at Sophocles Lab, Ash and Pikachu are ready for battle, and so is Tapu Koko.
The speed training pays off as Pikachu zooms around the battlefield and even lands a couple of impressive hits! But the Island Guardian is still too powerful...for now. As it departs, Ash promises to keep training as hard as he can, and both he and Tapu Koko seem to be looking forward to their next rematch!