The Legendary Pokémon Thunder appears! Satoshi and Go immediately challenge it to a battle, but Thunder proves to be way too much for them... But then, someone appears! It's the Rocket Gang! Who will get Thunder?!
It's a nice day, but as Satoshi and the others are enjoying some snowcones at the Sakuragi Laboratories, a huge thunderstorm suddenly draws close. And once they sense the presence of powerful biological energy, they realize it's possible the Legendary Pokémon Thunder might actually be nearby! And as the areas surrounding the Sakuragi Laboratories keep losing power, Go gets a sudden flash of insight. When they head to the place he thought of, they find Thunder there and immediately challenge it to a battle, but Thunder proves to be way too much for the duo. However, they decide to have a Raid Battle against it, working together with some "helpers" they truly didn't expect to be there!!