Casey Shield, a hacker who invented the Dynamax Simulator, and Henry Sword, a boy who repairs gear for Pokémon, both dream of entering the Galar region's Gym battles. For Casey, it's a chance to reunite with her lost Pokémon. For Henry, it's an opportunity to search for the legendary Rusted Sword and Rusted Shield. Casey and Henry's journey through the Galar region continues! Casey is finally reunited with another of her missing Pokémon! Will she be able to find all of them? And can Henry win the challenge against Allister?!