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 fabled Rusted Sword and Rusted Shield.

Hop and the rest of the team chase after a Legendary bird Pokémon while Henry and Casey keep training the Pokémon Kubfu!