Kaiden and Hogeta are constantly fighting. Roy is troubled by the two who can't seem to get along, so he comes up with an idea to deepen their bond by having them team up and battle Captain Pikachu. However, even in battle, the two can't work together and end up fighting again... Meanwhile, turbulence appears in front of the airship Brave Asagi as it flies through the sky...!?

The group arrives in the Galar region. Leaving their conspicuous airship behind, they decide to travel by land to the old castle where Riko's grandmother, Diana, resides. However, due to train service being suspended, they spend their free time in Engine City. Riko and Roy, along with Murdoch, head to the Battle Cafe, where they encounter Mitchell, a former pastry chef colleague of Murdoch's. But it seems the two have some kind of history…!?