After learning the story of the Ancient Adventurer, Liko is faced with a decision.

Inside Galar Mine, Liko and the others find a Pokémon that doesn't seem happy to see them!

Liko's grandmother Diana has decided to disembark from the Brave Asagi, and Liko and Roy start working with their companions and Pokémon in secret on a farewell party for her! Meanwhile, the battle against the Black Rayquaza has made Amethio fully realize his own inadequacies. Aiming high, he approaches Hamber with a certain request, but...

The Rising Volt Tacklers are visiting a beach in the Paldea region. Liko and Roy are having a great time playing with the local sea Pokémon, but trouble suddenly arises when Hogator gets washed out to sea! The day ends up getting saved by Irukaman, the Hero of the Sea! Roy is amazed at how cool Irukaman is... but just then, someone is lurking nearby, planning to catch Irukaman's supposedly never-before-seen transformation scene on camera...?