Liko, a girl from Paldea, arrives at Indigo Academy and meets her partner Pokémon, Sprigatito.

Friede, Captain Pikachu, and the Rising Volt Tacklers step up to help protect Liko from a suspicious group.

As Liko begins settling in on the Brave Olivine, the Fuecoco who lives on the ship goes missing!

Wanting to see Fuecoco, Roy sneaks aboard the Brave Olivine—but the Rising Volt Tacklers confront him! They let him stay, but he and Liko aren’t able to find Fuecoco. The next day, the airship must once again land for repairs, so Roy suggests asking his gramps for help. Meanwhile, Fuecoco rushes onto the island in search of Roy, but then it sees the Explorers closing in! It finds Roy, and everyone returns to the Brave Olivine to battle the Explorers as the island’s wild Pokémon make repairs. When it’s Roy and Fuecoco’s turn to fight, Fuecoco struggles to attack—can Roy figure out a way to cheer it on?

Amethio almost grabs Liko, but her pendant again surrounds her with a barrier—and strangely, Roy’s Ancient Poké Ball glows in sync. The three begin to battle, but Amethio has the upper hand, so Liko pleads for help. Suddenly, the pendant and Ancient Poké Ball light up, and a black Rayquaza emerges from the Ancient Poké Ball. It causes the Explorers to flee and then flies away. Later, Roy’s grandfather explains that the Pokémon is mentioned in a legend involving an Ancient Adventurer, and Roy decides to officially become a Pokémon Trainer with Fuecoco. But when it’s time for the Rising Volt Tacklers to leave, will he join them?