The Pokémon found in the Galar Mine wasn't a black Rayquaza, but a Galarian Moltres, a symbol of the Six Heroes Pokémon that traveled with Lucius, holding an ancient Poké Ball! Rico and her friends desperately want to get close to Galarian Moltres, which is burning with intense rage and keeps others at bay. Winning battles isn't the only path to becoming a trainer—what kind of plan will they come up with, inspired by the words of Gym Leader Kabu!?

The Explorers, led by Amegio, have appeared to seize Terrapagos. A fierce battle is about to begin in the ancient castle! Freed and Amegio have fought countless battles together. What will be the outcome of this match? And can Rico and Roy, who have grown stronger through their many adventures, defeat Jill and Conia? Furthermore, the Explorers Hambell, Sango, and Onyx also join the fray—!?