The Core Awakens

Pagogo turns into its Stellar Forme and sends its power to the 18 Pokémon, which Terastallize one after another. Meanwhile, the Explorers go all out to prevent the Rakulium from getting eradicated! Liko and the others find themselves driven up against the wall, but still fight on, refusing to give up. And then Spinel takes a "certain action" that awakens the Rakulium Core itself...?!