Pokémon : S21 | E46 – The Prism Between Light and Darkness!

After Lunala recovers from UB Black's attack, it leads the Ultra Guardians through an Ultra Wormhole to rescue Solgaleo! On the other side, they discover Poipole's original home—an incredible world teeming with other Poipole, but everything is shrouded in darkness. They meet a formidable Pokémon named Naganadel, who explains that Poipole's world could be ruined without the light from Necrozma—the true identity of UB Black and The Blinding One. But Solgaleo is in danger, too! Ash has a solution: help them all! By sending their own Z-Power to Necrozma, will our heroes be able to save Solgaleo as well? (Source: Wikipedia)