Pokémon the Movie: Diancie and the Cocoon of Destruction

The film unfolds in Diamond Ore Country, a subterranean realm inhabited by Carbink and ruled by Princess Diancie. The country's energy source, the Sacred Diamond, is dwindling, threatening its existence. Diancie, lacking the power to create a new diamond, seeks help. She encounters Ash and Pikachu, and they embark on a journey to find the legendary Pokémon Xerneas, known for its sacred power. Their quest is fraught with danger, as they discover the cocoon of Yveltal, a Pokémon of destruction, who once ravaged the Kalos region, lying in wait. The fate of Diamond Ore Country rests on Diancie's ability to harness her power and the success of their perilous journey.