Pokémon the Movie: Diancie and the Cocoon of Destruction (ポケモン・ザ・ムービーXY 「破壊の繭とディアンシー」, Pokemon Za Mūbī Ekkusu Wai "Hakai no Mayu to Dianshī", lit.

Directed by Kunihiko Yuyama and written by Hideki Sonoda, the film stars the voices of Rica Matsumoto, Ikue Ōtani, Mayuki Makiguchi, Yūki Kaji, Mariya Ise, Megumi Hayashibara, Shin-ichiro Miki, Inuko Inuyama, Marika Matsumoto, Reiji Nakagawa, Shoko Nakagawa, Rika Adachi, and Kōichi Yamadera.

[2] An English dub of the film was produced by DuArt Film and Video, and stars the voices of Sarah Natochenny, Haven Paschall, Michael Liscio Jr., Alyson Leigh Rosenfeld, Michele Knotz, Carter Cathcart, Caitlin Glass, Pete Zarustica, Brittney Lee Hamilton, Lianne Marie Dobbs, and Marc Thompson.

Team Rocket and the thieves Riot, Marilyn, Millis and Argus Steel fight for control of Diancie and her power to create diamonds.

[3] The February issue of CoroCoro states that the movie will revolve around the "Magnificent Battle" between Xerneas and Yveltal as well as the hidden meaning to the title, related to the Destruction Pokémon.

In addition, a prequel to the movie, titled Diancie: Princess of the Diamond Domain made its debut on the American Pokémon Trading Card Game website on November 5, 2014 with Carbink, Pangoro, and an Ariados.

Director Yuyama stated that it is the first time since Pokémon the Movie: Black—Victini and Reshiram and White—Victini and Zekrom that he and his crew traveled to a foreign country for inspiration.