MS017: Pokémon The Movie - Diancie and the Cocoon of Destruction

The Cocoon of Destruction & Diancie (破壊の繭とディアンシー) is the first Pokémon X and Y series and seventeenth Pokémon movie. It will be released in Japanese theaters on July 19, 2014.

Plot
It involves a Great Destruction that once wreaked havoc in the Kalos region, making life become extinction, a barren wasteland. The Destruction Pokémon, Yveltal is said to have been the cause of this horrific event. Once Yveltal destroyed all life in the region, it turned into a Cocoon of Destruction, in which he still lies in a dormant sleep. Opposing Yveltal was Xerneas, the Life Pokémon. Only to had the power needed to restore balance against Yveltal's destructive nature and restored life to both humans and Pokémon of Kalos.

Trivia

 * It was revealed by CoroCoro that Diancie is set to appear in the film and is named, Cocoon of Destruction & Diancie.