Pokemon has announced the English title of the 17th movie – Diancie and the Cocoon of Destruction – and has also released an English dubbed version of the trailer that debuted in Japan a few weeks ago. It is currently unknown when or where the English film will premiere.
Diancie is pronounced “Dee-an-see,” the diamond is called the “Heart Diamond,” and the Dialand is called the “Diamond Domain.”
In the underground Diamond Domain, where many Carbink live, the Mythical Pokémon Diancie serves as ruler. The Heart Diamond that sustains the land is beginning to fall apart, and Diancie is not yet strong enough to create a new one. While seeking help from the Legendary Pokémon Xerneas, Diancie encounters a group of thieves who want to take control of its diamond-producing power—and who awaken the Legendary Pokémon Yveltal from its cocoon in the process! Can Ash and his friends help Diancie discover its true power, stop Yveltal’s rampage, and save the Diamond Domain?