Pokémon: Diancie—Princess of the Diamond Domain

The story is set in Diamond Ore Country, of which Diancie is the princess.This is a country located deep underground, where the Pokémon Carbink live together in peace. The energy source of this country is a giant diamond called the Sacred Diamond, which can only be created by princess Diancie. However, the current princess doesn't yet possess the power to create such a diamond, and the current Sacred Diamond's power is soon going to run out, which would result in the end of the country. Diancie meets up with Ash and Pikachu, and set off together with them to search for the legendary Pokemon Xerneas, which possesses sacred power, but on the way, they find the cocoon where the Destruction Pokémon, Yveltal, who was said to have once destroyed life in Kalos, lies in wait.

A short which ran along side the Pokemon XY: Hakai no Mayu to Diancie movie.

When they exit the door of light, there lies a sparkling and glittering mysterious world. And there, they meet a lone young girl. What will happen to the Precures in this world enveloped by cherry blossom trees in full bloom!? This spring, it's not an All Stars, but a completely new story that is beginning.

Many millennia ago, a meteor from space which threatened to destroy the world was stopped by Arceus who intervened to protect the world. While attempting to protect the world, Arceus was badly injured and Damos (ダモス) took care of it. As gratidude, Arceus promised to help make the desolate land of Michīna rich and prosperous so it gave Damos the Jewel of Life (命の宝玉). Arceus let Damos borrow 16 parts of its body to create the Jewel of Life which were to be returned to it on a specific date. Arceus was betrayed when it was not returned and it vowed to judge humans when it awakens. Many millennia after these events, Satoshi, Hikari and Takeshi arrive in the riverside town of Michīna (ミチーナ) which is surrounded by nature's beauty. They decide to go the ruins of Michīna which are at the summit of a large rock. There is a large and beautiful lake at its shores and Satoshi and friends are fascinated by the lake, but suddenly, waves begin to form in the lake and tornado of water begins to wreak havoc. A descendant of Damos, a girl called Sheena, runs out from the ruins of Michīna. Sheena saw what was happening and she summoned Dialga and she says "Dialga, please!" and Dialga manages to stop the tornado. Satoshi and his friends finally get to see the ruins and Kevin and Sheena tell the old legend of Michīna to Satoshi and his friends. Moments after they explain the legend, the fighting between Dialga, Palkia and Giratina becomes fierce and the ruins of Michīna are destroyed. Arceus is awoken...