The official Pokémon movie website has updated. Translations follow:

The episode of the TV anime series "Pocket Monsters XY&Z" that will be broadcast Thursday June 16th will be an ingenuity festival! This week, "Heatbursts at the Ingenuity Festival!" will air!

To commemorate that there's only one month left until "Pokemon the movie XY&Z: Volcanion and the Ingenious Magearna" premieres, the episode of the TV anime series "Pocket Monsters XY&Z" that will be broadcast Thursday June 16th will be an ingenuity festival! This week, "Heatbursts at the Ingenuity Festival!" will air!

Story:
Satoshi and his friends have dropped by the "Ingenuity Festival", which features the best creations of the masters of ingenious devices from all over Kalos!
They immediately decide to participate in the festival, with an eager Citron leading the way, but when the contraptions in the building activate, they end up getting separated from Pikachu and the other Pokemon...
Tons and tons of strange, weird and intriguing ingenuities will appear here! If you watch this anime episode, you might come to enjoy the movie even more!!



This is an Ingenuity Special where Citron is going to play an major role! He may not be very athletic, but he's able to really move it thanks to his ingenuity!?
And while we're on the topic of ingenuity, that word definitely brings Magearna, the star of this year's movie, to mind! So we're going to bring you special info on the movie this episode, too!
This is an ingenuity festival taking place shortly before the movie that will make you enjoy it even more!

The episode airs on the TV Tokyo Network Thursday June 16th at 6:55pm! Don't miss it!!

For further information, see the TV Tokyo ani-tv page

Source: http://www.pokemon-movie.jp/news/?p=2092