The official Pokémon movie website has updated. Translations of the new entry follows:

The Mythical Pokémon Hoopa (Hoopa Confined) is Currently Appearing on the Nintendo 3DS "PokéToru"!

A time limited event where the mythical Pokémon Hoopa (Hoopa Confined) appears is currently running on the Nintendo 3DS Download Game "PokéToru"!

This is your chance to befriend Hoopa (Hoopa Confined)!
The event runs until Tuesday July 26th at 3pm! Make sure to try it out!

The Nintendo 3DS Download Game "PokéToru" can be played casually at a basic level for free!
*There are also purchasable items

For information on how to download the game, etc, check the official "PokéToru" website!

For more information on the Hoopa (Hoopa Confined) event, go here!

An event where Hoopa (Hoopa Confined) appears has also appeared on "PokéToru Smartphone ver."!
For more information, go here!

Sources: http://www.pokemon-movie.jp/news/?p=2221