The official Pokémon movie website has updated. Translations follow:

We Will Hold Stage Greetings! To Celebrate the Movie Becoming a Major Hit! With an Outbreak of Pikachu! And Shokotan!



To celebrate that the double feature "Pokémon the Movie XY: The Archdjinni of Rings - Hoopa/Pikachu and the Pokémon Musicians" became such a major hit, we will hold screenings with stage greetings!

The screenings will be held at "Aeon Cinema Minato Mirai" in the Yokohama Minato Mirai district, where the "Dancing? Pikachu Outbreak-Chu" is currently taking place! As a special service, there will also be a Pikachu outbreak at the theater!? Guest voice actor Shoko Nakagawa will also be there, so this will definitely be a fun stage greeting!

Enjoy a Pikachu-filled stage greeting in Yokohama, where you can currently meet lots of Pikachu!

Date and time:
Saturday August 15th right after the 8:30am screening and right before the 11:20am screening.
*The screenings use a seat reservation system, audience must leave the theater after the screening.
*You will be denied admission into the auditorium if all seats are sold out.

Speakers:
Shoko Nakagawa, Pikachu (lots)
*Please note that the guests' schedules are subject to change.

Location:
Aeon Cinema Minato Mirai, Theater 8
Yokohama World Porters 5F, 2-2-1 Shinko, Naka, Yokohama, Kanagawa

Online ticket sales start at Wednesday August 12th at 9pm!
Box office ticket sales start at Thursday August 13th!

For further information on how to purchase tickets etc, please see the Minato Mirai Aeon Cinema WEB site

Source: http://www.pokemon-movie.jp/news/?p=1917