The official Pokémon movie website has updated. Translations follow:

Its First Landing in Kansai! The Nyarth Balloon, and Pikachu, Are Coming to Hyogo!!

To commemorate "Pocket Monsters the Movie: I Choose You!" being such a blockbuster,
the Nyarth balloon will make its first Kansai appearance Sunday August 13th and Monday August 14th,
in Hyogo (at the Nesta Resort Kobe)!

There are plans to have "Nyarth balloon" balloon rides both days!
There will also be quiz competitions with appearances by Pikachu these days.

Times and dates:
Sunday August 13th to Monday August 14th, 2017
At 3pm: Quiz competitions with Pikachu + Nyarth balloon rides
At 5pm: Quiz competitions with Pikachu + Nyarth balloon rides
*Tickets are required for the balloon rides.
*The initial batch of tickets will be distributed to the winners of the quiz competition and others that got the answers right.

Location:
Event Square, club room besides parking lot, Nesta Resort Kobe

Participation fee:
Free

Notes:
*The balloon ride will be closed to new guests once ticket stock is exhausted.
(You'll be able to take photos of the Nyarth balloon from the ground even if you don't have a ticket)
*The balloon has a weight limit, so you may not be able to ride together with your companions.
*Content and time of event are subject to change without notice.
*The event may be canceled due to strong wind, rain or stormy weather.
*Children under the age of 12 will need to be accompanied by a guardian on the balloon.

Facility website:
http://www.nesta.co.jp

Source: http://www.pokemon-movie.jp/news/?p=3105