Nintendo release on October 18, 2016 in the Japan eShop the official DEMO version of the Pokemon Sun/Moon for Nintendo 3DS.
The DEMO will be available for FREE for everyone and in the DEMO you can have an adventure together with the key character of the TV animation, Ash.

The size of the demo will be 400 MB (3100 blocks) but it is not clear if there will be any play time (start) limitations.
In the gallery you can find the QR code already what you have to scan with the 3DS and than on 18th you can download the DEMO.