The Pokémon Sun and Moon Special Demo Version has been keeping plenty of 3DS owners busy since its arrival, with a mini adventure of its own and plenty of items and an Ash-Greninja to claim; these will be transferrable to the full game.
One thing the demo is doing to keep players coming back is giving away special items after set numbers of days - it's based on calendar days from the point you first play it. For those that picked this up when it launched on 18th October, the first extra is available.
A man by the Pokémon Centre should be waiting and will offer you 10 Pretty Wings for your trouble. More 'events' are due 5, 12, 18 and 24 days after the initial play of the demo.
It'll be interesting to see what comes next.