In Pokémon Sun and Moon, a QR Scanner function allows players to see information about Pokémon when they scan QR codes. By scanning in special patterns, players can register Pokémon of the Alola region to their Pokédex and find out where they live. If you scan in the QR code for a Pokémon that you haven’t yet caught, you can check its habitat and search it out. The QR code for Klefki is pictured above, while Mimikyu and Bruxish can be scanned in the images below.
Pokémon Blog 