Seems kinda like a Pokémon Snap social feature.
☆ NintendObs Weekly – Monday, September 5, 2016 – Sunday, September 11, 2016.
Find Pokémon all over the place with the Poké Finder feature.
A feature known as the Poké Finder allows you to take pictures of Pokémon you find. It’s loaded into the Rotom Dex. When you use the Poké Finder in certain photo spots scattered throughout the Alola region, you can take pictures of Pokémon.
The pictures you take will be evaluated, and as you take better pictures, more features—like the ability to zoom in—become available.
Source: Pokémon Sun Moon.
Ici en français : Trouvez des Pokémon dans tous les coins avec le Poké Scope ! 😉
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And if you’ve already got yours, click on Pokémon Sun & Moon for everything you need to know about the games. 😀