The game comes directly from Nintendo eShop, you will be able to go online, get updates etc.
After setup process the game will be available to launch on your own account, just as any other game or app you purchased directly in Nintendo eShop.
Travel to the islands that make up the Lental region. In this region, some of the Pokémon and vegetation will appear to have a special glow. Research these Pokémon alongside Professor Mirror as you explore dense jungles, vast deserts, and more! Your observations of Pokémon thriving in the wild may help unravel the truth behind the Illumina phenomenon. The Pokémon pictures you take will be used to build your very own Pokémon Photodex!