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.
Catch, battle, and train Pokémon in the Paldea Region, a vast land filled with lakes, towering peaks, wastelands, small towns, and sprawling cities. Explore a wide-open world at your own pace and traverse land, water, and air by riding on a form-shifting Legendary Pokémon—Koraidon in Pokémon Scarlet and Miraidon in Pokémon Violet. Choose either Sprigatito, Fuecoco, or Quaxly, to be your first partner Pokémon before setting off on your journey through Paldea.