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.
Free-roaming Super Mario gameplay makes a return in this brand-new adventure. Bowser has become gargantuan and lost all control! Explore Lake Lapcat and its islands, complete objectives to collect Cat Shines, and team up with Bowser Jr. to bring his big, bad dad back to normal. Just watch out for Bowser’s island-wide attacks.