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.
Shovel Knight: Treasure Trove is the full and complete edition of Shovel Knight, a sweeping classic action adventure game series with awesome gameplay, memorable characters, and an 8-bit retro aesthetic! Become Shovel Knight, wielder of the Shovel Blade, as he runs, jumps, and battles in a quest for his lost beloved. Take down the nefarious knights of the Order of No Quarter and their menacing leader, The Enchantress.
But that’s not everything! Shovel Knight: Treasure Trove will feature three additional campaigns that are games all unto themselves! Take control of Plague Knight, and Specter Knight on adventures of their own, with King Knight joining later as a free update! Together, they form a grand and sweeping saga!