SpotPass
From Nookipedia, the Animal Crossing wiki
SpotPass is a feature found in the Nintendo 3DS and Wii U. It is a wireless feature built into the system that allows the player to connect to a network to download content to the console, such as demos and bonus content for games.
SpotPass is used in Animal Crossing: New Leaf on the 3DS in order to download distributed items, similar to the distribution of items in Animal Crossing: City Folk on the Wii.