Animal Crossing: New Leaf - Welcome amiibo

Animal Crossing: New Leaf Welcome amiibo is an update to, first announced in year years after the release of the game in 2016. The update is be available digitally from the Nintendo eShop, and as part of a physical bundle with new Animal Crossing amiibo that releases on November 25, 2016.

Announcements
Nintendo first revealed the free update in a Nintendo Direct on January 9, 2016.

On November 2, Nintendo released an official trailer and revealed more information in another Nintendo Direct.

amiibo and new villagers
Welcome amiibo introduces amiibo compatibility to the game. Players can summon Wisp, who will prompt them to to scan a character's amiibo to make him to transform into them. Villagers who are summoned can be invited to move into town, and scanning special characters induces as-yet-unknown functionality. 50 villagers from and  who are absent in later entries return to the series with this update. They live in mobile homes found in a new RV park location, the Campground, managed by a new special character, Harvey. Scanning their amiibo will cause them to set up camp in the park, from where they can be invited to move into the town. Players can also buy furniture items from the RVs, using a new currency known as MEOW Coupons

Other amiibo series are compatible, and scanning them introduces exclusive characters and items. For example, Splatoon amiibo will bring squirrel villagers based on Callie and Marie into the game, as well a series of Splatoon-themed furniture and clothing items.

amiibo camera
Players will be able place villagers into photographs they take with their console's camera. The update also includes new items, many of which were introduced in. The player can also connect with their Happy Home Designer data if they own the game, which unlocks more new giant furniture.

Minigames
The update includes two new minigames, Animal Crossing Puzzle League and Desert Island Escape. These can be played by activating a Nintendo 3DS XL/New Nintendo 3DS XL or a Wii U piece of furniture, respectively.