This is a pack of trading cards.
Adapted from the Nintendo site:
These trading cards have amiibo functionality with the "Animal Crossing: Happy Home Designer" game! Tap the Special Character cards to your New Nintendo 3DS to call in animals that would otherwise not appear in your game with requests, or use them to invite up to 4 characters to hang out!(Your 3DS must have an NFC Reader/Writer in order to use the amiibo cards.) Each pack contains 3 cards out of a possible 100 different cards.
Please note that these are trading cards and the pack is packed and sealed before shipment to HobbyLink Japan. As a result, we are unable to honor requests for individual or specific cards, nor can we promise you which one(s) you will receive in a pack. Please order only if you are willing to accept any of the possible types.