Nintendo Announced amiibo In-game Toys, E3 2014 Video/Screens

Nintendo characters come to life in new ways as amiibo
amiibo are interactive figures that have the ability to communicate with multiple specially designed games by just touching them to the Wii U GamePad controller. Nintendo plans to release first series of amiibo this year alongside Super Smash Bros. for Wii U. Titles like Mario Kart 8, Mario Party 10, Captain Toad: Treasure Tracker and Yoshi's Woolly World are also planned to support amiibo.
In Super Smash Bros., players can battle alongside or against their amiibo characters, leveling them up in the process. They can then bring them to a friend who has a Wii U and the game to show off how they've trained and customized their characters. A video and five screenshots are available for your viewing pleasure.
Update: Nintendo also announced that a new NFC reader/writer being designed for Nintendo 3DS is scheduled to launch in 2015.