Amiibo

Amiibo (Stylized as "amiibo") is the name given to figurines designed for use with the Wii U and Nintendo 3DS. Super Smash Bros. for Nintendo 3DS and Wii U has been shown to be able to use these figures.

A player of either game can place an Amiibo figurine on the bottom left side of the Wii U Gamepad, and the Amiibo will be able to fight against the player or assist them in battles. For 3DS use, the player is able to buy an add-on to use Amiibo (or simply place them on the touch screen on the New Nintendo 3DS/XL).

Mechanics
The characters spawned by Amiibos have been compared to CPUs, as they both use AI. In Super Smash Bros. for Nintendo 3DS and Wii U, players can train the figurines to be able to learn new fighting tactics. The Amiibo character will adapt to your play-style learning how to play against you. For example, if you always taunt after landing a KO, your Amiibo can learn to do the same; or if you always try to Meteor Smash opponents using risky tactics, the Amiibo will learn to do the same. In order words, the better the player, the better the Amiibo will become.

They are also programmed to detect and use items depending on your usage patterns. For example, if you always play matches without items and introduce items to them, they will be "confused" and "unaware" on how to use them.

The Amiibo will use the same moveset, and have the same stats as the character they are modeled after. However, you are able to change their stats by "feeding" them items. This will change their base stats depending on what the piece of equipment is. The maximum level an Amiibo can reach is 50.

Amiibos' interaction with a game may be either "Read/Write" or "Read Only". "Read/Write" will save certain game data directly to the Amiibo figure; however, each Amiibo can only hold data from one such game at time. If using the same Amiibo, new data from another "Read/Write" game can only be saved by deleting the data from the previous "Read/Write" game. Super Smash Bros. for Nintendo 3DS and Wii U is a "Read/Write" game. "Read Only" games scan the Amiibo to unlock additional in-game content and features, but do not save data to them. They can therefore be used repeatedly and on multiple "Read Only" games without affecting the Amiibo's saved data. Mario Kart 8 and Hyrule Warriors are "Read Only" games. Mario Party 10 has both "Read/Write" and "Read Only" capability, depending on which Amiibos are used.

Wave 1
Released on November 21, 2014.

Wave 2
Released in December, 2014.

Wave 3
Released in February 2015.

Wave 4
Released in May 29, 2015.

Wave 5
To be released July 2015.

Wave 6
To be released September 2015. Bowser Jr., Dr. Mario, and Olimar will be released in Japan on July 30.

Super Mario Amiibo
The Super Mario line of Amiibo function the same as the Super Smash Bros. line in the game as long as you are using a figure that has a corresponding fighter. They were released on March 20th, 2015 to coincide with the release of Mario Party 10. So far the only figure that doesn't work with Super Smash Bros. is Toad. A Silver Mario Amiibo is set to be released on May 29, 2015.

Yoshi's Woolly World Amiibo
Similar to the Super Mario line of Amiibo, you can use any of your Yarn Yoshi Amiibo in the Super Smash Bros. game and it will function the same as a regular Yoshi Amiibo. However this line does not contain any characters not featured in Super Smash Bros. for Nintendo 3DS and Wii U.

Splatoon Amiibo
Splatoon amiibos are used in the new Splatoon game for Wii U.

Trivia

 * Amiibo for all Super Smash Bros. for Nintendo 3DS and Wii U fighters will be released including DLC fighters. However it is unknown if this includes the Mii Fighters.
 * Some Amiibos have shown some defects in their appearance, such as a Samus with two arm cannons and a Marth with an extra head.
 * A number of fans have customized their Amiibos, most often by repainting them to resemble their alternate colors. Some people have gone so far as to make customized Waluigi, Dixie Kong, and Mewtwo Amiibos, complete with packaging.
 * A level 50 Fox Amiibo called WaveShine "participated" in a tournament in Canada as a joke; he won the losers round 1 and 2, but lost in the semi-finals against FireFly, one of the best Brawl players in the region.
 * Some players have begun organizing Amiibo-only tournaments, such as the Amiibo Fighting Championship.
 * Four of the Wave 3 Amiibos are exclusive to certain stores: Meta Knight is BestBuy exclusive, Shulk is GameStop exclusive, Rosalina is Target exclusive, and Lucario is Toys R' Us exclusive.
 * In Wave 4 three of the Amiibos are store-exclusives: Ness for GameStop, Jigglypuff for Target, and Greninja for Toys R' Us.
 * Marth, Ike, Lucina, and Robin's Amiibos will be fully compatible with the game Codename: S.T.E.A.M.
 * Since the release of the Super Smash Bros. line of Amiibo, multiple other lines have come out, including Super Mario, Splatoon, and Yoshi's Woolly World.
 * The Amiibos shown at E3 are different from the ones that were released as they were just prototypes.