Figure Players are the primary use of amiibo in the Super Smash Bros. series, being their only use in Super Smash Bros. 4.
In Super Smash Bros. 4, amiibo, when scanned by the console, allow the character represented by the figurines to be used in-game as a customized CPU opponent. Any amiibo figure corresponding to a Smash character may be used (not only Super Smash Bros. series amiibo); however, amiibo cards (such as the Animal Crossing amiibo cards) cannot be used as Figure Players. amiibo can be used to load Figure Players into any copy of the game, even if the character has not been unlocked or downloaded.
The Figure Player can be modified by players with character customization options, which can then be saved to the amiibo. As with other player-designed custom sets for characters, amiibo can be assigned a name and a specific alternate costume.
Unlike normal fighters, amiibo fighters' stats are modified by "feeding" them equipment, including equipment that fighter cannot normally use (e.g. a Mario Figure Player can be "fed" Hammer equipment, despite not being able to equip it), but any "fed" equipment is permanently lost. There is a limit to how many times a Figure Player can be fed before battling. A Figure Player can also "learn" up to three bonus effects from the equipment they are given. By default, the amiibo's stat total is capped at 120.
The Figure Player functions as a specialized computer player, with the tag "FP" (Figure Player) above them. Figure Players start at level 1 like regular CPU players, but as they fight more often, they can continue to level up, to a cap of 50. As they gain levels, Figure Players can potentially "learn" techniques from other characters: if a player frequently uses long-ranged, camping techniques, then the amiibo will also begin to emulate this behavior. This learning continues even after the 50 level cap is reached. In addition, a Figure Player can gain improved fighting statistics—such as improved damage, knockback, and reaction times—as its level increases. Finally, higher-leveled Figure Players can adapt to individual matches faster than lower-leveled ones; for example, if an opponent takes on an aggressive, rush-down style against a Figure Player in one match, it will begin to make more use of defensive techniques like spot dodges and rolls. However, even high-level Figure Players may struggle on complex stages, like walking back and forth before fighting on stages like Gaur Plain.
Figure Players also earn gold and other items while fighting, which are retrieved when checking them in the amiibo menu. Aside from gold, they can also earn custom parts or trophies. The longer the Figure Player has fought, the more presents and gold are received. These items can be retrieved when the amiibo is scanned on its owner's console under the amiibo menu.
While Super Smash Bros. for Wii U natively supports amiibo, Super Smash Bros. for Nintendo 3DS was unable to do so at launch. Version 1.0.5, released on February 9, 2015, added support for scanning amiibo if the game is played on a New Nintendo 3DS or New Nintendo 2DS, while version 1.0.8, released on June 14, 2015, added support for an external NFC reader/writer accessory, enabling support for earlier Nintendo 3DS and 2DS models when used in conjunction with this hardware.
Owing to their ability to be "trained" and used on other consoles, amiibo tournaments have become a minor side-event at some Smash 4 tournaments.
In Super Smash Bros. Ultimate, amiibo figures representing fighters in the game can be scanned to load Figure Players into the game.
Figure Player data from Super Smash Bros. 4 can be transferred to Ultimate, but high level Figure Players are leveled down to a set level upon conversion (for example, a level 50 Figure Player becomes level 12). Once transferred, the amiibo data will no longer work in SSB4. Alternately, the player can clear the pre-existing Figure Player data and start again in Ultimate.
Figure Fighters can inherit spirits and gain their effects, but the spirit will be permanently consumed. The Figure Player will also gain the spirit type, and its status will always be active regardless of whether the player has spirits on or off in the rules. A Figure Player can inherit up to 3 of support spirits' skills. This will also alter the Figure Player's personality (see "Personality Traits), with some personality types seemingly available only through the use of Spirits.
Additionally, the ability for a Figure Player to learn and gain experience during battle can now be enabled or disabled on the amiibo menu, essentially freezing the AI. Figure Players can also be used in the game's Training Mode in place of a regular CPU, though they do not gain experience.
In Ultimate, Figure Players can have personality traits that describe how they behave in battle. The different personality traits are detailed below.