Cucco

Once it takes enough damage, a Cucco becomes enraged and calls its feathered friends in for backup, attacking the last player that struck it. As you're intently attacking an opponent, be careful not to inadvertently hit a Cucco! A Cucco (, Cucco) is a chicken-like creature found throughout the series. They appear as an item in both versions of Super Smash Bros. 4, in Super Smash Bros. Ultimate, and additionally appear as a Smash Run enemy in.

Origin
Cuccos are a domestic animal found in many titles in The Legend of Zelda series, making their debut in A Link to the Past. In some games, Link can carry Cuccos above his head to slow his descent whenever he jumped. However, Cuccos would also become hostile if they were attacked too often, often in the form of swarms of indestructible Cuccos flooding the screen and attacking Link only stopping until he perishes, waits ten seconds or leaves the area.

As an item
Cuccos appear as items. Like Mr. Saturn they are living, throwable items that can walk around on the stage without impacting gameplay. A Cucco can be hit by attacks, and if it takes 13% damage or more, it will fly off and summon a flock of Cuccos that target the player who hit it last, which deal 1-4% damage each. Although the Cucco attack will be targeted at the player who hit the Cucco last, all players can be hit by the Cucco flock. There are also certain attacks that can provoke a Cucco even while it is being held by another player.

A Cucco will also trigger its attack if it is thrown at an opponent - even if they are shielding or invincible - which makes them the target of the Cucco's attack. Unlike a Cucco provoked by attacks, only the thrower's opponents are vulnerable to the attack of a thrown Cucco.

When provoked through a stage hazard or boss, a Cucco's attack can hit all players. If it is hit by a stage hazard or neutral boss, the Cucco will target a random player. If it is thrown at one instead, it will target the player that threw it.

While unlikely to outright KO opponents, the rapid hits from the Cucco flock can potentially knock players offstage, and launch them downwards repeatedly (potentially even to the lower blast line), making recovery difficult or impossible.

Like most elements from in Smash 4, their design is based on their appearance in Twilight Princess, though their coloration is slightly whiter.

In Smash Run
Cuccos appear as enemies in Smash Run, where they appear as their two-dimensional sprite from The Legend of Zelda: A Link to the Past as opposed to the three-dimensional models for the item. Unlike most enemies in Smash Run, Cuccos will ordinarily not attack characters: they will, however, summon a swarm of other hostile Cuccos if they take sufficient damage. As an added visual cue the screen also flashes red, akin to what occurs in Cucco swarms in A Link to the Past. While Cuccos can be attacked, grabbed (which will not anger them) and thrown, they cannot actually be defeated, nor can they drop items or power-ups; as such, Cuccos primarily act as an obstacle for players to fight around as they attempt to defend themselves from other enemies.

Trophies
The enemy Cucco trophy is exclusive to, while the item one appears in both versions. The item trophy is considerably rarer than other trophies.

In Super Smash Bros. Ultimate
Cuccos return as an item in Super Smash Bros. Ultimate. Their function appears identical to Smash 4.

Trivia

 * As an item in standard battles, Cuccos take on their appearance from The Legend of Zelda: Twilight Princess. Ironically, Twilight Princess is the only The Legend of Zelda game in the series where attacking them does not result in them attacking the player; instead, players could take control of the Cucco for around ten seconds.
 * In Smash Run, Cuccos appear as enemies in their 2D sprite form from The Legend of Zelda: A Link to the Past. However, their enemy trophy uses their models from The Legend of Zelda: Ocarina of Time 3D. This suggests the possibility that their 3D model was intended to be used in Smash Run, but similar to the Flying Men in Magicant, their 2D sprites were used instead to lessen the strain on the 3DS system.
 * There is a glitch involving Cuccos when they're used as an item; if it is thrown offstage, then the Cucco may occasionally attack the character who tossed it, though it won't deal any damage or even make them flinch.
 * Their enemy trophies in make a pun on the word "cuckoo".