Cucco

Cucco is the small chicken that appears in nearly every Zelda game to date. Cuccos are very infamous creatures, since their introduction in The Legend of Zelda: A Link to the Past, if Link hits a single Cucco enough, it will effect its "revenge", bringing a flock of Cuccos to take him down until he leaves the current place or if he faints. This is not the case in The Legend of Zelda: Twilight Princess, where hitting enough a Cucco will actually make it playable for about 10 seconds.

In Super Smash Flash 2
Cucco is an item in the upcoming Super Smash Flash 2. It can be thrown like most other interactive items; however, if you jump while you are holding it, the Cucco will start flapping its wings frantically, slowing your descent. However because of a glitch if you land while using the Cucco you will be stuck until you are attacked. Also, if you attack it well enough, it will bring some other Cuccos and one golden Cucco that will attack you. The golden Cucco does more damage than the regular Cuccos. The flock will do damage to any player that comes in contact with them, however they will only chase the one player who attacked them, meaning they will not rack up damage to others nearly as much. The best thing to do is to run away from them.

Trivia

 * Cucco was early confirmed as an Assist Trophy in the second Smash Flash DOJO!!, but as the DOJO!! was remade, Cucco was re-confirmed now as an item. The only change made was that Cucco can now be picked up to slow the player's descent.
 * The Cucco will be an item in Super Smash Bros. for Nintendo 3DS/Wii U thus making it one of the few elements that first appeared in the Super Smash Flash (series) before appearing in the official Super Smash Bros. series.