Cucco

Cuccos are a species of bird from The Legend of Zelda series that resemble chickens. They first appeared in The Legend of Zelda: A Link to the Past.

Normally docile, these domesticated birds can assist Link by acting as parachutes if Link grabs them, causing Link to glide in the air. On the other hand, if they are attacked by Link, they will crow loudly and summon more Cuccos to charge Link as a group, chasing after him and pecking at Link relentlessly until Link either escapes town or runs out of health. They are completely invulnerable to attack during this fury state, making them much more dangerous than even most bosses in the game.

In M.U.G.E.N, the Cucco was made by RicePigeon as a joke character called Cucco's Revenge Squad. The character first appears as a punching bag, until it reaches half health. Afterwards, the character then starts to relentlessly charge the opponent while summoning more Cuccos until the opponent is overwhelmed by the entire flock, mimicking the behavior from Ocarina of Time.