Pocket Egg

The Pocket Egg is given to you by the Cucco lady as adult Link in Legend of Zelda: Ocarina of Time. It is just like the egg given to you by Malon as Young Link and hatches into a Pocket Cucco when the sun rises. This is used to wake up Talon and is then traded for Cojiro.

The Pocket Egg is part of the trading process to obtain Biggoron's Sword.