Eggs are objects that hatch into a Pokémon. The appearance of the shell of the Egg is based upon the Pokémon which is inside it, in the Anime. In the game, Eggs hatch after completing a certain number of steps and were introduced in Generation II. A special event-obtained egg is the Manaphy Egg. It looks different from every other egg and contains Manaphy.
The Anime introduced the concept of Pokémon Eggs in Attack of the Prehistoric Pokémon. After waking up from a Jigglypuff-induced nap thanks to its song, a Pokémon Egg was found near where Ash was laying. This Egg would hatch into a Togepi in Who Gets to Keep Togepi?; the newborn Pokémon would follow Misty around and become a part of her Pokémon team.
Eggs occasionally get introduced throughout the Anime, which add a new Pokémon to the team of its owner when hatched.
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