Giant Egg
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A Giant Yoshi Egg is an object used by Yoshis in the Yoshi's Island series. It is much larger than a normal Yoshi Egg. The Giant Egg can only be made if a Yoshi swallows a Fat Guy. Making their first appearance in Super Mario World 2: Yoshi's Island, giant eggs proved to be quite helpful in fighting difficult-to-defeat enemies, such as the final boss. They can defeat all on-screen enemies merely from the shock-wave they give off when thrown. In the final battle of the game, giant eggs are carried by balloons on the stage; the Yoshi must grab these and aim them at Baby Bowser (as a giant). Giant Baby Bowser will be defeated once successfully hit with a few giant eggs.
Giant eggs also appeared later Yoshi's Island DS; they helped the Yoshis fight the Final Boss. In this game, the Yoshis defeated the final boss, Giant Bowser, similar to in Super Mario World 2: Yoshi's Island. This time, four Giant Eggs are brought on the stage by one balloon. Each of the four Yoshis get one – then as all of the Yoshis aim the eggs at Bowser and throw them at him, Bowser will be defeated after a few hits.