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Bigger Boo is the third boss of Super Mario World 2: Yoshi's Island. He was a regular Big Boo until Kamek fused him. The Bigger Boo is a bigger verison  of the Boo as the name implies.


The player must defeat him by throwing eggs at him. If Yoshi looks at him, he becomes transparent and invulnerable. Yoshi must throw eggs by bouncing off the walls. With every hit, he becomes bigger until he explodes. He can only be found on the level called Bigger Boo's Fort.