A Boo Balloon is a Boo in the shape of a blue balloon in Super Mario World 2: Yoshi's Island. They race about the screen, trying to deal damage to Yoshi. But if hit three times, they will yield coins or the occaisional ! Switch. These enemies are not to be confused to this enemy, Balloon Boo; an enemy who appears in New Super Mario Bros.
| show [Edit] Yoshi
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| Characters | Mario • Yoshi • Luigi | |
| Enemies | Puzzle pieces | Bloober • Boo Buddy • Little Goomba • Piranha Plant |
| Other | Bob-omb • Cheep Cheep | |
| Yoshi types | Little Yoshi • Yoshi • Winged Yoshi • Star Yoshi | |
| Items | Apple • Cherry • Coin • Fire Flower • Grape • Key • Melon • P Switch • Pineapple • Peach • Red Shell • Strawberry • Super Mushroom • Super Star • Yoshi's egg | |
| Miscellaneous | Gallery • Hetchara Ban DX | |
