Mock Up (also called Bogus Blimp) is an enemy in Super Mario World 2: Yoshi's Island. It appears to be a balloon with a 1-Up text on it. If a Yoshi approaches a Mock Up, it begins to inflate. However, if the Yoshi eats a Mock Up before it inflates, he is granted an extra life, otherwise the Mock Up explodes and reveals that it was actually a Fly Guy under the disguise of a 1-up balloon. The resulting explosion hurts Yoshi, and the Fly Guy laughs mockingly while flying away. Mock Ups are colored either red or light green, although they act no different from one another.