Whirly Fly Guys are a type of Fly Guy that acts as a enemy in Super Mario World 2: Yoshi's Island. They are rare enemies. They flash different colors all the time. Unlike Fly Guys, they stand on the ground first, and when Yoshi goes close to one, they start moving up slowly, to get away from Yoshi. Yoshis can't stomp on them, because they will get hurt.
- If Yoshi eats one and spits it out, it will become a Green Shy Guy.