From the Super Mario Wiki, the Mario encyclopedia
Retrieved from "https://www.mariowiki.com/index.php?title=Peeper&oldid=2603995"
If a Yoshi eats one, it will give him an egg instead of healing him. When a Peeper is shot down, a puff of smoke will appear, and the Peeper will lose its feathers and fall away. If Yoshi eats a Peeper when they lose their feathers, it will heal him back to full health.
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