From the Super Mario Wiki
A Power Bee is an insect found in Yoshi's Story. As the Power Bee isn't an enemy, touching the Power Bee doesn't hurt the Yoshis. Yoshis can eat the Power Bee to refill health. They are helpful when a Yoshi's energy is low and can be found in a boss fight against Inviso, as well as in several other levels.
Names in other languages
||Pun on "Biene" (Bee)
- ^ Yoshi's Story official website (Wayback Archive). Retrieved April 23, 2015.