From WiKirby, your independent source of Kirby knowledge.
Zebons are creatures native to Popstar and some other planets nearby, like Shiver Star. They were introduced in Kirby's Dream Land 3 and act as Cannons.
Zebons resemble large bubbles of a translucent bright green color, and sport rudimentary happy expression on their face. They are slightly larger than Kirby is. While they appear in some levels, they are not really enemies since they do not harm Kirby when he touches them. When being touched, the Zebon absorbs the character nearby into it. The character will then be released shortly after, and launched into a certain direction. Sometimes a Zebon slightly rotates after having absorbed someone. In that case the player can control the Zebon's launch direction by pressing a button when it is facing the right way. While being launched by a Zebon, Kirby is invincible and can also defeat enemies if they happen to be in his way. This condition lasts until he hits an obstacle like a wall, or another Zebon.
Zebons make a cameo appearance in the anime (more specifically the episode The Big Taste Test) where Chef Shiitake claims that their meat is the most delectable. The copy of the book King Dedede ordered also claims that Kirby himself is made out of Zebon.