From WiKirby, your independent source of Kirby knowledge.
||These enemies will blast cannonballs at Kirby, but he can fire right back with an Air Blast!
— Description of Cloud Cannon from the manual.
Cloud Cannon is a Shotzo being carried by a faced balloon which appears in Kirby Tilt 'n' Tumble. It can be seen as similar to Kabula, as it fights in a similar manner, and is also defeated using rapid-fire Air Bullets while flying.
Cloud Cannon is found floating around in the open sky, and will track Kirby in order to keep him in its sights once he gets close enough. Cloud Cannon regularly fires shots at Kirby which will hurt him on contact, and Cloud Cannon itself is also painful to the touch. Cloud Cannon takes three Air Bullets to defeat. Each time Cloud Cannon is hit, its facial expression changes, going from neutral, to dour, and then shocked. When defeated, the balloon of Cloud Cannon pops, leaving the Shotzo to fall into the open sky. If Kirby does not defeat Cloud Cannon quickly enough, it will fly away.
Cloud Cannon appears only in Lvl 6-3. One Cloud Cannon in particular needs to be defeated in order to earn the Red Star in that stage.
Sprites from Kirby Tilt 'n' Tumble (it should be noted that the orange color only appears temporarily while Cloud Cannon is taking damage)
Kirby battling a Cloud Cannon in Lvl 6-3