Burning

Burning (previously known as Fireball in Kirby's Adventure and Kirby's Dream Course, and Burn in Kirby 64: The Crystal Shards) is a copy ability that debuted in Kirby's Adventure in 1993 alongside Fire.

Kirby's Adventure / Kirby: Nightmare in Dream Land
This ability can be granted by inhaling either Flamer or Fire Lion.

Kirby's Dream Land 2
In this game, Burning can be granted from Flamer (once again), Efreeti (after defeating it), or from Mr. Bright's stars.