Sulkworm

The Sulkworm is a rare enemy from  Kirby's Epic Yarn  which appears in the cut scene after the 1st stage, and then appears in two later stages.

Slugzilla
The Sulkworm looks like an overgrown green slug with a wrinkly bottom and four interchanging yellow and orange spots towards the back. With a pair of large red buttons with smaller orange buttons ontop for eyes, this creature is a towering mass approximately six times the height of Kirby, if you're including the large yellow and red twisted yarn antennae.

Sulking in Silk
When the Sulkworm sees you with his two button eyes, it will begin to spit light grey wads of yarn at Kirby and Prince Fluff. If either of our two heroes get too close to the Sulkworm, it will raise its body and slam down ontop of them. There are two ways to go about fighting this fat foe, the most basic is by grabbing their spit wads and throwing them back at it twice. The other is harder, but it goes down in one hit instead, doing this is by jumping over this towering menace and getting onto it's back and turning into Weight Form to crush the Sulkworms back.

Casting
"This big slug likes to cush his foes. He spits some mean thread, too!"

- Casting

Did You Know?

 * In the cut scene after the first stage: Patch Castle, Prince Fluff is grabbed by a Sulkworm and tossed around in his mouth for a while. This tossing around in the mouth attack is never used in the main game