The Eye Worm looks like a string of squarish, segmented rocks. Each segment has an eye on it.
Role On Astro-Knights Island
It is found inside the Volcano on the Fire Planet. When you first see it, it is curled up in a cube. But when you approach it it will lash out at you and roll into a defensive ball. You can jump over it as it rolls toward you. It is located right outside Meltdown Cave.