Fuzzy

Fuzzies are small, black furred parasitic creatures, capable of sucking away enemies' Heart Points with a bite, possessing two strabismus eyes and large teeth; despite displaying some level of intelligence and the ability to speak, Fuzzies are, for the most part, wild and uncivilized beings. Fuzzies have the ability to secrete webbing-like strands from their bodies, though this ability has largely been phazed out in modern times.

Fuzzies first appeared in Super Mario World as particularly rare enemies that were completely indestructible; found circling the wire-like constructs floating in midair, Fuzzies would not directly attack Mario or Luigi and would only hit them if they got in their way.

Fuzzies make a return appearance in Paper Mario, which reveals a large group of them inhabit the woods behind Koopa Village. When Mario first reaches Koopa Village, he will find it under attack by a horde of Fuzzies who are harassing the Koopa Troopa inhabitants of the village. After Mario defeats the apparent leader of the Fuzzies, who had stolen the Shell of Kooper, in battle, the Fuzzies promised to behave and stop attacking the village, at least, for a while.

Fuzzies appeared in Mario & Luigi: Superstar Saga as projectiles that were spawned by the Fuzzbush, suggesting a possible relation. Unlike other Fuzzies, these could poison Mario or Luigi. Since they were just projectiles, they weren't technically enemies in this game.

In Paper Mario: The Thousand-Year Door Fuzzies first appear in Shhwonk Fortress and later, one appears as a member of the Fuzz fighting team in the Glitz Pit. In Super Paper Mario, Fuzzies appear as enemies on the Planet Blobule, where they attack other creatures by bouncing into them.

Appearances in Other Media
In Super Mario Adventures, a Fuzzy makes a small appearance, being among the monsters sent by Bowser to attack Princess Toadstool's Castle.