No, you're not seeing things. I actually made a villain that's basically a living slimeball.

Captain Sludge actually wants to have the entire world covered in slime as to seek to punish those that've outcasted his sort.

The captain's minions are just as slimy and filthy as he is, which probably makes it where Kirby wouldn't even want to eat something so disgusting.

Muckling: A purple slimeball of an unidentifiable sort, but there's plenty of them.

Cannoneer Mud: Mud just loves shooting cannons. And what does the cannons contain? Mud.

Lookout Grimeye: The lookout, Grimeye is an eyeball covered in, well, grime. And he doesn't look like much, but he can fight better than most minions.

Arsenal Officer Scum: Dark, vile, and... pointy. Scum is a slime version of Spiny. He loves his weapons, but for his spikes he allowed part of his head to dry, then pull it out slightly until it formed the spines on his head.

First Mate Filth: Filth is a furious fighter and appears to be made out of some sort of mold. Questioning him is to meet his axe and hook.