Parasite

He's not the only one of his kind in the world. But they're very uncommon to find. They're considered a lowly pests/parasites and get squashed out easily. Some have adapted by hiding away in corners of the world. 

Or like this specific lil guy, he makes himself costumes to wear to disguise himself. He has a wardrobe of different animal costumes for when he leaves his hide hole/home.