Beast Nuco is a mutant anthropomorphic dinosaur with swampy-green scaly skin, completely neon-lime eyes, yellow protruding teeth, and two mouths. He's intimidating and threatening, but he's innocent, thoughtful, and benevolent on the inside. Beast Nuco is the Yin of Nuclear Dino and the counterpart to Nerd Nuco, who's close friends with him. He was made by a machine which splits a person into two separate personas.