666 is a black experiment with red patches around his eyes, and a red patch running from under his chin down to his stomach, two dark blue marking; one on the back of his head, and the other on his back, large rabbit-like ears, a wide mouth with sharp teeth and a long purple tongue, a domed round navy nose that rests in the center of his face between large black, tear-shaped eyes, a small, short, stubby tail that juts out from his rear, clawed hands and stubby legs that have shorter claws themselves, two nose wrinkles, one chin wrinkle, three tuffs of sharp hair on top of his head and on his chest as well as two extra, retractable arms, two retractable wings tipped with red and a very dark navy that run down his back sharp retractable claws on his front and back paws (middle paws only have claws out) and two retractable antennae on his head. He stands on 3 feet 5 inches tall and weighs 120 lbs.
He can be abnormally strong, virtually indestructible, super intelligent and very mischievous. He can think 10,000 times faster than a supercomputer, be fireproof and bulletproof, can spit acid, can hear in different hearing levels, can see in the dark, can jump really high, can climb up walls and walk on ceilings, can roll into a ball/buzzsaw, have super sight, smell and hearing, night-vision and heat-sensing vision, be invincible to guns, bombs, blades, lasers, lava, acid and plasma, can hear something from 3 thousand miles away, can smell scents up to 9 miles away, can spot everything from 10 miles away, can puncture anything with his claws and teeth, has regurgitated food, and has even taken it out of his stomach by hand, and can also withstand low pressures. He also secretes a form of venom from his three back spines, and can also lift objects 3000 times his own weight (but not an ounce more). He is mostly physical, but also has four basic plasma guns on hand. He also dresses in a black uniform.
His only weakness is fire.