Dr. Slug stands tall and lanky, his elongated limbs and slender frame giving him an almost skeletal appearance. His skin is a pale, ghostly white, contrasting sharply with his dark attire. He wears a long, flowing dark gray lab coat that billows around him, lending an air of theatricality to his presence. The coat is adorned with various pockets, stuffed with an assortment of sinister gadgets and devices, hinting at his dangerous intellect.