solo male, Mecha Knuckles, robot echidna, gray skin, red compound eyes, white core, yellow gloves, gray shoes, battle pose, gray sky, jungle, rocks (3D, high quality, masterpiece, 4K UHD)

Cat ears, Extra characters, multiple people, chibi, multiple characters, (deformed, distorted, disfigured:1.3), poorly drawn, bad anatomy, wrong anatomy, extra limb, missing limb, floating limbs, (mutated hands and fingers:1.4), disconnected limbs, mutation, mutated, ugly, disgusting, blurry, amputation