An anime-style illustration of a karate character, a young boy with dark brown hair and big eyes wearing a white karate gi striking a fighting pose. He has short hair, a round face shape, chubby cheeks, and simple facial features. He is doing karate. The background should be a plain black to highlight the figure. Use vibrant colors for the outfit and skin tones to give it depth and contrast. Make sure his posture exudes confidence as if readying himself in combat, in the style of karate.