Awesome drawing of an awesome character! I first off gotta point out I love how you drew Stardust Speedway in the background. It's very fitting but also just looks very stylized and nice. As for Metal himself, I love how you drew him! The linework is perfect, the shading is amazing, and the posing fits him very well. I especially love the subtle shading on the eyes, and the shading on his core. Great work, keep it up!