Very smooth with ideal shading and highlights. The color scheme seems to be spot on with his in-game and anime appearance. His posture is ideal and you managed to capture a look of intensity in his eye.
The flame on the end of its tail has a unique appearance that separates it from the rest of his body without being distracting. The glow from the flame reflecting on his skin is also a very well drawn detail.
As for the background you managed to keep it just as smooth as the foreground with enough highlights and lowlights to give it definition as a cavernous setting.
All in all, this very well done. The only thing I'd change is the background, but only slightly. Perhaps a small trickling lava flow to complement his Fire Type or the peak of a large mounting to acknowledge his dragonesque appearance.
This image was very well expressed and is worthy of recognition. Keep up the good work!