I'm sure my art doesn't, so let my words do justice to my vision.
The obvious inspiration here is, as I'm assuming most of you are able to tell already, is a Tiki. It's big, it's wood, it's on fire. Already covers all three bases, all right! Now, obviously, a Tiki head doesn't allow too much room for interpretation - it's basically a Hawaiian log o' lantern. So, instead of straining myself trying to make him unique and totally out there, I took what we had and ran with it. It's simple, and his basic makeup conveys both types of our Pokemon with just accuracy. I knew he was simplistic, so he also had to be expressive - carry his weight in flavor, so to speak. The big, Gastly like eyes are menacing in effect, and flickering flame behind the pupils and the brow that's pointed both relaxed and furrowed at the same time convey an air of madness. I also wanted to keep it light and somewhat humorous, compared to the horrible looking (in effect, not in art!) Syclant and Revenankh. His big toothy grin is slightly lit from behind, and he's traveling on a flame out of a hole in his bottomside. Also, in a RARE CASE OF GENIUS BY LORD GLOOM, I made sure that his Grass subtype wasn't overshadowed completely by the fact that he's essentially a fireball - if you'll notice the odd cross thatching in the wood and the raging fire coming out of his top, he was indeed, in case you might have been wondering, modeled to look like a big ol' pineapple. It fits with the Hawaiian theme, and is just a subtle visual reminder that he is indeed part Grass.
Also, the offer is still open if anyone would like to tidy him up and make a nice picture out of him, so to speak.