Since a lot of people have commented about the "Ghostliness" of my Jack-O-Lantern, I thought I might explain a few points about that.
1) It's intentionally very ghost-like. I didn't design a flaming pumpkin; I designed a Jack-O-Lantern. Jack-o-Lanterns are part of Halloween, which is deeply rooted in concepts of spirits and spooks. If I try to eliminate the ghost aspect of the design, then it becomes a vegetable that is lit on fire. That's not interesting or fun.
2) I think a Jack-O-Lantern design can work for any two of the following three types - Ghost, Fire, and Grass. In my design, I think there are very clear elements of all three.
There are other pokemon like this. For example Beedrill is obviously a bee. A bee is a flying insect that stings. That connotes three workable types -- Bug, Flying, and Poison. Unfortunately you can only have two. Beedrill happens to be Bug/Poison despite the fact that the art has very prominent wings in the design. So, to acknowledge the obvious Flying connection, they gave Beedrill moves like Aerial Ace and Roost.
Another less-obvious example is Flygon. Although it is Dragon/Ground, it's artwork and pre-evos are very clearly Bug-like. That's why Flygon has Bug moves, and (most people forget this) it is part of the Bug breeding group. This acknowledges a third "hidden" typing that can't be part of it's official dual-type. (You could argue that Flygon actually has four types, with Flying being the fourth).
So, if this design were chosen, I could easily see us giving it some good Ghost moves like Shadow Ball. Maybe even give it core Ghost stuff like Destiny Bond or Pain Split. I wouldn't make it gamebreaking, but acknowledging a "third" typing via the movepool, is not unprecedented.
3) I'm not planning on changing the design, because I don't think it will win anyway. I think it's a good concept and I think I executed it well. But, even with modifications, I don't think it is a better concept than some of the others I've seen posted here. I think it is good enough to be included on the poll, but some of the other designs are more suited to CAP voter tastes.
In general, CAP tends to vote for things that are very literal translations of the intended typing and build. My design doesn't really fit that mold. Even with changes, it will still require a little "creative justification". There are several other designs that are easily identified as pure Fire/Grass, and are incredibly well-done.
If my design makes the poll, I'm not sure I will vote for it. That's how much I like some other designs. I don't want to spend time reworking a design that likely will not be selected. I only colored my pic, because based on feedback, it looked like it had a chance of making the poll. I didn't want to appear to be a slacker artist for not "finishing" my submission. Plus, whether it wins or not, I really enjoyed working on it. I think it looks extremely cool, and I would love to see that thing come out of a pokeball someday.