So here's my idea:
Obviously he's supposed to look like a scarecrow. At first, I was going to give him legs (typical raggedy scarecrow-looking ones), but then it reminded me too much of Blaziken (because it had hay sticking out at its pant leg openings, which looked like the bottoms of Blaziken's legs). So I went for a typical ghost-like legless "puff." The problem is now I don't know if he looks too much like Duskull... >.>
His head is supposed to look like a skull (white with black eye sockets and glowy eyeballs), and his torso is composed of hay (bound together by ropes). I'm not too sure about what his hands look like yet, but I kind of imagine them as being wooden-like, kind of like the faun from Pan's Labyrinth or the Keeper of the Grove (from Warcraft III).
He fights mainly with his claws and punching moves, but I can also picture him charging up a shadow ball attack pretty well. (I guess that puts his attack and special attack stat at about equal, with the former being a bit higher.) For his bio, I was thinking about something along the lines of how it protects farmers' crops from flocks of Murkrows (as illustrated above). He loves his corn, lol. Basically he's one of those Pokemon that look creepy but is really just misunderstood.