sleet
aragornbird
Wyverii
DougJustDoug
Man, I didn't think I'd vote in this way, but there's something really magical about sleet's sprites. The pose seems to be accurate to what the spriter wanted, and I'm a fan of the pose itself as well. I actually liked that the sprite broke away from the Frankenstein depiction of most of the others and just became its own mon.
Oh, and honourable mention to DarthVader317 and Gun6, I guess.