I played my first Black with Serperior, and her movepool wasn't too bad. The dragon move was a nice addition to make her useful in the final gym...shame that mine happened to be Bold natured ^^;
You mean Dragon Tail? I dislike that move with a passion. It isn't the most accurate move in the world, plus it always hits last, so it doesn't come in handy very much, at least in my opinion. I've pretty much given up on Serperior. I thought it would be a good Pokemon to use, but it's very unreliable in my experience. I'll just train a Lilligant or a Whimsicott next.