Well, not an official one, anyway. This is a fan-made computer-based Street Fighter style Pokemon fighting game! Check out the video!
If you want to play this sucker for yourself, here's a MegaUpload link.
On an additional note, Ability of the Week will be a bit belated this week. I have the article started, but I just haven't had an opportunity to complete it. I'll have that to you guys as soon as possible, though. Have a day!