Fix for A Fighting Champion Achievement
Me and my friend had attempted this achievement earlier today 3/22/13. I had gotten the achievement, since I had boosted it without him, but he still needed it, so i helped him out with some dummie accounts. Now after 2 hours of trying, we decided to have him (The person getting the achievement) go onto another console, and create a new title. So once we did that, and he got his wins, he got the achievement. So if you don't have a spare console, you may want to try restarting, then making the new title, that is of course if you're getting the achievement.