User blog comment:Sylvandyr/The math behind the Battle Arena/@comment-6385036-20130705034410/@comment-4830404-20130705035758

Actually, Diamond is just a neutral type against Yellow... but yes, it was one of the better chances. When a "better" chance is 40%... something's wrong -_-  The way that TeamLava handles the Battle Arena is stupid imo. They just keep making it harder and harder so that people will spend gold on the Ultimate. It's not even hard skill-wise, it's just pure luck.