My prediction last month did not come true. Neither Rayquaza nor Groudon have taken the #1 spot, and Kyogre remains the #1 most used pokemon (and as of right now, I don't see that changing) and by a respectable margin. For the first time in this ladder's history, the RSE trio's grip on the top 3 has been shattered. There are a number of reasons for this. One battler, by himself, had significantly impacted usage by himself by using the same team repeatedly (Darkrai/Dialga/Groudon/Mewtwo/Scizor/Rayquaza). Out of the 4249 uber battles last month, he played in a staggering 1022 of them, meaning that he is responsible for approximately 12% of all usages that month. To my knowledge, he has played very little this month, so any conclusions on shifts in usages must keep this in mind. Second, Darkrai and Dialga still rose this month (especially for the former). I'll go into more detail on these individually.