I Missed the Battle Royale text..?

Question

I just finally finished the Master Rank for the battle royale in sun and moon and I got some text telling me that I unlocked something else. To my understanding its not a next rank and I unlocked nothing in the battle tree. And over time ive forgotten what it said, please help me out here :-)

Answer 1

After you beat Master Rank for the first time, the game gives you a little notification that you unlocked a new battle style. You can change your battle style by talking to a man at Malie City's Outer Cape, and the one you unlocked is the Idol Style. (You'll pretty much just pose and throw Poke Balls differently.)
This happened to me, too, by the way.

Source: personal experience and http://www.serebii.net/sunmoon/battlestyle.shtml