the power rankings is the product of a small panel of people that collect information about a certain period of time (typically called a season). when they look at the information and the data, they put out a ranking for that period with the players that have performed the best in that region. it's that simple.
what this means, though, is that you have to perform exceptionally well to get on. at least, usually...you have the honor and the curse of living in arguably the best region in the world for competitive brawl, so getting ranked is going to be incredibly difficult. getting recognized, though, is comparatively easy--just be good and get wins.