These are the Ranks of trainers mentioned in the story so far. As for how true they are exactly... *shrug*
Roxanne - Expert
Brawly - Expert
Flannery - Expert
Brock - Expert
Misty - Expert
Erika - Expert
Falkner - Expert
Bugsy - Expert
Whitney - Expert
Chuck - Expert
Lt. Surge - Expert (Expected higher)
Tate & Liza - Elite
Clair - Elite
Morty - Elite (Master soon?)
Koga - Master (Poison)
Giovanni - Master (Ground) (Suspected Champion)
Blaine - Master (Fire)
Wattson - Master (Electric)
Norman - Master (Normal)
Winona - Master (Flying)
Juan - Master (Water) (Speculation)
Lance - Champion
Steven - Champion
Wallace - Champion
Professor Oak - Champion
Pryce - Champion
Brandon - Champion (Speculation)