Tower of Mastery

Tower of Mastery is a tower located in Shalour City. It is currently run by Gurkinn and the successor is Korrina. It is the tower of where the first trainer evolved Lucario using the Mega Evolution. It is where the player can receive one of Korrina's Lucario and the Mega Ring at the top of the tower after the player defeats Korrina at the Shalour City Gym and then, tested with Lucario against Korrina's another Lucario.