Aetus Battle Frontier

The is, as the name suggests, the Battle Frontier of the Aetus Region, with aspects unique to any Battle Frontier before it.

Battle Empyreal
When all five Frontier Brains have been defeated, and all five Frontier Keys obtained, the gate at the north end of the Battle Frontier will open and allow the player access to the Battle Empyreal, a huge floating battling paradise in the sky. Many elite Trainers can be fought here, including the Elite Four, the Gym Leaders, the Frontier Brains, and even the Champion. The opponents are random every day, making the final challenge hard to complete: defeat every Trainer. Once this is done, the final door will open, allowing the player to challenge the Empyreal Overlord.

Battle Coliseum
The Frontier Brain of the Battle Coliseum is Coliseum Star ???

Battle Speedway
The Frontier Brain of the Battle Speedway is Speedway Champion ???

Battle Labyrinth
The Frontier Brain of the Battle Labyrinth is Labyrinth Keeper ???

Battle Circus
The Frontier Brain of the Battle Circus is Circus Ringmaster ???

Battle Empyreal
The Frontier Brain of the Battle Empyreal and overseer of the entire Frontier is Empyreal Overlord ???