Mauville Racing Grounds' facility was enormous indeed; while the office space had little signage due to its size being on the smaller side, the property where the action took place, just outside the city proper, was enormous. Luckily, Josh had experienced staff who knew the facility well, and signage that could guide challengers to the correct location. The voice of ANDREW WEISS, Josh's scheduler, echoed over the Gym's loudspeakers:

"Challenger Adelaide Whiteley , please report to the Main Sector. Challenger Whiteley, to the Main Sector. Thank you!"

Provided Adelaide followed the ample signage to get to the Main Sector, where the facility's battle courts were located, she would find Josh removing the saddle from Meteos, an intimidating-looking Aerodactyl that looked downright dangerous to ride due to the species' extreme speed. "Challenger Whiteley?" Josh asked. "Gym Leader Josh Devlin. Great to meet you," he greeted the lady, the vast battleground behind him. While most Gyms' battle courts had some variance to how large they were, Mauville's was notable for being extremely large; it was triple regulation size, and it was wide open, with plenty of channels for aquatic Pokémon to swim. Pokémon had plenty of room to run and nowhere to hide, playing into the ultrafast Pokémon on Josh's Gym squad and giving them quite the home field advantage.

The Gym Leader directed the challenger toward the west side of the triple-sized court, toward the Trainer's Box on the challenger's side. "According to your application, this will be a two-Pokémon Doubles match. The first side to incapacitate both their opponent's Pokémon will be the winner. There will be a seven-minute time limit. Once time expires, the side with more Pokémon standing will be the winner. Ties will be broken by sudden death. Good luck to you; you'll need it."

Once the two trainers were positioned, the small gallery cheered, primarily for Josh, as the platforms rose to a height of roughly ten feet. The Gym Leader pointed toward the circular pool surrounding the inner ring of the battle court, the Aerodactyl ready to do battle. He hurled a second Poké Ball toward the pool, a vicious-looking Sharpedo appearing and thrashing in the water as if to goad Adelaide into giving it everything she had. "Now, bring forth your Pokémon and ponder your opening moves. I can assure you it will be the only decision you will have time to ponder," Josh taunted as the move timer counted down on the scoreboard clearly visible to the challenger.