The Cinnabar Gym defied conventional architecture.
Built into the volcano itself, the facility used geological features that no construction could replicate. The arena occupied a volcanic crater, natural amphitheater that the island had shaped across millennia, adapted for competitive battling through engineering that bordered on insane.
Lava pools surrounded the battlefield proper. Protective barriers separated audience from hazards, but the heat reached everyone regardless. Volcanic vents released constant thermal energy. The air itself seemed designed to favor Fire-types.
Fifty thousand spectators filled the crater's terraced seating. Post-eruption publicity had guaranteed maximum attendance, everyone wanted to see the young trainer who had helped save their island face their Gym Leader in her element.
Mei entered like flame given human form.
Red hair flowing behind her. Presence that radiated heat beyond simple temperature. Confidence that decades of Fire-type mastery had earned.
"Sasuke Uchiha." Her voice carried across the volcanic arena. "Welcome to my domain."
She gestured at the lava pools, the vents, the impossible heat.
"This is where Fire reigns supreme. Where even Water-types must bow to flame."
Intimidation tactic. Environmental advantage displayed openly.
Sasuke stood at his position, composure intact despite heat that made every breath feel like challenge.
"I'm ready."
The arena inspection confirmed what observation suggested.
Incredibly hot. Even with cooling systems that the facility maintained, temperature exceeded what normal gyms allowed. The volcanic vents weren't decorative, they released actual geothermal energy, constantly refreshing the heat that protective barriers couldn't entirely contain.
Lava bubbled in pools positioned around the battlefield. Not static scenery, active geological features that added genuine danger to competition.
"Any Pokémon in lava automatically faints," the referee explained. "Trainers must remain behind designated barriers at all times. Emergency evacuation protocols are active throughout the facility."
"Safety paramount," Mei added. "The volcano is unpredictable. If monitors detect concerning activity, the match ends immediately."
"Understood," Sasuke confirmed.
"This is an official Pokémon League gym battle! Standard format applies!"
The referee's announcement echoed across the volcanic amphitheater.
"Trainers, reveal your Pokémon!"
"Magmortar!"
The Blast Pokémon materialized with comfort that the volcanic environment provided. Its cannon arms radiated heat that added to already intense atmosphere. The Fire-type that felt most at home in conditions that would kill most species.
"Blastoise!"
The Shellfish Pokémon emerged with presence that immediately contrasted. Water energy surrounded its form, shell providing protection that the hostile environment demanded.
Type advantage favored Sasuke.
Environmental advantage favored Mei absolutely.
"Battle begin!"
"Sunny Day!"
Mei's opening move maximized everything the arena already provided.
Light intensified beyond what volcanic heat had established. The artificial sun that the technique created boosted Fire-type moves while simultaneously weakening Water attacks.
"Smart opening," Kiyomi observed. "She's not relying on environment alone. She's enhancing it."
Blastoise showed immediate distress.
The heat that training had prepared it for now exceeded those parameters. Steam rose from its shell. Water energy that should have surrounded its form began evaporating before it could manifest fully.
"Must adapt quickly," Sasuke calculated.
"Withdraw!"
Blastoise retreated into its shell, not defensive maneuver against attack, but temperature regulation that the massive carapace could provide. Internal cooling systems that evolution had developed stabilized conditions that external environment had overwhelmed.
"That won't save you forever!" Mei called. "Magmortar! Prepare Fire Blast!"
Blastoise emerged before the attack could launch.
"Rain Dance!"
The counter-weather move created precipitation that Sunny Day's sun should have prevented. Water versus Fire extended to atmospheric control, the battle for field dominance that would determine everything else.
Rain fell.
For a moment, the volcanic arena experienced something it had never known, precipitation that cooled, that supported Water-types, that challenged Fire's absolute dominance.
"Interesting," Mei acknowledged. "But temporary."
"Flamethrower!"
Magmortar's attack wasn't aimed at Blastoise. It was aimed upward, at the rain itself.
Steam erupted.
Every droplet that the Rain Dance produced evaporated on contact with flames that exceeded their cooling capacity. The arena filled with obscuring vapor that vision couldn't penetrate.
"Visibility zero," Sasuke registered.
"Exactly how I like it." Mei's voice came through steam without clear location. "Magmortar senses heat. It can track your Blastoise through any steam, any smoke, any obscuring condition."
"Can't see," Kasumi said with concern.
"He can hear," Miyuki countered. "And feel."
Sound became Sasuke's guide.
Magmortar's movements created distinctive patterns, footsteps that volcanic terrain amplified, cannon arms that hummed with building energy.
"Rapid Spin!"
Blastoise's rotation generated force that pushed steam aside. The technique wasn't attack, it was environmental control that created visibility through motion.
Opening appeared.
Magmortar's position revealed itself, the Fire-type unable to relocate fast enough to avoid detection.
"Hydro Pump!"
The signature move launched with power that training had enhanced. Massive water pressure that even Sunny Day's weakening effect couldn't entirely diminish.
Direct hit.
Magmortar flew backward, the force of Water-type super effectiveness sending it toward lava pools that rimmed the arena.
"No!"
Mei's concern was genuine. The boundary between battlefield and fatal hazard was narrow. Magmortar stopped barely feet from lava that would have ended the match immediately.
"Close," the referee observed. "Match continues."
"No more playing."
Mei's expression shifted. The competitive warmth that had characterized her demeanor gave way to intensity that championship battles demanded.
"Primal Reversion!"
Magmortar transformed.
The Fire-type's form expanded into something prehistoric, ancient volcanic beast that had dominated before modern Pokémon existed. Its cannon arms became geological features rather than biological limbs. The heat it generated exceeded what contemporary Magmortar could produce.
And near the lava pools, its natural environment, the Primal form began absorbing energy directly from the molten rock.
"Lava empowerment," Kiyomi realized. "The arena isn't just advantage. It's power source."
"Primal Reversion!"
Sasuke's counter matched transformation with transformation.
Mega Blastoise shifted into its own ancient form, sea guardian that had protected oceanic territories before human civilization existed. Its shell evolved into something more like fortress than carapace. The cannons that defined its species multiplied, triple barrels replacing the singular weapons of modern evolution.
Primal Mega Blastoise.
Water pressure that could have carved canyons. Defensive capabilities that had survived geological epochs. The ancient opposite of everything Primal Magmortar represented.
"Fire and Water," Mei declared. "Elements that have warred since the world began."
"Elements that must coexist," Sasuke countered. "Balance that neither can destroy."
"Philosophy in battle." Mei's smile held respect. "Your brother did the same thing. Let's see if you can back it up."
Primal Magmortar gathered volcanic energy from the arena itself, lava pools feeding power that other environments couldn't provide.
Primal Mega Blastoise drew moisture from every source available, steam, precipitation, the ocean air that surrounded the volcanic island.
Elemental war.
The real battle was about to begin.