Brock

Brock was the first to break the silence, his voice low and even. "I've chosen my Pokémon. Go, Rhyperior!" The words were barely out of his mouth when he tossed a Poké Ball into the air.

As the Poké Ball soared through the air, it burst open in a flash of white light, releasing Rhyperior into the battlefield. The massive Ground-type Pokémon materialized in a cloud of smoke, its imposing physique and rugged, rocky hide a testament to its incredible strength. The ground shook beneath its feet as it landed, sending tiny tremors through the battlefield. Rhyperior's piercing gaze locked onto Ash, its eyes blazing with a fierce inner light as it let out a thunderous roar, the sound echoing off the gym's stone walls.

Ash's eyes widened as he took in the enormity of the Pokémon before him, his grip on Charizard's Poké Ball tightening reflexively.

"Charizard I chose you" Ash said as the fire Dragon appeared on the field ready to battle.

As the Poké Ball's light faded, Charizard materialized on the battlefield, its magnificent wings unfolding from its back like a cascade of ember-tipped splendor. The air seemed to shimmer with heat as the fire dragon's eyes blazed with inner fire, its gaze locking onto Rhyperior with an unyielding intensity. The ground beneath Charizard's feet seemed to glow with a faint, warm light, as if the very earth itself was being infused with the fire dragon's radiance. A low, rumbling growl emanated from Charizard's throat, a sound that vibrated through the air and seemed to vibrate the very foundations of the gym.

The air was electric with tension as the two Pokémon clashed, their movements a blur of speed and fury. Charizard's flames danced across the battlefield, casting flickering shadows on the walls as it breathed a stream of fire that Rhyperior barely sidestepped. The Ground-type Pokémon countered with a crushing Stone Edge, its massive fists glowing with a faint, earthy energy as it slammed them into the ground, sending rocks and pebbles flying in all directions. Charizard leapt into the air, its wings beating fiercely as it narrowly avoided the attack, but Rhyperior was relentless, pursuing the fire dragon with a relentless onslaught of Hammer Arm and Earthquake.

As Rhyperior's Rock Wrecker slammed into Charizard's chest, the air seemed to shudder with the **** of the impact. The sound of the attack was like thunder, a deafening crash that sent shockwaves through the battlefield. Charizard's wings beat wildly, its claws scrabbling at the air as it stumbled backward, its eyes glazing over with a mixture of pain and disorientation. The fire that had once danced in its eyes with such fierce intensity was now flickering, guttering like a candle flame in a storm.

Ash's face was a mask of horror, his eyes wide with shock and despair as he watched his beloved Charizard crumple to the ground.

"Charizard is unable to battle Rhyperior is the winner and the winner of the match is Brock" Forest said as Rhyperior let out a proud roar as Brock left the room to get the Suit of the Pokemon he wanted Ash to be.

As Forest's words hung in the air like a **** sentence, Ash's face contorted in a mixture of despair and desperation. His eyes, wide with fear, darted towards the doorway where Brock had disappeared, his mind racing with the implications of his loss. The sound of Rhyperior's triumphant roar still echoed through the battlefield, a harsh reminder of his defeat. The ground beneath his feet seemed to tilt, as if the very foundations of his world were shifting. Ash's gaze returned to Charizard, his loyal partner lying motionless on the ground, a pang of guilt and worry piercing his heart.

Ash returned Charizard to it's pokeball and then turned towards Forest and said " Please take care of him for me since I am not there anymore to do it" as he Put Charizard's Pokeball into Forest hand as he accepted his fate of becoming whatever Pokemon Brock wanted.

Forest's eyes widened in a mixture of sadness and understanding as Ash handed over Charizard's Poké Ball. His hands closed gently around the ball, a silent promise to care for the Pokémon that had been by Ash's side for so long. The gym leader's expression was a mask of solemnity, his voice barely above a whisper as he replied, "I will, Ash. I promise you, Charizard will be well taken care of."

Brock came back with a Aerodactyl suit in his hands as he walked over to the two.

Brock's eyes gleamed with an unsettling intensity as he approached Ash, the Aerodactyl suit cradled in his hands like a prize. The leather creaked softly as he held it up, the dim light of the gym casting eerie shadows on its surface. Ash's gaze was drawn to the suit, he smiled at least he would be a strong pokemon. The Aerodactyl suit seemed to loom over him, its presence suffocating, as Brock's voice dripped with an unsettling enthusiasm. "This is the suit of a Pokémon I've always admired for its speed and ferocity. You'll make a fine Aerodactyl, Ash."

Ash took a deep breath as he striped down to his underwear and then took the Aerodactyl Suit into his hands.

As his fingers closed around the Aerodactyl suit, Ash felt a shiver run down his spine. The leather was cool to the touch, its surface embossed with intricate, scaly patterns that seemed to shift and ripple in the dim light of the gym. The air was heavy with the scent of old leather and something else, something primal and earthy that spoke to a deep, primitive part of Ash's psyche. He turned the suit over in his hands, feeling the weight of it, the solidity of the material. It was heavy, substantial, and seemed to hum with a power all its own.

with that Ash put his feet and legs into the suit surprised how warm it is , then he put his arms and hands into the Wing hands, and then lastly he pulled the headpiece over his head sealing his fate.

As the headpiece settled over his head, Ash felt a sudden, disorienting rush of sensations. The warm leather enveloped his face, molding to his features with an eerie intimacy. The scent of old leather and primal earthiness intensified, filling his nostrils and making his head spin. His vision blurred, and for a moment, he was unable to see anything but a swirling vortex of colors. he then felt his head change the shape of an Aerodactyl as his eyes moved to the side of his head as his eyes turned into a triangle shape, before his iris turned Blood Red, as his Pupils turned into slits, meanwhile his ears shrunk out of existence leaving behind 2 holes, as 2 horns expanded from the back of his head as his mouth expanded into a big muzzle with a bit of an overhang as his teeth transformed into razor sharp fangs.

Next his his arms lost a lot of width but gained a bit of length as his ring finger and pinky fused together before growing in lenght as the became the outer parts of his winarms, while his three fingers grew into sharp claws,as the Membranes fused with his arms.

next he felt his organs rearange and change as his vocal coards adjusted to those of an Aerodactyl, and with these changes he could only speak pokemon speach now, meanwhile a small horn grew from his back as the tail fused with his tailbone.

lastly his legs shrunk down in size but his upper legs gained a good amount of Muscle Mass while his toes fused into 2 as a 3rd one came out of his heels as they ended in razor sharp claws like his fingers as the changes were finished Ash's mind was filled with Primal instincts of an Aerodactyl, and Complete loyalty towards Brock and his family as the suit fused with his body.

As the transformation completed, Ash's vision slowly cleared, and he found himself gazing out at the dimly lit gym with a newfound sense of clarity. The colors seemed more vibrant, the shadows more defined, and the air thick with the scent of damp earth and ozone. His ears, now nothing more than two small holes on the sides of his head, picked up the faint sound of Brock's breathing, steady and calm. The quiet reverberations seemed to vibrate through his entire body, making his skin tingle.

Ash's gaze settled on Brock, his eyes locking onto his new master with an unblinking stare, before his muzzle grew into a smile feeling the power instincts and Loyalty well up in him "I see someone is enjoying his new self" Brock said as he petted Ash's head who let out a pur.

As Brock's fingers ruffled the soft, leathery hide on Ash's skull, a low rumble began to build in his chest, the vibrations thrumming through his entire body. His tail, now a long, slender extension of his spine, twitched with excitement, the razor-sharp claw at its tip scraping softly against the stone floor. The purr deepened, growing louder and more resonant, as Ash's eyes seemed to gleam with an inner light, his pupils contracting to slits as he basked in the gentle touch.

Brock's smile grew wider, his eyes crinkling at the corners as he gazed at the creature that had once been his friend and rival. " I see you're getting used to your new form, Ash," he said, his voice filled with warmth and approval. Ash's eyes glowed with a fierce pride as he nodded his head, the movement causing his horns to brush against Brock's hand.

Brock continued to stroke Ash's head, the motion soothing and calming. Ash closed his eyes, his body relaxing under the gentle touch. He could feel the bond between them growing stronger, the connection deepening as he surrendered himself to his new identity.

"Now, Ash, as my newest Pokémon, I have a special task for you," Brock said, his voice taking on a more serious tone.

Brock's words hung in the air, his gaze intensifying as he studied Ash's reaction. The Aerodactyl's eyes, still closed in relaxation, fluttered open, the vertical pupils snapping into focus. Ash's head tilted slightly, his ears - now just small holes on the sides of his skull - twitching as if straining to catch every nuance of Brock's tone. The purring, which had grown softer, ceased altogether, replaced by an expectant silence.

The air in the gym seemed to thicken, the ozone-scented atmosphere charged with anticipation. Brock's hand, still resting on Ash's head, applied gentle pressure, as if urging his new Pokémon to attention.