The Rise of Overlord Pikachu
Pikachu padded along the dirt path with his trainer, Ash, and their friends Misty and Brock, heading towards Cerulean City. The warm afternoon sun cast golden rays over the landscape, but Pikachu's thoughts were far from peaceful. His time in the Heroes Chat Group had fundamentally changed him.
At first, he had found their chaotic nature overwhelming—Izuku pushing himself beyond limits, Issei making everything about girls, Naruto casually talking about planetary-level battles, and Ichigo… well, Ichigo had just gotten humiliated by Kaguya.
And then, in the middle of all this madness, they had assigned him a mission.
To conquer the Pokémon world.
At first, Pikachu thought they were joking. But no, they were dead serious. They believed in him. Not just as a cute little electric mouse, but as a force capable of dominating both Pokémon and humans alike. It was absurd. It was insane.
And yet… he kind of liked the idea.
There was something thrilling about it. The respect of his peers, the power to reshape the world—wasn't that what it meant to be the very best? Not just a champion, but a ruler?
Of course, the biggest downside of this revelation was that he had completely lost patience for Ash's stupidity.
"How did I ever tolerate this before?" Pikachu wondered as he listened to Ash enthusiastically rant about how he was going to catch every Pokémon and become the greatest Trainer of all time—despite barely understanding the basics of strategy.
"This idiot wouldn't last five seconds in the chat group."
That was why Pikachu had taken matters into his own paws. If Ash was going to stand beside him in the conquest of the world, he needed to be competent. No, he needed to be elite.
Under Pikachu's brutal training, Ash had already captured a Pidgey, a Caterpie, and a Nidoran. And thanks to his strict training regimen, they had all evolved—Pidgey into Pidgeotto, Caterpie into Metapod, and Nidoran into Nidorino.
But it wasn't enough.
"Three Pokémon are not an army." Pikachu mused. "I need more. Stronger. Faster. More disciplined."
His conquest required an army.
Just as he was contemplating what kinds of Pokémon to dominate—and whether he should start training humans as well—they stumbled upon a young scientist being attacked by a flock of Zubats.
The man was flailing wildly, his glasses nearly falling off his face as he swatted at the bloodthirsty bats.
"Aaaaahhh! SOMEBODY HELP ME!"
Pikachu rolled his eyes.
"Pathetic."
With an unimpressed flick of his tail, Pikachu unleashed a Thunder Shock.
A golden arc of electricity crackled through the air, instantly frying the entire flock of Zubats mid-flight. The bats screeched before collapsing in a heap, completely unconscious. The scientist blinked in shock, adjusting his glasses.
"You… you saved me!" he gasped. "That was incredible!"
Pikachu didn't even look at him. His mind was already elsewhere.
"Zubats, huh? A large swarm, fast and easily commanded… they could be useful."
Perhaps he should conquer the caves first.
Yes. That would be a good start.
The Caves shall be mine.
As the group entered the cave, the dim glow of luminescent fungi cast an eerie but mesmerizing light throughout the tunnels. Paras scuttled around, diligently planting their mushrooms into the cavern walls, their spores shimmering faintly. However, one sight caught their attention—a Sandshrew, exhausted and curled up in a dry patch, clearly struggling under the artificial lights installed in the cave.
Misty frowned, arms crossed. "Why would someone mess with the lights in the cave like this?"
The eccentric scientist they had saved, Seymour, dramatically brushed off his lab coat and struck a pose. "Ah, dear travelers, a mystery unfolds, the cave disrupted, the balance controlled! But listen well, my curious friends, to the truth of the stone and the power it lends!"
Ash blinked. "Uh… what?"
Pikachu internally sighed. Why must I suffer this fool?
Brock, ever the responsible one, cleared his throat. "I think he's saying he has a theory about the Moon Stone."
Seymour nodded eagerly. "Indeed, indeed! The Moon Stone—no mere rock—has traveled from space, a celestial dock! It holds a power vast and great, evolving Pokémon, changing fate!"
Misty raised an eyebrow. "That's… a pretty original theory."
Ash, now a little nervous, scratched the back of his head. "Yeah! Totally! That makes complete sense, Seymour!"
Before the scientist could start another poetic tangent, a Clefairy suddenly hopped past them, clutching a small rock in its tiny hands.
Ash's instincts kicked in. "A Clefairy! This is my chance!"
He reached for a Poké Ball, but Seymour quickly jumped between him and the pink Pokémon. "Wait! No, dear boy, let Clefairy be! To capture it now—oh, a tragedy!"
Clefairy, oblivious to the conversation, suddenly let out a panicked cry as it disappeared down a side tunnel. The group rushed forward just in time to see a looming shadow over Clefairy—a feline silhouette with curled whiskers.
Ash's eyes narrowed. "That's Meowth!"
Sure enough, a familiar voice echoed through the cavern.
"Prepare for trouble!"
"And make it double!"
Team Rocket stepped into the light, striking their usual flamboyant poses.
Pikachu sighed. They never change.
Jessie grinned, tossing back her hair. "Well, well, look who it is. If it isn't the twerp brigade!"
James smirked, cradling a Moon Stone fragment. "We heard you were in town, Ashy-boy. But unfortunately for you, we got to the real prize first!"
Meowth sharpened his claws. "This here Moon Stone is gonna make our Pokémon unstoppable!"
Ash clenched his fists. "You can't just take the Moon Stone! It belongs to the Pokémon of this cave!"
Jessie snickered. "Jealous much?"
James smirked. "It's only natural. After all, you'll never be as great as us!"
Ash scowled. "I'd rather lose a hundred times than ever join Team Rocket!"
Jessie shrugged. "Suit yourself. But that means we'll just have to crush you!"
With a dramatic flourish, Team Rocket sent out Ekans and Koffing.
Ash, fired up, grabbed a Poké Ball. "Butterfree, I choose you!"
Brock followed up. "Geodude, let's go!"
As the Pokémon squared off, Pikachu watched intently from the sidelines. He had faith in his subordinate, Butterfree, to handle these small fry. However, his gaze lingered on Team Rocket.
They're weak… but their organization is powerful.
His mission from the chat group was clear: Destroy or Subjugate Team Rocket.
If his goal was to conquer the world, outright destruction seemed like a waste. Subjugation was the better option. The organization had resources, manpower, and influence. All things he could use.
But before he could take them over…
He had to conquer Mt. Moon first.
As the battle between Ash and Team Rocket raged on in the background, Pikachu had his own mission. He closed his eyes and focused, sending out a chakra sonar pulse that spread through the mountain's tunnels. The invisible waves traveled far and wide, mapping the intricate network of caverns and revealing the presence of countless Pokémon.
He could see flocks of Zubat hanging from the ceilings, Geodude lazily resting near rock formations, and Paras tending to their mushrooms. But none of them were his target.
No, he was searching for the boss of this mountain.
Every area had a ruler—a Pokémon strong enough to dominate its domain. In the Viridian Forest, Pikachu had been too weak to challenge the Bug King, so he had avoided it. But that was two weeks ago. Since then, he had been training under the chat group's guidance and had grown far stronger.
He had gained chakra, though it was still a small amount.
With Food Honor, he could eat more and absorb nutrients efficiently, making his muscles denser while still maintaining his small, adorable form.
He had a Lightning Enhancer Crystal embedded on his forehead, dramatically boosting his electrical powers and making him nearly immune to lightning-based attacks.
On top of that, he had metallic gauntlets that materialized when needed, complete with razor-sharp claws capable of slicing through solid steel.
His tail now had a spear tip, making it a deadly weapon in close combat.
With these upgrades, he was ready.
Pikachu's sonar finally detected something.
A powerful presence.
An immense Pokémon, radiating strength even in its slumber.
There you are.
Without hesitation, Pikachu dashed through the cavern, moving like a yellow blur. His enhanced agility allowed him to bounce off the walls, avoiding smaller Pokémon as he navigated the tunnels.
After a few minutes, he arrived in a massive underground chamber.
Pikachu stood at the entrance of a massive underground battlefield, his sharp gaze scanning the numerous Pokémon that resided in the domain. The cavern was alive with movement—Onix slithering through tunnels, Zubat fluttering in clusters, Geodude resting near rock formations, and even a few Rhyhorn stomping about. However, none of them mattered.
His target lay in the center of the chamber.
An Onix unlike any other.
The beast was at least five times the size of a normal Onix, its massive, segmented body composed of midnight-black stone that gleamed under the dim cavern light. Deep battle scars lined its body, testaments to the countless battles it had fought and survived.
A Pokémon like this would have been impossible for a normal Pikachu to defeat.
But Pikachu was not normal.
With chakra, he was no longer bound by genetics.
With Life Erasure, he moved unseen and unfelt, his presence completely masked.
However, he would not use these tricks to win.
Surprise attacks would make victory easier, but he sought recognition. If he were to take control of this domain, he needed a fair duel. A king must defeat another king in battle.
So, he announced his presence.
Pikachu released his aura like an ocean, a sheer pressure of dominance sweeping through the cavern. The smaller Pokémon collapsed under the invisible weight of his will, their bodies trembling, unable to stand against the overwhelming force.
Only one remained unaffected.
The boss Onix.
The giant snake lifted its massive head, its glowing red eyes locking onto Pikachu. Its gaze held a mix of curiosity and irritation.
"What do you want, little mouse?"
The voice was a deep rumble, vibrating through the cave.
"If you don't have a plausible reason for this insult, I will kill you for your disrespect."
Pikachu met the Onix's gaze, unfazed.
"I challenge you to a duel." His voice was calm but resolute. "I want you to become my subordinate. I will take over this territory."
A tense silence followed.
Then, the Onix scoffed.
"Delusional."
The instant the words left its mouth, Onix's entire body tensed.
And then—
A deafening screech tore through the cavern.
The sound blasted outward in all directions, shaking the very earth and reverberating through the tunnels like a tidal wave of agony. Pikachu's sharp ears twitched as the sound rattled his brain, an ability designed to disorient and lower an opponent's physical defense significantly.
A normal Pokémon would have been crippled on the spot.
But Pikachu was not normal.
Before the sound could affect him, a layer of chakra wrapped around his body, isolating him from the move's effects. The screech faded into nothing before it could weaken him.
The moment the attack ended, Pikachu vanished.
He reappeared instantly—a yellow blur, rocketing toward Onix's head.
"Quick Attack!"
Pikachu's speed skyrocketed, turning him into an unstoppable projectile. In a blink, he closed the distance, his tail gleaming metallic silver.
"Iron Tail!"
The spear-headed tail smashed into Onix's skull with a tremendous impact. A visible shockwave rippled through the air as the attack landed, sending small rocks flying. The massive Onix grunted, its colossal body shaking, but it didn't go down.
Pikachu clicked his tongue.
Tough bastard.
The Onix felt the attack, but instead of retreating, it let out a low growl before activating its own ability.
"Iron Coat."
Its black stone skin began to shine with a metallic sheen, its already insane durability skyrocketing to even greater heights.
Then, it counterattacked.
"Earth Bullet!"
Chunks of solid rock tore out of the cavern walls, rapidly forming into high-speed projectiles that rained down toward Pikachu like a meteor shower.
Pikachu's eyes gleamed with excitement.
He wasn't just fighting a strong Pokémon—
He was fighting a worthy opponent.
With effortless grace, he began weaving through the attacks, his small form dancing through the storm of rock projectiles. The Earth Bullets whizzed past him, narrowly missing his body as he moved like lightning itself.
Each dodge brought a wider grin to his face.
This was fun.
Onix might be stronger and more durable, but Pikachu had speed and technique on his side.