This is the first fanfiction I've uploaded, I know it's not that great, but I wanted to give it a shot. I will also give the Pokemon moves that they may not have known (for example, Red's Pika will know Brick Break).
"What Pokemon will these two contestants choose?" an announcer yelled loudly, as everyone cheered.
Two trainers were on opposite sides of the battlefield. To the left was a black haired trainer with a hat. The person on the opposite side looked a bit similar to him, only much cooler.
"So, Ash, which Pokemon will you choose?" he asked.
Ash threw a Pokeball.
"Tauros, I choose YOU!" he yelled out. "Do your worst, Red! I won't go easy on you!"
A bull Pokemon came out of a ball capsule in front of Ash.
"Sure thing!" Red replied, "Poli, you're up!"
A tadpole-like Pokemon with a swirl in the middle of its body came out in front of Red.
"Let the battle BEGIN!"
"Tauros, use Horn Attack!" Ash yelled.
His Pokemon charged at Red's Poli. Poli was just standing there, likely not taking it seriously. When Tauros was inches away from it, the Poliwrath grabbed a hold of its horns, holding it back.
"Tauros!" called Ash.
"Do it, Poli!" Red called.
Within seconds, Ash's chosen Pokemon was sleeping. Poli stepped closer to it and gripped it tight.
Ash looked angry. "Tauros, don't fall asleep on me now!"
But Tauros wasn't moving at all.
"Poli, now!" Red said, excitedly.
'This is bad.' Ash thought. He held out a Poke Ball and tried to return it, but the beam never reached Tauros, because at that moment, Poli jumped in the air, still lifting it. Ash kept trying to recall it, but failed miserably. Poli then came crashing down on the ground on top of Tauros. The bull Pokemon had swirly eyes, meaning…
"Tauros is unable to battle! The winner is Poliwrath!" the announcer said.
The crowd was silent for a few seconds, and then broke into a loud cheer.
"Is that all ya got?" Red taunted.
"Nope. I'm just getting warmed up!" Ash said, returning Tauros.
"Funny. You said you wouldn't go easy on me." Red said with a smirk.
Ash then sent out a tall gecko-like Pokemon. "Sceptile, I choose YOU!" he yelled.
"And Ash sends out Sceptile!" the announcer said.
"Sceptile was a good choice. It's fast, and has the advantage." Brock said from the sidelines.
"You can do it Ash!" said Dawn, completely ignoring him.
"Sceptile, Bullet Seed!" Ash said.
Sceptile shot seeds from its mouth at the Poliwrath, who clapped its hands before dodging.
"That didn't work. Leaf Blade!" Ash screamed.
But instead of Leaf Blade, it used the same attack from before.
Ash frowned. "Sceptile, listen to me!"
Red smiled at the fact that Poli's technique had Ash on edge. "Ice Beam."
A beam of ice came out of the swirl on its belly and froze Sceptile completely.
"Hang in there, Sceptile, just use solar Beam to break out!" Ash yelled.
Poli ran towards it with a gloved hand and punched through the ice, shattering it and sending Sceptile back. The ice shards that shattered fell on Sceptile, taking it down. Just like Tauros before, it had swirly eyes.
"Sceptile is unable to battle, Poli wins!" the announcer said again.
Ash returned Sceptile and threw another Poke Ball.
"Totodile, I choose YOU!" Ash yelled.
A small blue dinosaur came out. Ash looked more determined than ever.
"Good choice. Water and ice type moves won't affect it much at all." Brock said.
"Show that Poliwrath who's boss!" Dawn said, ignoring him again.
"Alright, Poli, use that technique we've worked on!" Red said.
Poli beat on its belly with both of its hands multiple times.
"Totodile, I don't know what it's doing, but it doesn't matter. Use Bite!" Ash yelled.
Totodile ran to Poli with its jaws wide open. Poli stopped beating its belly and started dancing. Totodile came to a halt and also started dancing. Totodile seemed to be taking this too seriously. The look on his face seemed to be saying, "I will outperform you!" Some of the crowd onlookers were laughing.
Ash yelled at Totodile with a stern look on its face. "Hey, this isn't the time for that, Totodile!"
Right after he said that, it started to rain. Poli stopped dancing, but Totodile kept going. After a while, Totodile opened its mouth at Poli, as if to say, "Hah, you lose!"
"Waterfall!" Red said.
"You too!" Ash said.
Waterfall-like attacks formed in front of them. The two of them collided with each other, but Poli's broke through Totodile's. Totodile was sent flying, and crashed into the floor. It had swirly eyes, too."
"Totodile is unable to battle, the winner is Poli! Ash is down by three Pokemon, so that means we'll take a short break." The announcer said.
"Who is that kid?" a spectator asked.
"I don't know, but Ash has no chance." Another one replied.
The two of them recalled their Pokemon. Ash came to his friends.
"That guy is tough." Ash said.
"Agreed. But I think you know all of Poli's techniques by now." Dawn said.
"Let's not forget, Poliwrath isn't his only Pokemon." Brock said, owning her.
The three of them looked up to see Red…flying (?) in front of Ash.
"Hey, don't feel bad. Losing is part of growing up! Keep that in mind, and you can be a decent trainer." Red said.
Ash became angry. "What did you say?"
Brock held him back. "Easy, Ash, he didn't mean to get you all riled up."
"As the Kanto Champion, I feel obliged to give newbie trainers advice." Red replied.
The three were shocked. "You're the Kanto Champion?" they all asked.
"Yeah!" Red said.
"I'll keep that in mind, Red. But keep THIS in mind: This battle isn't over yet!" Ash countered.
"Will the two contestants please come back on stage?" the announcer said.
Ash ran towards his side of the battlefield.
"Alright, Aero, let's head back!" Red said, before flying to his side of the field.
"This break is over, and now without further ado, let's continue this!"
TBC