The strongest trainer with champion level.

Pewter gym leader and new rival

In pewter city, ash have samurai contact number with his three pokemon arrived at some place where he found a man.

???: sorry kid but you just stepped on my merchandise?
Ash: merchandise?
???:  i'm selling this rock as a merchandise. You want to go defeating the gym leader?
Ash: why sure. Because i wanna be a pokemon master by get 8 badge.
???: you should give up kid, the gym leader here using rock type pokemon. You don't have grass or water type pokemon. He is strong.

But ash didn't listen to him and go to the gym. With the gym are full of rock stage with a kid sitting at the boulder.

Brock: are you challenger?
Ash: yeah, i'm here for my gym badge.
Brock: i'm brock the gym leader of pewter city. I'm not to be underestimated.

Ash: well then let-
But then beedrill come out eager to battle which made him facepalmed.

Brock send out onix which shock ash. But beedrill keep battling with onix like hell.

Ash: beedrill used string shot.

Beedrill using string shot and tied onix. But onix used it's tail and one shot beedrill. Which causing ash lost his first battle so bad.

Brock: you only think about win over your pokemon. Leave.

Ash: tchhh.... i'm sorry beedrill.

Ash brought beedrill to pokemon center, let's just say spearow scolding beedrill even though it fully evolved.

Poketranslate on:
Spearow : idiot, you want to die quickly or something?
Charmander: you losing for first time huh?
Spearow: you are weak to rock type, a single splash of onix tail can kill you, you are fucking idiot.

Beedrill: i didn't take order from anyone. I'm better than anyone else.
Spearow: your ego the one holding you back. Stop being ego and just listen to ash. You really wanna try find rival right? Then listen and stop being angry for one minute.

Beedrill: tchh... fine but i still don't like two of you.

Poketranslate off:

With ash wondered how to defeat brock then the stranger appear and said.

Flint: i'm flint, i see you have struggling problem to defeat brock right?
Ash: yeah, how do i defeated him? I don't have pokemon that are grass or water type.
Flint: ever heard of tm move?
Ash: yeah, leaf told me but i don't know how.
Flint: let me help you.

With that ash send out his charmander,spearow and beedrill. Turn out beside water and grass, rock type also weak to steel type,fighting type and ground type move. Which ash are intrigued by this.

Over a intense training charmander learn metal claw and dig, beedrill learn brick break and rock smash and spearow learn steel wings. With that ash arrived back at the gym.

Flint: you see his parents are quite pissed of shit anyway.
Ash: really? How so?
Flint: brock is a oldest from 10 siblings, his dad left him to become the strongest pokemon trainer and his heartbroken mother lola also abandoned her own hild which made brock have to take care of the sibling and take the gym leader job.
Ash: i see, no wonder he really don't want to be underestimated.

Then ash return to the gym with him more improved than ever.

Brock: so you return huh?
Ash: yeah, i have improved enough to defeat you brock.
Brock: i see, then let's see how good you are anyway.

Then brock send out geodude.
Ash: spearow i choose you.

Spearow come out which made brock wondered why he send out flying type move?