How to defeat brock?

Question

I have six Pokemon and With my last five Pokemon I failed defeating brock. How THE HECK WILL A FINALLY BE ABLE TO DEFEAT BROCK?

IfYourPLANFAILSYouShallDie

Comments

What game are you playing?

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It’s tagged red, so I presume gen-1

Answer 1

If you chose either Squirtle or Bulbasaur as your starter in Red, Bubble or Vine Whip will annihilate Brock's Pokémon.

If you chose Charmander however, and choose not to abuse items or overlevel, the majority of Pokémon available at this stage of the game comprise of moves that Rock types resist, such as Flying, Poison, and mostly Normal. Fortunately, it's worth noting that Brock's Team has a poor movepool too - Geodude only gets Tackle and Defense Curl, when the latter isn't meaningful when most of your Physical moves won't deal much damage to it anyways. Onix meanwhile gets Tackle, Screech, which you can easily switch out from, and Bide, which can be abused quite effectively. This allows you to freely use any Pokémon that would otherwise be weak to Rock moves, as they would be in Fr/Lg. Regardless, here are a few Pokémon I would suggest to use:

Charmander - Though an obvious pick, Charmander's STAB Ember works off Geodude and Onix's far lower Special stat, allowing it to deal more damage than most other Pokémon. It's likely your highest-leveled Pokémon at this stage of the game too.

Nidoran-M - Horn Attack is the strongest BP move at this point of the game, accessible at Level 8. Nidoran's Leer can lower Onix's Defense without much opposition, though it's not as effective on Geodude. Nidoran-M also gets Poison Sting at Level 14, which can attempt to fish out Poison. Nidoran-M is preferred over Nidoran-F, as the latter gets Scratch, not Horn Attack.

Butterfree - If you really want to use a Butterfree, although it's not very good after this gym, it gets Confusion at Level 12, which is a Special move Rock/Ground types do not resist. Therefore, it tears through the Rock Gym like no other Pokémon, besides the other two starters.

Beyond abusing inaccuracy with Pidgey's Sand Attack or possibly using Weedle's Poison Sting in an attempt to Poison the opponent's Pokémon, these are likely the only Pokémon worth using for Brock. These recommendations should get you past your first true obstacle in a Pokémon game, and uh, please don't kill me.

Comments

Good answer, but I think you'll still die eventually.

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Charmander doesn't have any hard battles.  Charmeleon does.

Answer 2

Brock's Onix is level 14, and it resists normal, fire, electric, poison, flying, and rock. The only Pokemon that is obtainable before Brock (if you picked Charmander) and learns an attack by level 14 that isn't one of those types is Butterfree, which learns confusion at level 12. Unfortunately, Butterfree has pretty low stats and doesn't learn any STAB moves, so if you level up a Butterfree and use it to defeat Brock, you should probably stop using it immediately afterward.

Your next best option is to raise a NidoranF or NidoranM until it learns poison sting at level 14, and keep spamming poison sting until it poisons his Pokemon. This is more annoying, but you end up with a Pokemon that stays useful after you defeat Brock.

Answer 3

If you're playing Fire Red or Leaf Green, get a few Mankeys to fight him.
If you're in Red, get a few mankeys again.
If you're playing Blue, you're cooked. Try restarting and picking Bulbasaur or Squirtle because they both have super effective damage, but Bulbasaur is better because the next gym is the water gym, which is weak to grass. And if you choose bulbasaur could use the walk through walls glitch to go and get into Digglet's cave and go onto route six, which has Bellsprout, a grass poison type like Bulbasaur, which will help for the first 3 gyms because it's super effective for the first 2 gyms and the 3rd gym is not very effective against grass.
If you're playing Yellow, you're cooked. All I can say. I spent 30 minutes trying to figure this out.
You're probably not playing Gold, Silver, Crystal, or Heart Gold and Soul Silver since you're having problems beating Brock.
And finally, if you play Let's Go Pikachu or Eevee, you can get Oddish in Let's Go Pikachu on route 1, but not in Let's Go Eevee buuut in Let's Go Eevee you can find Bellspout. That's it, I just spent 2 and a half hours getting this info for no good reason. Peace out.
Edit: I just realized that you're playing Pokémon Red... I wasted so much time.

Comments

You can't catch Mankey before Brock in Red, but you can in Yellow. NidoranF and NidoranM also learn double kick much earlier in Yellow than RB.

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Additionally, in Red/Blue, Mankey's only reliable STAB is Submission through TM.