Pokémon FireRed Tips

Best Team 1 (against brock)
When you are fighting gym leaders you need to try and hit the jackpot with your super effective attacks. Read below to find out which pokemon I personally recommend for each gym leader, and the elite four, plus your rival. You must read the other cheats that i have submitted too to learn the rest. This one is just brock.

Brock- Pewter City
Charmander/Charmeleon (must be level 13+ and must know the move metal claw which is super effective)
Squirtle/Wartortle (must be level 12+ so that the moves are powerful enough to knock out in one shot or level 13+ to know the move water gun
Bulbasaur/Ivysuar (must be level 10+ so that it learns vine whip but having it at level 15 teaches posionpowder and sleep powder which are a great addition)
Mankey (Must be level 7+ to learn the move low kick and preferably level 11 to learn karate chop, using low kick is better on onix though because he is heavier)
Butterfree- (Butterfree can use confusion which can cut dents in the pokemon being used from brock. An added extra of course comes from level 15 butterfree which can use the sleep powder move, putting the pokemon there to sleep)
Aginast brock these are the only suggestions i can give you, if you have other pokemon there attacks will not be very effective agianst the rock type pokemon.