Gym Leader #1 Brock - Pokemon FireRed and LeafGreen

Gym Leaader #1 Brock - Rock

Brock has two Pokemon; Geodude & Onix. His gym is extremely simple, you just need to walk up to him, you don't even have to battle the trainers.

Geodude

Level: 12

Types: Rock/Ground

Ability: Rock Head

Attacks: Tackle & Defense Curl

Weakness: Ice, Ground, Fighting, Water & Grass

Strategy: If you didn't pick Bulbasaur or Squirtle, you might have some trouble, you can catch a Mankey or Nidoran on nearby routes if you need the fighting-type advantage.

Onix

Level: 14
Types: Rock/Ground
Ability: Rock Head
Attacks: Tackle, Bind & Rock Tomb
Weakness: Ice, Ground, Fighting, Water & Grass
Strategy: Same with Onix, Onix will use Bind, which is a non-attacking move by with it takes damages, after two turns it will deal the damage back twice as hard.

Once you defeat Brock, you will get TM 39 Rock Tomb and the Boulder Badge.

Brock