Gym Leader Guide - Pokémon Red and Blue
Brock
Brock specializes in the use of rock-type Pokémon. He is the first Gym Leader in the game. Choosing a Pokémon with a type advantage against his own such as Grass or Water would be the best of choices in this case.
- Geodude - Lv. 12

- Onix - Lv.14










