Brock
Gym Leader in Kanto.
About
Brock leads the Pewter City Gym, the first in Kanto, with Rock-type Pokémon. Both of his Pokémon are Rock and Ground, so Water and Grass moves hit them four times as hard; the stronger is a level 14 Onix. He gives the Boulderbadge and 
TM39.
Gym battle
As of v0.75.0 · engine 22ba612f