Celadon City. It will be a Girl named ERIKA, she has Grass pokemons.Her pokemons are Victreebel, Tangela, and Vileplume. You'll receive the Rainbow Badge once you defeat her.
Her name is Erika
beat erika, fourth (celadon) gym leader, who uses grass Pokemon
In Celadon city.Celadon City, Leader: Erika. Specialty: Grass. Prize: Rainbow badge.
The key to the gym
the 5th gym is saffron gym with sabrina!
The fifth Gym Leader in Pokemon LeafGreen is Koga, the leader of Fuschia City's Gym. He specializes in Poison-type Pokemon and hands out the Soul Badge.
The fourth gym at Pokemon fire red is grass type gym
Yes, if you get the Gym Badges.
The Fourth Gym is in Lavaridge City.
the fourth badge is found in celadon city at the bottom in erica's grass type gym
Sabrina's gym in saffron city
there is a key in the Pokemon mansion... you need it to get into the gym... search the Pokemon mansion thoroughly