I'm assuming you mean how to get past the invisible walls. To get to Koga, follow the perimeter of the gym to the right, until you reach the northwestern corner of the gym. Head downwards until you're right about in between the juggler and the Tamer. there will be a breach in the wall, and from there, just find gaps until you reach Koga.
i'm pretty sure you get it from Koga when you beat him(Koga is the 6th gym leader)
you need to have all ground type Pokemon to beat koga i would say a a nidoking of nidoquenn you need to have all ground type Pokemon to beat koga i would say a a nidoking of nidoquenn
After defeating Koga the fuchsia gym leader he gives you the TM Toxic
he is the fushia gym leader, u need to get passed the snorlax to get to fushia city which requires the pokeflute
The fifth Gym can be found in Fuchsia City. The leader is Koga, who specialises with Poison-type Pokémon.
i'm pretty sure you get it from Koga when you beat him(Koga is the 6th gym leader)
Koga's Pokemon are: Koffing Muk Koffing Weezing
you have to beat koga in fushia city
You get the soul badge from Koga in Fuchsia City.
you need to have all ground type Pokemon to beat koga i would say a a nidoking of nidoquenn you need to have all ground type Pokemon to beat koga i would say a a nidoking of nidoquenn
After defeating Koga the fuchsia gym leader he gives you the TM Toxic
Brock, Misty, Lt Surge, Erika, koga, Sabrina, Blaine and Giovanni
he is the fushia gym leader, u need to get passed the snorlax to get to fushia city which requires the pokeflute
if you mean rainbow badge go down cycling road and vs koga
The fifth Gym can be found in Fuchsia City. The leader is Koga, who specialises with Poison-type Pokémon.
The poisonous gym of Koga's command in Fuchsia city comes first in Pokemon fire red and in Pokemon leaf green
Janine can be found near the safari zone after beating the game you can't fight her but if you talk to her she will mention her dad koga.