on the island where the gym is there is a mansion go deep in the there you will see a pokeball inside there will be a key then you can get in the gym
hint use the switchs
Blaine, the gym leader of cinnabar island, gives it to you after whooping his butt.
In the game Pokemon Yellow you have to beat the leader of gym seven in order to win the Volcano Badge. The leader of this gym is named Blaine and he specializes in fire type Pokemon. To enter this gym you first have to get the secret key. This key is located in the building across from the lab.
The fourth gym at Pokemon fire red is grass type gym
There are only 16 gyms in total, (8 in Johto, 8 in Kanto) so there is no 17th gym. *There used to be a gym on Cinnabar Island, until it was destroyed by the eruption of the Cinnaber Volcano-some time between Pokemon Red and Blue/Firered and Leafgreen and Pokemon Gold and Silver/Heartgold and Soulsilver.*
You will get the 7th Badge which is the Volcano Badge from Blaine, the Gym Leader of Cinnabar Island however you will need to receive the Key from within the Pokémon Mansion before you can unlock the Gym's locked door.
red dont have a gym,but hes deep somewhere in mt.silver.
beat the gym
Find the secret key in the Pokemon Mansion,( Next to the gym)
do you mean blue? because red's not a gym leader. but red is on top of mount silver
The poisonous gym of Koga's command in Fuchsia city comes first in Pokemon fire red and in Pokemon leaf green
you go to the Pokemon mansion next to it and at the very end of it is the key to the gym
2nd.