You will need to work your way to the basement in the Pokemon Mansion, you will then find the Key.
Its inside a pokeball inside the Pokemon mansion on Cinnabar Island
If you mean Pokemon FireRed/LeafGreen on the GBA, the mansion is in the top left corner of Cinnabar Island. (home of the seventh gym)
The Pokemon Mansion is at the top of Cinnabar Island near the Gym. There you can catch any fire types like Vulpix. You can also find Muk and Grimer.
The seventh gym is on Cinnabar island,right down of pallet town.To open the doors you must reach to a certain room of the Pokemon mansion.You get a key and open the seventh gyms doors,and the gym is a fire gym
With the secret key which is found in the Pokemon mansion.
The 7th gymbadge is in Cinnabar Island
You will find the key to the Gym of Cinnabar Island, From the Pokemon Mansion that is on the same island.
I think you get it in either cinnabar island gym or virdiran city gym
He will appear after you beat the 7th gym leader.
It's in Cinnabar island. It's where you get the key to open the Gym #7
he is in the gym believe it or not, you just need the key found in the Pokemon mansion.
Its inside a pokeball inside the Pokemon mansion on Cinnabar Island
its in cinnabar island, south of pallet town use surf to get there it is a fire gym
you have to go into the pokemon mansion on cinnabar island and navigate your way around there untill you find the key
its in seafoam island not cinnabar
You will find it in the Pokemon mansion on cinnabar island.
If you mean Pokemon FireRed/LeafGreen on the GBA, the mansion is in the top left corner of Cinnabar Island. (home of the seventh gym)