you have to go into the pokemon mansion on cinnabar island and navigate your way around there untill you find the key
The 7th gymbadge is in Cinnabar Island
Arcanine at level 48.
to open the door of the 7th gym!
there is a key in the Pokemon mansion... you need it to get into the gym... search the Pokemon mansion thoroughly
Get the 7th or 8th gym badge, and its in the Power Plant.
He will appear after you beat the 7th gym leader.
beat Giovanni in saffron, beat the 7th gym finish the quest on the islands and go to viridian city. the gym over there is the 8th gym.
where artacuno is in leafgreen up the ladder.
You will find the key to the Gym of Cinnabar Island, From the Pokemon Mansion that is on the same island.
read the question, "where is the 7th gym leader?" everything you need to know will be in there
well first after you beat the 7th gym leader bill takes you there to the islands
in seaform islands near cinnabar island where the 7th gym is hoped tht helped.