You need to go to the Pokemon mansion in Cinnabar Island. Go to the basement and obtain the Secret Key. Then go to the Pokemon Gym and it will be unlocked!
In the cinnibar island gym.
its inside the mansion
after beating gym leader blaine
You have to go to the old mansion beside the gym and get a key
instead of catching hipmontop get hitmollene at fight gym by beating gym leader then evolve hitmollene to hipmontop
you can catch him inside misy's gym but u need to stay there a long time
go to cicibar island, then go in the biulding right next to the gym and look for secret key. then get out and then you can go in the gym in cinabar island
you go in the Pokemon mansion and the gyms key is some ware in there.
This TM is given to you by the 7th gym leader Blaine after defeating him.
Blaine (fire type user), found on cinnabar island.
The 7th leader is Blaine. He uses fire pokemon.
Battle the 7th Gym Leader,stupid!