First find the gym leader on cinnibar island then go to viridian city you can now enter the gym.
The 6th gym (Steel type) does not unlock any new HM , instead the 16th Gym (Blue's Gym) unlocks Rock Climb
The 16th gym is the Viridian City Gym.
there is no 16th gym in soulsilver u dope....
the 16th gym leader is:Trainer Blue
after you get all 15 badges go to cinnabar island and there will be the 16th gym leader after you talk to him go to the virdian city gym and he will be there
its actually the 8th gym so you need 7 badges and then it will unlock
If you mean, "how do I unlock the Gym where he is", you have to go into the mansion and get to the basement. There you will find the key to open the Gym
yes, and you have to battle her to get your 16th gym badge
By Completing the 1st 2nd 3rd 4th 5th 6th 7th and 8th gym then you will be able to unlock the 9th gym easy. I recommend you capture legendaries for this gym :)
You have to beat the 2nd gym.
The 16th gym leader is Blue. You can only fight him after you win all 15 gym badges. after you get all 15, go to cinnabar island, blue will be there. show him your badges and he will return to the gym so you can fight him
Sabrina