First you have to get HM05 (surf) from the safari zone. It is the reward for finding the 'end' of the safari zone. then fly to pallet town, and go to the southern most part in the town and surf on the small bit of water sticking out. Continue to surf down and you will eventually find the island where the 7th gym is. To get in you need to go to the large building to your immediate left (if you see a carpet going up, it is the right one, if not it probably the one above it) you need to get to the end of this area by using the various switches located in the statues. When you get there you should find a 'secret key' this is used to unlock the gym door.
Blue (The eighth gym leader) is waiting on Cinnabar. He won't battle you unless you've beat the rest of the gym leaders
you have to find it
In the Pokemon forest
On the way to Snowpoint City. Behind a cottage on the way, you will find the HM Rock Climb. You can use that once you beat the seventh gym leader Candice. She uses Ice-Type Pokemon so have some good Fire-Types in your party!
easy if you want to challage the Pokemon leader you have to go to the light house and go to the top and find the gym leader then you challage the leader get the HM then you go to the Pokemon league
The seventh gym leader is Candice, the Ice Type leader. She is at Snowpoint City.
u need to push the snowballs around and find a path to her like to pryce the seventh gym leader in pokemon soulsilver and heartgold
Cinnabar Island.
Blue is the guy you go to if you want to find the viridean gym leader
the seventh gym is the first gym at the begining of the game. the leader is giovani of team rocket. he's ground and normal type
After beating blue, the 16th gym leader
You can find it once you enter Gengar's heart. To find it go to Drakfol Cave and go deep inside. There you will find the 7th gym. I would take some rock Pokemon for the leader.
you need to go to lake acuity and if you did you need to go to spear pillar.
to battle Blue in Pokemon Heartgold you must defeat the 7th gym leader, then find him on cinnabar island. Talk to him, then he will go back to his gym for you to fight
Get the Rainbow pass and go to the seventh island talk to the lady at the pokemon center in the top hat, and she will lead you to looker.
the seventh gym leader in snowpoint city lets you use it outside of battle but you find on the snowy route on the ground right next to the city
In the original Silver game, the gym leader was Blue and you would find him at Cinnabar island. After meeting him there, you can go back to the gym and fight him.