If you mean blaine, he's in the seafoam islands. To get there, go to pallet town, to a bit where you can surf. Go down and you will reach Cinnabar Island. Now surf left, and you will get to the seafoam islands. When you go inside, climb up and the gym will be there. Hope this helps!
the 7th gym in Johto is in Mahogany town. And in Kanto the seafoam islands.
The eighth gym leader still awaits, as well as the whole of Kanto.
The Seventh Kanto Gym Is At Seafoam Islands you get there from pallet town so go around that way hope it helped ;)
you have to go to every gym in kanto a beat all the gym leaders
Not enough info: which gym leader?
The final gym is the Viridian City Gym. Blue is the Gym leader.
defeat all the other gym leaders
beat pryce
you can get to blain in seafoam islands next to cinnabar island where you meet green/blue and if you talk to hom he says you have to beat blain
All you have to do is get to Viridian City.
Janine I think
misty