it is at sea foam islands. once you enter go up the ladder and you will have to figure out the rest yourself.
he is on cinnibar island
on cinnibar island beat the 7th gym 1st tho
you find him in sed foam island because his gym burned down at cinnibar island
In Viridian City. Blue is the gym leader and you'll find him lingering on Cinnibar island. You will be able to battle him after collecting all your other badges and talking to him there.
Viridian? I think that's Gary, he's on Cinnibar island (think that's what it's called) but before you can battle him you have to go to seafoam island and you will find blaine's gym. You have to do that before blues gym.
the eighth gym is in virdian city, talk to blue on cinnibar island and he will go back to his gym.
I'm assuming that you mean Blaine, the Cinnibar Gym Leader. Right on the sign next to the Pokemon Center in Cinnibar, there is a message stating that the gym moved to the Seafoam Islands. The bottom island is where the gym is located, but after entering it, you need to climb the ladder inside the first room.
to face the viridian gym leader Blue (Gary) you have to get the first 7 of the gym badges from the kanto region and speak to him on cinnibar island, he will return to the gym an await your challange. his Pokemon are quite strong so train hard :)
Unfortunately, Cinnibar Island is never rebuilt. The place remains in ruins for the game. Blaine continues to stay in his "made" gym.
you ask professer oak in pallet town
You cannot literally get 'into' Cinnabar Island, but only stay 'on' it. You have to surf south of Pallet Town to get to Cinnabar Island. You cannot go south of Fuchsia City due to construction.
He is on Cinnabarr Island.