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.
on cinnibar island beat the 7th gym 1st tho
you ask professer oak in pallet town
the eighth gym is in virdian city, talk to blue on cinnibar island and he will go back to his gym.
it is at sea foam islands. once you enter go up the ladder and you will have to figure out the rest yourself.
Unfortunately, Cinnibar Island is never rebuilt. The place remains in ruins for the game. Blaine continues to stay in his "made" gym.
In Viridian city. You need to get all the other 15 badges first and then go talk to Blue on Cinnibar island/city.
you find him in sed foam island because his gym burned down at cinnibar island
you can't get to any of the Sevi island in Pokemon Heartgold and soul silver
You must first go to Pallet Town. From there, use surf and head south. Eventually, you will reach an island. This is 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.
surf from cinnibar to get to the seafom islands in the east
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.