In there you can find the Pokemon unown but only after solving the puzzle in tanoby key to do that push all the boulders using Strength onto the small holes.
if you mean cinnibar island than hes in the poke center(red building)
You cannot get to Fire Island on Pokemon LeafGreen. Fire Island is a setting exclusive to the second Pokemon movie, Pokemon the Movie 2000.
Four Island is a location in Pokemon LeafGreen. To start the journey there, you need to have at least 60 different Pokemon.
on cinnabar island
on cinnabarb island
4 island.
Cinnabar Island
No, but you can breed them on island 4.
The Pokemon day care for Pokemon Leafgreen/Firered is on island 4. You have to beat the elite 4 and get the machine on island 1 working to go there.
island 3
seafoam island
of course!