Go to Vermilion and get on one of the many Seagallop boats (I think there are 10) and go to the item on the menu that says "Other" there you will find Five Island.
They're on the FIFTH island.
You cannot get to Fire Island on Pokemon LeafGreen. Fire Island is a setting exclusive to the second Pokemon movie, Pokemon the Movie 2000.
Fuschia city.
Fuschia city
The fifth Gym Leader in Pokemon LeafGreen is Koga, the leader of Fuschia City's Gym. He specializes in Poison-type Pokemon and hands out the Soul Badge.
Four Island is a location in Pokemon LeafGreen. To start the journey there, you need to have at least 60 different Pokemon.
Cinnabar Island
4 island.
on cinnabarb island
on cinnabar island
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.
No, but you can breed them on island 4.