After getting to one island there is a guy named celio he asks you to get a ruby its at mt ember you must have the national dex and have beaten the elite 4 to get the ruby after giving the ruby to celio he will give you the rainbow pass and he will ask you to get the sapphire which is on six island. the rainbow pass allows you to go to 4-7 islands.
You have to fight the Pokemon league to unlock island four, five, six, and seven.
After you defeat the Elite Four.
The Daycare is located on Four Island, not Five Island.
No there are 9 islands, 0ne, two, three, four, five, six, seven, birth island, navel rock which is an island.
Beat the Elite Four, Get Rainbowpass from cello,and tada! You are at seven island
Seven Island if you don't include the elite four.
After getting the national dex you can find national Pokemon around one island, two island, three island, four island, five island, six island and seven island.
Johto is inaccessible on Leaf Green although Islands Four to Seven contain Johto Pokemon.
Four Island is a location in Pokemon LeafGreen. To start the journey there, you need to have at least 60 different Pokemon.
You can find a Metal Coat in FireRed and LeafGreen on Five Island in the Memorial Pillar, off of Five Island Meadow. You must have beaten the Elite Four and have the NationalDex.
You can't go to Hoenn on leafgreen, but after you beat the elite four you can trade with hoenn and go to the sevii islands. (all seven of them)
No its not an HM in leafgreen.