Seven Island is part of the Sevii Islands which can only be accessed by the Seagallop ship which can only be boarded with the Rainbow Pass.
The secret is the Pokemon unown.
Beat the Elite Four, Get Rainbowpass from cello,and tada! You are at seven island
In icefall cave at four island.
It's in Cinnabar island. It's where you get the key to open the Gym #7
you will find it on island 7 when you complete the battle tower
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.
---- the mysterious rumble releases the legendary dog on 7 island.
first go to cinnabar island second loo for the keys at the pokemon mansion
You need the secret key which is found in Pokemon mansion which is also on cinnibar island.
on cinnabar island
Cinnabar Island