YOu must have beaten the sevn gym's and the elite four, plus your Rival. Once this is completed you need to go and capture 60 diffrent pokemon. Then go and speak to Oak and he gives you a item. Now go to island one and speak to Cleio and he tells you to get him two Gem's. once you have them he gives you a pass for the other four island, island 4, 5, 6, and 7.
Seven Island
Island Seven. In the ruins.
It is on Seven Island, to the north.
Seven island at sevault canyon.
On seven island in sevault canyon.
northern seven island
Cinnibar island if your going in order.
Larvitar is in Seavault Canyon, which is on Seven Island. (Need rainbow pass to get to Seven Island).
There is no island 9 in either Pokemon FireRed or LeafGreen. Whoever told you this is very off. There are Seven Islands (Sevii Islands)
Yes, go to Sevault Canyon in Seven Island.
Evolve Larvitar, which you get at Seavault Canyon on Seven Island.
On seven island in sevault canyon its semi-rare.