You have to beat the elite 4 and catch 70 types of Pokemon then go to professor oak and he will give the national dex then talk to cilleo on first island
there is no 4 island
Seven Island
On Cinnabar Island
In the cinnibar island gym.
in a island to get there you need mistery gift
Surf south of Pallet town
Yes but you can only do so after you beat the Elite 4 in Fire Red. Start by getting the Ruby on One Island inside Mount Ember.
You need to use a gameshark. :/
On seven island in sevault canyon its semi-rare.
Beat the pokemon league.
Bill asks you to go to one island not four island and second of all if you finish the 1-3 island sidequest and get the ruby and deliver it to Celio you can go to islands 4-7.
The official name of island 4 on Pokemon FireRed is Floe Island. To access Floe Island you need the Tri-Pass from Bill. To obtain the Tri-Pass you need to have defeated the Gym Leader of Cinnabar Island.