After beating the Elite Four you have to have data on 60 different Pokemon, then talk to Celio and he will exchange your Tri- Pass for the Rainbow pass and you can now go to islands 4,5,6, and 7. To go to these Islands talk to the person who took you island 1 and select " more". Choose your island.
You have to get the HM Fly and then let a flying Pokemon learn it. Then choose that Pokemon with Fly and then a miniture menu will come up and choose the one that is hilighted in blue and says FLY and choose an island to go to.
P.S. Cut is obtained in your journey to Vermillion city(3rd badge/thunder badge). Fly is obtained near the biking area in Fuschia city(5th bagde/soul badge). Surf is also obtained in Fuschia city. You have to reach the end of the Safari zone and a nice guy will give you the HM Surf as a prize for reaching the end of the safari zone(I am still playing the game so I don't know where the other HM's are).
obtain 60 Pokemon on your pokedex, then beat the elite four, oak will talk to you and upgrade your pokedex, now go to vermillion city, get a boat and you will have islands 1-7 to visit now :)
The seven islands were included in FireRed and LeafGreen, and thus are not in yellow.
There isn't one.
island 4
You can double your Pokemon in fire red by putting them with a ditto on 4 island.
you have to go to 4 island NOT
You can't get to Four Island in Pokemon Red Version.
the togepi egg is in the water labyrinth on 5 island, not on 4 island
There is no such island in Pokémon Red.
Celio in one island has it. When celio askes you to get a sapphire he will gove you it
you have to get the rainbow pass I think.
You have to get the Rainbow Pass to get to 4 Island in Pokemon.
get stronger, i recoment training on island one.
you have to beat the elite 4 before you can get the pass to the islands.
4, 5, and 6 island