Simply go to Vermilion City\'s harbor and talk to the sailor that let you on the boat that lead to One island show him the Tri-Pass and he will let you back.
You go to the other islands.
You can't go to Johto in Pokemon FireRed or LeafGreen.
you need 2 beat the Pokemon league and have 60 Pokemon enteries on your pokedex. then you go to professor oak and he will say crap that's not important. then go talk to celio in 1 island and get the ruby at mt ember. take it back and he gives you a pass to islands 4-7.
catch 50 Pokemon and talk to prof oak grt natnail pokedex and go back
Go to vermilion city and go to the harbor show the sailor your tri pass to go to islands 1-3.
go to virmillion city. the place where SS anne is
Go to each to find out.
if u are refering to the sevi islands or if your not that far the three islands you go to the port at vermillion hope that helps if not well haha
If you mean the 9 islands its in Firered or Leafgreen.
go to the boat from which you came from you fool
Go to Verilimont city and go to the Sevii Islands.
Not regions seen in other games, but you can visit some islands that are introduced in the FireRed and LeafGreen games.
get a girlfriend....my friend....or, vote for ROMNEY
You go to the other islands.
After getting the ruby and delivering it to celio he will let you go to islands 4-7.
Go check Gamefaqs.
you cant but you can go to the sevii islands after you beat the game and can go the first three islands after you have won blaine the seventh badge