You need to have a ticket to get to the islands
Whirl islands are in the johto region which is not in firered.
it's rainbow islands and its the 1,2,3,4,5,6,7,8,9 islands
The Sevii Islands(islands 4,5,6,7)
theres no such thing as naval islands theres only the sevi islands
seafoam islands
you cant
its in one of the islands
nothing i think
Seafoam islands
Not regions seen in other games, but you can visit some islands that are introduced in the FireRed and LeafGreen games.
If you mean the 9 islands its in Firered or Leafgreen.
Inside Seafoam Islands.