4 island.
The Pokemon day care for Pokemon Leafgreen/Firered is on island 4. You have to beat the elite 4 and get the machine on island 1 working to go there.
No, but you can breed them on island 4.
after beating eliet 4 and champion
catch 60 different Pokemon, then talk to professor oak.Beat the elite 4. Go to 1 island and talk to nett. he'll ask you to do a favor for him and get a ruby and sapphire for him. After you get the ruby on 1 island for him, he'll give you the ticket to go to all the other islands.
in the icefall cave on 4 island.
you go to island 4 and ice berg cave it is in there.
Catch 70 Pokemons and after you have done that talk to OAK
HM 07,WaterFall,is inside the cave on 4 island
They're on the FIFTH island.
Beat elite 4 and take the boat from vermilion city to six island
its on island 4. but to get there you have to have the rainbow pass then board the vermillion boat port.