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
its on island 4. but to get there you have to have the rainbow pass then board the vermillion boat port.
Beat elite 4 and take the boat from vermilion city to six island
They're on the FIFTH island.