you must defeat blaine first then after you defeat blaine you get outside of the gym and then you will see bill talk to him and there you go you can now go to the one island...
in 1 island Pokemon center
1 island
on island 1, in the pokecenter. u can get to island 1 by acheiving the rainbow pass
Give it to celio in 1 island
You get the HM rock smash and teach it to one of your Pokemon. You get it on island 1.
Growlithe is found in the Pokemon Mansion on Cinnabar Island in Pokemon Firered.
on cinnabar island
Beat the pokemon league.
There no Mew in firered.
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.
you can get deoxys at birth island
On Cinnabar Island