The first island in Emerald version is Dewford Town. To get there, you need to rescue Mr. Britney's pet Wingull (named Peeko), then walk to his house just outside of Petalburg City. He will then sail you to Dewford.
There isn't a third island in Pokemon emerald.
You go to birth island
in pokemon emerald you can go to the two island next to the battle frontier
You'll have to go to Birth Island.
Yes you can go to birth island or you can get a gameshark
no
to go to secret island you need to get a ticket but they are kind of hard to get
pokemon rock site
get the eon ticket and go to southern island
yes
you don't you need a Nintendo event
Gameshark code 153SUckAdick