You need to link with a friend to play the minigames.
Sorry but its not possible without cheats.
you need both ruby and Sapphire to get there. :)
there is no 4 island
There no Mew in firered.
You need to beat the elite four, catch 50 different kinds of pokemon and then Bill will bring you to one island to talk about linking to the hoenn region. Then Bill will give you the rainbow pass which let's you go to islands 4-7. Good luck
It is on island 8 (navel island).
do the errand for bill on one island.
Lilygrove is not an island people say it is but NO it is not.
you can get deoxys at birth island
One Island.
one island
he isn't in the one island