Mirage Island Pokemon Ruby, Sapphire, and Emerald

Talk to the old man in the bottom left house in Pacificlog town. He will say weather or not he can see Mirage Island today. If he says no come back a different day and ask again. If he says yes then head out to Mirage Island. There you will find Wynauts ranging from Lv 5-50. Also there is the Liechi Berry there that cannot be found anywhere else int he game so I suggest getting it while you are there. It is very rare to actually see Mirage Island so do not get frustrated if you cant seem to every get to see it.