totally random chance. go to pacifilog and talk to the old man in the house on the right side of town. he'll tell you if it's there or not.
for more info see http://bulbapedia.bulbagarden.net/wiki/Mirage_Island
No the Pokémon Ruby and Pokémon Sapphire version of the Mirage Island is not in Pokémon Omega Ruby and Pokémon Alpha Sapphire however they made their own different variations of the Mirage Island concept but this time by creating more mirage islands that can appear at any time in the water routes or in the sky.
Route 130, which is in the region Honen, which is in Pokemon ruby,sapphire,and Emerald.
You cannot get to the island that is called Mirage Island in Pokémon FireRed. The island that is called Mirage Island was only created and can only be found in the Hoenn region and therefore can only be found in the games of Pokémon Ruby, Pokémon Sapphire and Pokémon Emerald.
the same way u get to mirage island in sapphire and ruby
Mirage Island does not always appear. When it does, it does. It is found between Pacifidlog Town\Sky Tower.
i don't know ,but i heard you have to get a mirage island compatible Pokemon
sorry doesn't exist. Mirage island does.
wynaut
Mirage island
Only in ruby, sapphire and emerald this is possible. To get there you must get the grand prize of the lottery and have the Pokemon that won it in your party then surf east of pacifidlog town to reach there.
A Razor Fang can be found on Mirage Island and Cresent Isle, which a Item Finder is required to find these items.
ruby- mt. ember(one island) sapphire- dotted hole(six island)