In Pokémon Ruby, Sapphire, and Emerald, Mirage Island is found on Route 130 in Hoenn. The island has Wynaut which range from level 5 to level 50 and one Liechi Berry grows on the island. As described by Bulbapedia:
In Pacifidlog Town, a man will tell the player whether or not he can see Mirage Island, thus determining if the player can reach the location.
Even with the highly rare circumstances, have you ever visited Mirage Island? If you haven't, would you like to visit the island or no? Do you even care about the presence of Mirage Island?
Bulbapedia said:Every day, a random number between 0 and 65535 is generated by the game. If this number matches the last two bytes of the personality value of any of the Pokémon in the party (that is, the remainder when their personality value is divided by 65536), Mirage Island will appear for that day. The number is generated at 0:00 hours every day and it is active for 24 hours. Even though play time has nothing to do with the real-time clock, a game that has reached the maximum time of play (999 hours and 59 minutes) will not generate Mirage Island numbers anymore.
In Pacifidlog Town, a man will tell the player whether or not he can see Mirage Island, thus determining if the player can reach the location.
Even with the highly rare circumstances, have you ever visited Mirage Island? If you haven't, would you like to visit the island or no? Do you even care about the presence of Mirage Island?