What are all the ways that the guy sees mirage island?

Every now and then few are lucky to win the grand prize in the lottery in the lilycove city dept store its a masterball but if you have the Pokemon that helped you win the lottery in your party you will receive one more prize. Go to Pacifidlog Town and go into the bottom right house talk to the old man looking to the right he will say "I can see Mirage Island today" Surf east and there it is, you can find Lechi berries on the island as well as unlimited Wynauts!