Hey guys! For all you people out there saying that Cresselia on ORAS is encountered upon a luck, I have a unbelievable theory for you! While I was on Mirage Island, I decided I was gonna catch all the pokemon on the island, so I did, and when I did, I used my Eon Flute and left, and I noticed right away there was a Mirage Spot on my map that wasn't there before, but it wasn't called Mirage Island, it was called Mirage Forest. So I landed on Mirage Forest, nothing special there, just a item, and I also caught every pokemon on this island, then I used my Eon Flute again, but this time there were two more Mirage spots, Mirage Cave and Mirage Mountains, nothing special on either and I caught the pokes on both. The reason I'm telling you guys this is because I believe there are 5 different Mirage Islands. Mirage Island, Mirage Cave, Mirage Forest, Mirage Mountain, and Mirage ???. I believe if you catch all the pokemon on every 4 Islands each day, eventually there will be a mysterious Mirage Island with the legendary Cresselia awaiting us!