How to catch Rayquaza: After you have defeated the Pokemon League, head east from Pacifidlog town onto route 131, and check the northern edge as you go along. You'll eventually find a gap that will lead you to an island. Land on the island, then enter the small cave and run through to get onto the top of the island. You will find an immense tower here, the Sky Pillar. To reach the top, you'll need the mach bike, some patience, and a bit of skill. All you have to do is ride all the way to the top-easier said than done, since a mistake will send you down a floor. When you make it, save your game. It would also be a good time to use the master ball if you saved it.
Added by: Darkstalker , ID#268