How do you catch rayqaza in Pokemon?
You can lower its HP and then use an Ultra Ball. If you don't
want to waste a lot of time with it, you can always use the Master
Ball, but it's not necessary.
Go to the Sky Pillar on Route 131.
You can go to Blackthorn City where Clair is and it will appear eventually, but it is hard to catch so recommended with Pokemon that can paralyze or put the Rayquaza to sleep and bring a Master Ball or Ultra Balls with you. Make sure you bring the HP down quite a bit too before you attempt to catch.
Lots of things. You can get both Hoenn and Kanto starter Pokemon (Hoenn: Torchic, Mudkip, and Treecko. Kanto: Bulbasaur, Charmander, and Squirtle.) You can also catch Groudon. If you have a bud that has HeartGold, ask them for Kyogre, and you can get Rayqaza. The final thing: talk to Blue, and he'll give you the seal case. Hope I helped!:-)
defeat red then get koen starter from the guy at kanto starter from prof oak then go to the tower in safron get the hoen starter from guy at desk then go to the embeeded tower get groudon then get kyogre from heart gold talk to prof oak get the jade orb and go back to the embeeded tower and here is rayqaza