First catch a Groudon in Soul Silver at the Embedded tower at route 47, then you MUST trade a Kyogre in the Embedded tower in Heart Gold at the same route. Finally you bring both Groudon and Kyogre to Pallet Town and talk to professor Oak, then he'll give you a jade orb. Then you go to the Embedded tower to catch Rayquaza
You cannot catch Rayquaza in Pokemon Pearl. You will have to have caught it on Ruby/Sapphire/Emerald and migrated it to Pearl. Then you have to catch it at Pal Park.you cant catch rayquaza in pearl. you can only migrate from ruby,sapphire,or emerald or use cheat with action replay. you have to migrate it from ether Pokemon rudy/sapphire or emerald To get a Rayquaza in Pokemon Pearl you will need to trade with Pokemon HeartGold or SoulSilver. To access Rayquaza in Pokemon HeartGold or SoulSilver you need to show Professor Oak a Kyorge and Groudon. This will give the player a Jade Orb that can be used at the Embedded Tower to access Rayquaza in Pokemon HeartGold and SoulSilver. This Rayquaza can be captured and then traded to Pokemon Pearl.
Rayquaza isn't in Crystal.
Trade from another game.To find Rayquaza at the Embedded Tower you must show Professor Oak a Groudon and Kyogre caught at the Embedded Tower. The Embedded Tower is new to HeartGold and SoulSilver. In HeartGold you catch Kyogre but cannot catch Groudon and vice-versa in SoulSilver, so you must trade with someone who has SoulSilver for a Groudon then show that to Professor Oak. If the Pokemon is not caught at the Embedded Tower then it won't count.
You cannot catch rayquaza in fire red you must trade from either ruby or sapphire.
The cool legendaries you can get in Soulsilver/heartgold are the following: Lugia, Ho-oh, Raikou, Entei, Suicune, Articuno, Moltres, Zapdos, Mewtwo, Latias, Latios (Latios in Soulsilver & Latias in Heartgold), Kyogre, Groudon, Rayquaza (Kyogre in Heartgold, Groudon in Soulsilver & Rayquaza if you have both).
After you catch him, you should go to professor oak.
You can only get a rayquaza by transferring it from heartgold or soulsilver or by the GTS.
Sadly, you can't, you can only catch groudon, but, if you get both, you can catch rayquaza!
To get Rayquaza in SoulSilver you must first catch Groudon then get a Kyogre by trade (because you cant catch Kyogre in SoulSilver). Then, when both are in your party, go see Professor Oak and he will give you a Jade Orb which will allow you to catch Rayquaza. It will be in the Embedded Tower.
You need to have both Kyogre and Groudon.
your main goal is to get all pokemon
You can always catch Groudon. And Rayquaza too.
You have to get both Groudon and kyogre which are exclusive for heartgold and soulsilver. In heartgold you catch Kyogre and in soulsilver you catch Groudon so you have to trade to have both. Once you have them go back to the place you cought them and make sure they are both in your party (and you have the jade Orb) and rayquaza will be there waiting for you to get pwnd or for you to catch it.
Your main goal right now is to be completing the National Pokedex.
in heartgold and soulsilver: get 16 gym badges go to mr. Pokemon and he will give you (blue orb heartgold)(red orb soulsilver) catch which ever either kyogre heartgold groudon soulsilver but then you need to trade with your friend to get the jade orb from prof. oak go to ebbemed tower see rayquaza catch it if you can by pkmndude12
Pokemon Ruby, Sapphire, Emerald, SoulSilver, HeartGold.
You can't without hacking, unless you have HeartGold and SoulSilver. Why, one word, HM Moves, Rayquaza can't migrate, you need to get Rayquaza on the Nintendo DS. (This requires HeartGold and SoulSilver. You need both, you'll see why...)