after u beaten the elite four go to fortree city.then go to route 119 to the weather institute and talk to the guy.
he will tell u where it is.
u can also catch kyogre
Groudon doesn't show in Pokemon Sapphire just like if you buy Pearl, Dialga won't show up in it.
Have it as you lead Pokemon and talk to him in his lab.
To get Rayquaza, you have to obtain the Blue Orb from Mr Pokemon, and catch a Kyogre on Route 47. Then you need a friend with Soul Silver to get the Red Orb from Mr Pokemon, and catch a Groudon on Route 47. Your friend needs to trade the Groudon to you, then you need to show both Kyogre and Groudon to Professor Oak. He will give you the Jade Orb. Go back to the Embedded Tower on Route 47, and Rayquaza will be there
After you catch Kyogre in the Hidden Tower, show it to Prof. Oak. Then you must get a Groudon from the Hidden Tower on Pokemon SoulSilver ONLY. It won't work if you just use a Groudon from another game (i.g. Pokemon Ruby.) When and if you do, show the Groudon to Prof. Oak and he should give you the Jade Orb.Hope this helps! =D
you have to have gotten groudon and you also have to get kyogre from a Pokemon heartgold (no other kyogre will work) then talk to mr Pokemon again and if u show him the groudon and kyogre he will give u the green orb, then go to the same place where you got groudon and rayquaza will appear
Pokemon ruby sapphire and emerald
You have to have both Kyogre and Groudon. You get the Red Orb from Mr. Pokemon to catch Groudon in the Embedded Tower. In addition, the Groudon has to be from SoulSilver and the Kyogre must be from HeartGold. Show them to Professor Oak for the Jade Orb to awaken Rayquayza.
Groudon and Kyogre are'NT in movies but in a show instead, but kyogre is shown near the end of the Pokemon ranger and the sea temple movie, and rayquaza is shown in the Pokemon movie destiny deoxys
What you do is trade that Kyoger to a friend that has Pokemon soul silver for Groudon show that Groudon to Mr.pokémon and he will give you the Jade Orb with that orb you will be able to catch Raquaza. hope this helped
trade kyogre from heart gold our migrate form Sapphire or emerald. then show prof. oak kyrogre and he will give you the jade orb.
In order to get the Rayquaza event, you also need to show him Groudon. You will need to trade it from another game because you cannot catch both Groudon and Kyogre in the same game.
You need both Kyogre and Groudon( Kyogre in HG and Groudon on SS) then go to Oak lab and show the two Pokemon to him and he give you the jade orb go to the embbebed tower and there is Rayquaza It is at Lv 50