You cant, sorry.
Chat with our AI personalities
No.
First you have to beat the elite 4. After you do that you go to the weather institute and talk to the man on the second floor. He will tell you where you can find kyogre and after you catch him go back to the weather institute and talk to that same man this time he will tell you where groudon is.
You go to Sootopolis City. There you will see Groudon and Kyogre fighting, and Rayquaza goes to stop them. Then he goes back to the Sky Pillar.
It will not come back to life.
you go back to the cave where you caught groudon/kyorge