After beating Red, Professor Oak will give you one of the three Kanto starters. Receive it, then go to Mr. Pokemon to get the Red Orb. Groudon waits in the Embedded Tower located in Route 47.
To catch Grodoun in Pokemon SoulSilver, you need to find the Embedded Tower. To access the tower, you are required to carry a Red Orb. From what I know, you need to have obtained the National Pokedex from Mr.Pokemon as well as retrieve a Kanto Starter Pokemon from Professor Oak.
bug catching contest
At the Pokethlon Dome or at the Bug Catching Contest
If you saved your game before catching the legendary Pokemon reset the game that way you can try catching it again.
After catching Groudon in Pokemon Soul Silver talk to Oak. He will tell you to get Kyogre. You get it by tradind of using cheats.
You have to go to prof oak he will send u somewhere :)
catch it in the bug catching contest on Thursday and Saturday
The days that the Bug Catching Contest takes place every Tuesdays, Thursdays, and Saturdays.
You have to migrate Pokemon from older games like Leaf green and Fire red. Then get them to your game. You will be able to enter the catching show. You can enter any Pokemon from the game you got Pokemon from.
You trade it to Pokemon platinum after catching it in Pokemon Soul Silver or in Heart Gold. In Cerlun City in Kanto. (after beating Lance the champion).
You can't. It is a Soul Silver pokemon. But you can find one on tuesdays, thursdays, and saturdays during the Bug Catching Contest.
Try and trade a Kyorge with a Pokemon and go to the place where you get the orb and go back to get Rayquaza.