Use ar card in your ds
Theres a blue orb on route 47 talk to the water gym leader after realeasing a girl level 50 shuckle in cianwood city from the 10 box in the pc then you can can get a kyogre ina cave west of cliff cave in a broken tower
It is not called hidden cae or brocken tower it is called embedded tower!!
You can also use action replay I did and it worked
You can't you can only find groudon in soul silver
You go to the Hidden cave
Kyogre is in a cave west cliff cave in a broken tower and you need the blue orb
Kyogre is in heart gold. Groudon is in soul silver.