You can get in after you beat Archie at the route 128 cavern.
use their Pokemon
The Cave of Origin is in Sootopolis
the cave of origin is only in ruby and sapphire and emerald.
Cave of Origin.
in the cave of origin in sootopolis
You can only get kyogre in sapphire you get it at the cave of origin.
you can use it in any cave to get out of the cave
Go through the cave of origin and keep goin through the ladders until u find Kyrouge. :)
Same place it is on sapphire
You go in there after Kyogre is awakened, but until then, you don't.
No there isn't. The cave is in Pokémon Emerald
The Cave of Origin is accessible through Sootopolis City.