defeat team magma & aqua and go to sotopolis go to the gym then the cave
In the cave of origin and marine cave.
There is no Pokemon in the Cave of Origin in Pokemon Emerald.
the cave of origin is only in ruby and sapphire and emerald.
Nothing exciting happens there on emerald.
A desert I think
KYOGRE!
in sootopolis city
The cool thing about emerald is that you can get 2 kyogres in the game: One in the cave of origin the other in marine cave.
In Sootopolis City, at the side where the PokeMart is. Go up, and you'll find Cave of Origin
it is inside the cave of origin
In the cave of origin which is in sootoplis city.
To open the Cave of Origin in Pokémon Emerald, you must first go underwater to the Seafloor Cavern. There you must defeat Archie.