if you played out the Pokemon league, its closed and you cant open it again unless you start a new game
You will see them again at the Cave of Origin. There is a cavern that you will need to find underwater to get to the Cave of Origin. You will need to defeat the Mossdeep gym leaders.
You can only get to it when kyogre and groudon are fighting you are not allowed back in ever again after that
You get the move waterfall on the second floor of the Cave of Origin.
the cave of origin is only in ruby and sapphire and emerald.
Actually, you don't ever need to set foot into the Cave of Origin in Pokemon Emerald after beating the Pokemon League ever again! There is no need nor no reason for you to be there anymore, anyways.
in sootopoolis city in cave of origin
In the cave of origin and marine cave.
In Sootopolis City, at the side where the PokeMart is. Go up, and you'll find Cave of Origin
The Cave of Origin is in Sootopolis
Groudon can be found at: Cave of Origin, Terra cave.
To get past the man to enter the Cave of Origin you need to reach a certain point in the story. You will not miss the Cave of Origin as the story directly tells you go there once you've reached that point.
it is in sootopolis city.