You can get in once Steven and Wallace grants you the permission
go to the cave of origin in sootopolis
its actually steven who gets you into the cave of origin, and Wallace can be found inside
You get it from Sootopolis's Gym by defeating the Gym Leader.
After beating the twin leaders in mossdeep gym you go to sotopolis city and do alot of things that team aqua leader asks you to do and volia! after you done these favors you can go inside the cave of orgin and find groudon!!!!
the girl at the very end of sunnyshore, she will give you the HM when you get the final gym badge
After beating the gym leader you will be asked to calm down groudon and kygre
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.
Nothing exciting happens there on emerald.
Cave of origin is in sootopolis city in ruby emerald and sapphire. Play through the game and you gain access to it. (Before the elite four you get to it)
A desert I think
KYOGRE!
There is no Pokemon in the Cave of Origin in Pokemon Emerald.
the cave of origin is only in ruby and sapphire and emerald.
There is no key. The Gym Leader isn't there. He is in the Cave of Origin
you get it at cave of origin but you have to beat the gym leader of sootopolis city to use it on the waterfall to ever grande city
In the cave of origin and marine cave.
in sootopolis city