Yes you do. Because after you do, you may also find a Latias or Latios depending on whether its Ruby or Sapphire.You must open i think 6 dots, or something, and then the 3 doors will open, one in a desert one next to lilycove, and one more next to dewford, on water...to open the 6 dots, you must have Dive and go underwater. Its pretty hard, but you'll need patience.
Good luck and Have fun!
in Pokemon ruby you DON'T need to beat the elite four to unlock the regice, regirock, and registeel
the only thing you need is a wailord and relicanth to unlock the doors an a Pokemon that knows dig surf and dive
if you don't have a Pokemon with dig you can get dig in Fallarbor Town and talk to the little kid in the house
HAVE FUN ON YOUR ADVENTURE
No.
yes
NO (only on ruby)
Beat the elite four
no
No, because there is no double battle in the elite four
yes in soulsiver. After you beat the elite four go to kanto and go to proffeser oak. i don't know about other games?
To unlock Groundon, you must beat the Elite Four and talk to the weather man.
No. -.- You can capture it without defeating them.
Blaziken Aggron Salamence Groudon Exploud Hariyama
Probably not.
swampert, groudon, blastoise, glalie, latios, and feraligator