you beat Archie on emerald
They fight in Sootopolis City (Japanese: ルネシティRune City) (Emerald only)
the fight is kinda corny kyogre and groudon can be seen fighting at sotopolis city the fight wil end til you wake rayquaza then rayquaza does a cry and both Pokemon disapear.
You can't get Kyogre in Pokemon Ruby but you can get Kyogre in Pokemon emerald and sapphire and in ruby you only get groudon and rayquaza. In sapphire you get Kyogre and rayquaza and in emerald you can get groudon, Kyogre, and Rayquaza.
Sootopolis City
groudon,kyogre,rayquaza
You don't
There are many legendary Pokemon in emerald, such as groudon, rayquaza, groudon, deoxys, and such. Groudon and Kyogre are not available until after beating Wallace, but Rayquaza can be caught right after the major battle between groudon and kyogre.
In what game? In Ruby, Groudon is n Cave of Origin, before Rayquaza In Sapphire, Kyogre replaces Groudon. In Emerald, Groudon is in Terra Cave and Kyogre, Marine Cave.
No, you need to get Ruby. Or you can get Emerald where you can get both Kyogre and Groudon, including Rayquaza.
You can fight in the battle tower, catch the three regis, search for latios/latias, or in emerald you can catch groudon and kyogre
sootopolis city
Kyogre,Groudon, raquaza, Latias and (or) Latios