The Marine Cave can be located in 4 different water routes which are Routes 105, 125, 127 and 129 however you have to talk to the guy at the top of the Weather Institute in order to pin down exactly what route it's located in however it'll switch to another aforementioned route if you take too long finding the cave.
381928
in oldale town
go to the cave of origin in sootopolis
up be hind where the cave is
In Emerald there are cave in which you get them. I THINK you need dig dive and flash.
its in Marine Cave
Marine Cave
In Pokemon Emerald, Groundon and Kyogre are legendary Pokemon. You can find them in the Marine Cave and the Terra Cave.
Simply use dive or an escape rope.
Kyogre is the name of a Pokemon only available in the Pokemon Sapphire and Pokemon Emerald video games. Kyogre can be found in the Cave of Origin, near Sootopolis City, in Sapphire, and it appears in the Marine Cave in Emerald. The location of the Marine Cave changes periodically in the game.
Desert ruins, Ancient tomb, Island cave, Sky pillar, Cave of origin, Marine cave, Terra cave.
I do not know if you can catch Kyogre in Emerald but if you could, Kyogre will be in the Cave of Orgin at Sootopolis City. ;) ANSWER At marine cave, but I dont know how to get there
Kyogre is in marine cave. (Beat the elite 4 first then talk to the professor in weather institute to know where Marine cave is)
Granite Cave is located northwest of Dewford town.
It is Altering Cave which you can enter only after you beat the Pokemon league.
after you beat the Pokemon league go where the shoal cave is then look to your left and the is a dive spot dive and go through and then go up then there is a cave and that is the marine cave.
Answer 1: you cant only by tradeing or hacking stupids Answer2 : You can get Kyogre at Pokemon Sapphire (Cave of Origin) , Pokemon Emerald (Marine Cave) , and Pokemon HeartGold (Hidden Tower).