yes after beating the elite 4 you can catch both him and groudon.
not much only in sapphire you can only catch kyogre and in emerald you can catch both kyogre and groudon.
you cant
You don't
You cannot catch Kyogre native in Pokemon Diamond. You must import the mighty Kyogre from Emerald or Sapphire using Pal Park.
Get one from sapphire or emerald.
Yes, you can!
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
no
You have to catch Kyogre and Groudon.
yes yes you do
you have to catch or kill kyogre
if you mean kyogre then you cant catch kyogre in ruby (sapphire and emerald only)