yes
raquaza is at the sky pillar latias and latios will be found randomly kyogre is at the marine cave groudon is in the terra cave mew and deoxys are both at ilands
they are both Pokemon that control the wheather. kyogre=rain groudon=sunny
To get Rayquaza, get both Groudon AND Kyogre. SoulSilver: Groudon HeartGold: Kyogre
go to the weather institute guy he will tell you were the weather in strange then go there so I hear
i think rayquaza because you need both groudon and kyogre to get rayquaza
you can only do this if you have beaten the elite four and have captured kyogre, groudon or raquaza(depending on what game you have.) use rocksmash at the entrance for groudon/ruby surf at the entrance for kyogre/saphire or fly for rayquaza/emrald kyogre will make the water rise, groudon will make land stairs, and rayquaza will make a cloud path. hope this helped :)
You have to come to the place where you caught Groudon/Kyogre, but you have to take both Groudon as Kyogre with you.
i think its only groudon you can catch
At the embedded tower after getting both Groudon and Kyogre. Have to trade either Kyogre or Groudon from HG or SS.
No, you need to get Ruby. Or you can get Emerald where you can get both Kyogre and Groudon, including Rayquaza.
cave of oragin
Groudon Kyogre Rayquaza Latias (u can only catch one, either latias or latios) Latios Regice Registeel Regirock