You cannot catch rayquaza in diamond
Rayquaza Definetly Because Emerald is about Rayquaza.
you have to migrate it
the black rayquaza is basically the shiny version of Rayquaza which is usually what you'll get. But if you get a shiny Ryquaza (black) that's pretty lucky.
master ball
I think you have to transfur from ruby version or something, I havent done it yet.
u find it behind a house in route 217
kyogre and rayquaza
You can't get Rayquaza in Ruby or Sapphire unless you trade it. you can, if you know the cloning glitch for Emerald, clone your Rayquaza and trade one to your Ruby Version.
Trade it from Ruby, Sapphire or Emerald version.
Rayquaza
Trade from emerald/ruby/sapphire.
No. It needs to be traded from ruby/sapphire/emerald