You have to get it from Pokemon soul sliver or heart gold or trade.
You can catch rayquaza
You cannot get Rayquaza in Pokémon Black.
How do you catch rayquaza in Pokemon black and white
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.
Rayquaza cannot be caught in Black or White and needs to be transferred from an earlier version.
Rayquaza Definetly Because Emerald is about Rayquaza.
Rayquaza
you can't get rayquaza in Pokemon black/white. you can get it using gts negotiations , you can trade it with your friend or transferring from other version with poketransfer
Poketransfer.
you have to migrate it
No, you cannot catch Rayquaza in Pokémon Black.
You cannot catch Rayquaza in Pokemon Black 2.