Unfortunately the only real easy way to catch rayquaza is to use your master ball. if you really want to save it for Latias/Latios (Which you shouldn't because rayquaza is 10x better) is to paralyze him and then use the best ball you have in your inventory, but first you must get him down to low red in hp.
You can catch Rayquaza in the map called "Blackthorn City".
GO to route 130 , and catch Rayquaza. GO to route 130 , and catch Rayquaza. GO to route 130 , and catch Rayquaza.
No, you cannot catch Rayquaza in PokÃ©mon Black.
Rayquaza is not avaliable in Pokemon XD
You cannot catch rayquaza in diamond
You cannot catch a Rayquaza in Pokémon Black, you will have to either transfer it from a previous game or you can also trade with someone for a Rayquaza.
You can only get Rayquaza in Emerald unless you trade.
It is not necessary to catch Rayquaza. It's an optional legendary Pokemon that you can find at Sky Pillar.