Rayquaza cannot be caught in Pokémon FireRed and LeafGreen. Trading it over from Pokémon Emerald is required. You must first obtain the National Pokédex from Professor Birch after beating the Elite Four, though.
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 trade rayquaza from Pokemon emerald(or other games depending which you have your rayquaza on) to fire red to get rayquaza on fire red, you can only do this after helping celio after cinnibar island gym
you cant catch rayquaza in Pokemon black
You cannot catch it on Pokemon firered only on diamond pearl and thhe new one Pokemon platinum
Level 100
Rayquaza isn't in Fire Red/Leaf Green.
You can't get Rayquaza in Firered.
You cannot catch rayquaza in fire red you must trade from either ruby or sapphire.
There is no way of getting it.
Rayquaza.
You can only get Rayquaza in Pokemon Ruby, Sapphire, and Emerald. If you want to get a Rayquaza in Pokemon Leafgreen or Firered, you will have to get a second Game Boy Advance or SP with a link cable to trade Rayquaza into your firered or leafgreen.
Get the cheat machine for gameboy advance and catch it or trade it from embreald
You can catch Rayquaza in the map called "Blackthorn City".
Rayquaza is not avaliable in Pokemon XD
No, you cannot catch Rayquaza in Pokémon Black.
How do you catch rayquaza in Pokemon black and white
To get Pokemon firered on PC download a vba and Pokemon firered ROM