Yes, it is indeed a legendary Pokemon.
Rayquaza doesnt evovle its a legendary!!!
Groudon, Kyogre, and Rayquaza. Groudon is the fire legendary pokemon, Kyogre is the water legendary pokemon, and Rayquaza is the air legendary pokemon.
U cant breed Rayquaza because its a legendary Pokemon but u can breed other Pokemon as long its not legendary.
groudon,kyogre,rayquaza
Groudon and Rayquaza
rayquaza
Kyogre, Groudon, Rayquaza
no legendary can have eggs,except manaphy:phione
Some legendary Pokemon in saopphire are rayquaza, groudon, kyogre
The legendary Pokemon in Pokemon sapphire are groudon, rayquaza, Kyogre, Regice, Regirock and registeel EDIT: No you cannot unlock/get Groudon, Rayquaza, or the Regi's.
It is not necessary to catch Rayquaza. It's an optional legendary Pokemon that you can find at Sky Pillar.
Rayquaza if you want the details go to serebi net and type in rayquaza