YOU FIND RAQUAZA IN SKY PILLARYOU FIND RAQUZA IN SKY PILLAR
You can't get a raquaza in Pokemon Diamond.
You cannot catch Rayquaza in-game in Pokemon Black.
Go to Sootopolis City to watch Groudon and Kyogre still fighting then Rayquaza will appear in a cutscene and stop them from fighting. Once you beat the Pokemon league go back to Sky Pillar to capture Rayquaza.
rayquaza would then groudon then kyogue
go to pacifidlog town and go surf on the east(right)then when you see a cave that is called sky pillar,go up on the top and you will see rayquaza.
raquza of couse not just because he is cool but because kygore's water attacks have a little bit of reach raquza can fly It would depend on both Raquaza and Kyogre's abilities, known attacks, levels, and stats because neither has an outright type advantage over the other. -anh1227
go to sootoplis then talk to steven then go to the cave in sootoplis then you will find wally then go to skypiller and wally will unlock the door go up the steps then you will find raquza but he will fly away then go back to sootoplis and raquza will be fighting groudon and kyoger then he will fly away again go back to skypiller go up the steps using a mach bike to get over the cracks and ta da there is raquza.
shaba
get a good lvl pokemon i beat em all w/ raquza,lugia,entia,sweecoon,riocu,and lvl 1 ditto1 :)
u can get rayquaza in sky pillar i don't remember any route but its in the middel of the sea. u should have a Pokemon with hypnosis or sing and ultra balls. remember when u meet i rayquaza it will be in lv.70... oh! this is important save before u challange him if u kill him or beeing killed self u restart the game= a+b+start+select at the same time
cheater
After obtaining both Groudon & Kyogre in SS, you must show them to Prof. Oak and he will give you the Jade Orb that will allow you to get Rayquaza in the same place you got Groudon at.