A black Rayquaza is a shiny so you'll have to be very lucky for the Rayquaza you find to be shiny.
no only in emerald and heart gold/soulsilver or gold and silver
Raquaza (sorry if I mispeled that)
trade it from emerald or get a gameshark and get some code to get a raquaza
go to the sky pillar
Dragon and flying
No
Its raquaza. u can get him at sky pillar.
raquaza is a master legendary Pokemon in emerald ruby and Sapphire. his is most likely to be the best Pokemon in the series (Case in point)
The strongest Pokemon on Pokemon emerald would probley be raquaza
you have to migrate it from emerald,ruby or sapphire.
i would try the two methods recommended for getting a black charizard on diamond but if you do not have an emerald game or a diamond game then i have no answer
ruby=groudon+raquaza+latios+the regis sapphire=kyogre+raquaza+latias+the regis emerald=raquaza+groudon+kyogre+latios or latias+the regis