You cannot. You need to trade
You'll need to either:Trade for it.Transfer it using the Poke Transfer.
it is rayqaza because all the new Pokemon are fake
Yes.
figuire it out yourself
Move deleter in lilycove
ya sure, but what are you going to give me? a rayqaza are you there?
You Find Him At the top of The Sky Pillar
you beat red and catch rayqaza
His attack can do 300 damage and has 230 HP.
You have to transfer from GBA via Pal Park.
You'll need to trade for it or migrate it to Pal Park.