you need the Pokemon modifier cheat
You catch Raquaza in the Sky Pillar on the island near Pacifilog City.
Catch raquaza
no just catch it in platnuim, peral, or diamond and trade it over to your soul silver
Sky Pillar
catch raquaza
no you cant get rayquaza
depending on the game there r certain Pokemon u cannot catch like say on emerald u cant catch palkia or dialga so on diamond u cant catch raquaza sorry
you can i think. i have to ask my friend again.
Unless you cheat it is impossible.
get heartgold beat it get kyogyre and get RAQUAZA
Not in Platinum but in HG/SS you can
Just keep pressing a in different patterns until you catch it