You can fight in the battle tower, catch the three regis, search for latios/latias, or in emerald you can catch groudon and kyogre
You catch Raquaza in the Sky Pillar on the island near Pacifilog City.
Catch raquaza
Sky Pillar
no you cant get rayquaza
catch raquaza
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
Unless you cheat it is impossible.
you can i think. i have to ask my friend again.
you need the Pokemon modifier cheat
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