Someone told me that you had to go to some kind of cave after you beat the Elite 4 I not that sure either.
to get regirock in Pokemon platinum, you have to upload it from ruby, Sapphire, or emerald.
RegiRock
You can only get Regirock by transferring a Regirock from Pokemon Ruby, Saphire, or Emerald to the Pal Park I believe.
you cant. you have to migrate them from Pokemon emerald
In Diamond you can't catch Regirock, you have to migrate it from Pokemon Ruby, Sapphire, or Emerald.
No, you need to trade it from Emerald.
Regirock, Regice, and Registeel.
no you can, you most catch it in Pokemon emerald
you can gain regirock by getting the national pokedex the going to pal park then transferring it from Pokemon ruby or emerald then cath it
there are three that you can CATCH in pokemon emerald its Groudon, Kyogre, and rayquaza regice registeal regirock litos lotias
Migrate it over from your Emerald game to Pal Park.
u have to migrate them from ruby Sapphire emerald