In the rock peak ruins with a regigigas in your party. You can battle it mutliple times.
its only in pokemon platinum
to get regirock in Pokemon platinum, you have to upload it from ruby, Sapphire, or emerald.
you can not get regirock in soul silver but in platinum you can in a special event.
you have to get him from pal park
they have videos on youyube of how to do it
You will find Regirock at rock peak ruins route 228.
level 30
you need REGIROCK, REGICE, AND REGISTEEL.
it is in route 228.
regeggias in snowpoint temple with regirock regiice and registeel on platinum only
no you do not.hope this helps:)
you cant. you have to migrate them from Pokemon emerald