You have to trade them from ruby emerald and sapphireYou can only get those three after getting the national dex and by inserting ruby,sapphire or emerald on your GBA slot in your DS. After that go to Pal Park on route 221 on Pokemon Diamond or Pearl.
There is no way to send regice regirock and registeel from ranger to pearl. the only Pokemon that can be transferred from ranger to pearl is the manaphy egg.
there is not regice in pearl. but if you have ruby, emerald, or sapphire you could trade regice,regirock, and registeel to get rigigious.
its probably in another game you can do that
you need regice, regirock, and registeel from Saphire/Ruby/Emeraled
just bring regirock registeel and regice to regigias! regigias will be at lv70
you can only get it by Action Replay otherwise u cant
Regigigas is in the Snowpoint Temple but you need Regice,Regirock and Registeel in your team to awaken him
the Pokemon are regirock, registeel, and regice and you would have to migrare from an other game to get them.. i feel like a Pokemon freak!! : D
you need all regis (regice , regirock and registeel). When you have them in your party go to the snowpoint temple.
You can't... without Action Replay. I do not know a legit way to get Regice (along with Registeel and Regirock) The only Regi I know how to get legit is Regigigas, which needs Regirock Regice and Registeel. If you know a legit way to get Regirock Regice and Registeel, edit this answer. actually you can. all you have to do is send Pokemon from ruby, or Sapphire to dimond or pearl or platinum. then trade it to soul silver.
you don't need regigigas for registeel. you need reegisteel, regirock and regice for regigigas on Pokemon pearl or diamond
Have Regice, Regirock, and Registeel in your party. Go to snowpoint temple and "talk to it". It will awaken and you can battle and capture it.