you cant. you must trade from pearl or migrate from s/r/e
Yes.
No.
you cant get all the regis only regigigas.
national pokedex
You have to have a special Regigigas from an event.
There Was Event Where You Go To Toys R Us And Recieve A Level 100 Regigigas After That The Regis(Regirock,Regice,And Registeel) Can Be Caught In Pokemon Platinum.
Regigigas is Pokemon #486 on Pokemon Platinum. To get it, go to the Snowpoint Temple with Regirock, Registeel, and Regice.
u cant.. only in platinum
i bleve so
get all of the regis in your party and bring the to that place where he is a statue to revive it
to find regigigas in Pokemon platinum you need to trade over the regis from another game and go to the bottom of snowpoint temple with the regis in your team. you will see a regigigas statue and it will come to life if you have the regis in your team.
get the three regis then go to tower at snow point and talk to the lady and she'll let you in ( make sure the regis are with you)