1. beat the elite four
2. get national dex
just to letyouknow, the only ting that's in there is regigigas andyou cannot get himunless you have a regirock,regiice and a registeel in your party
you have to have the national Pokedex
You get it in the Snowpoint Temple.
You have to have regice, regirock and registeel. Then go to the snowpoint temple.
Regigigas is Pokemon #486 on Pokemon Platinum. To get it, go to the Snowpoint Temple with Regirock, Registeel, and Regice.
snowpoint temple
beat the elite 4 then go back to the boat
In Diamond and Pearl, it's called the Battle zone. In platinum, the battle frontier. First beat the Pokemon league. Then, back at home, (you will find out about a boat in snowpoint) go to snowpoint, and ride the ship.
you have to have regice,registeel,and regirock in your party then go to the snowpoint temple in snowpoint city and go all the way down to the bottom of the temple and regigigas will be there
Go to the cave in Celestic town,then go to the Snowpoint temple.
You have to travel through mt.coronet to get too snowpoint city.
go 2 snowpoint and find guy near a boat after you beat pokemon leage talk to him
get all 3 of the other regi's data in your pokedex, beat the snowpoint city gym, and go into the temple in snowpoint city