How do I get the rare Pokemon in the ice temple in snowpoint city?

You must have all three Regis and the National Dex for this Hunt. The statue inside will not move until you have all three Regis in your party. Transfer Regirock, Regice, and Registeel to pal park. With them enter the Tepmple and head to the basement. Slide your way to the statue and save. Make sure you have MANY Ultra Balls and Dusk Balls. Talk to the statue, and it will come to life. You will end up in a battle with a Lv. 70 Regigigas.

To get the rare Pokemon in the snowpoint temple you need reggice reggirock and reggistell so get them from r/s/e and go to pal park

The rare Pokemon is Regigigas and to get it you must migrate Regirock,Regice,and Registeel to Pokemon Pearl and have them in your party. After that go to the temple.

The rare Pokemon is Regigigas. You get him by having all three of the Regis, that is Registeel, Regice, and Regirock from Saph, Ruby, or Emerald, on your team when you go into the temple. After making your way through the random ice puzzles throughout the temple, you'll make your way to the center and find Regigigas Lv70. It has an extremely low catch rate so Ultra Balls or, if at night, Dusk Balls, would be best

Good luck ^_^

--Destro

Migrate the Regis from Ruby, Sapphire, or Emerald and have them in your party when you fight Regigigas or you won't be able to fight him