You cannot find Regigigas in Pokemon Black and White. You can obtain it by trading with someone who have Pokemon Diamond/Pearl/Platinum.
no you can't.
You can find Regigigas in Snowpoint Temple in Pokemon Diamond, you will need to bring Regice, Registeel and Regirock for Regigigas to waken.
I don't Know if your being serious but regigigas is a Pokemon created for Pokemon pearl and diamond.
You need to transfer it
You can't be cause Sapphire is a Generation III game and Regigigas is a Generation IV pokemon.
you cant get reggiggas in Pokemon emerald
No. Regigias is only available in in gen 4 and up. You can catch regigigas in Pokémon omega ruby and alpha sapphire
No you can't. The noob before me is dumb.
Pokemon Ranger was made before Regigigas, so there is no Regigigas on Pokemon Ranger.
You can only get the 3 regis and not regigigas. Regigigas is a newer pokemon.
In Cinnabar Island.
You cant catch it. You must trade or hack