no it is not possible
Regigigas requires all 3 of the other Regis to be present in order to be captured.
Sorry but you have to catch Regice, Registeel and Regirock in order to catch Regigigas.
Yes.
You have to have a special Regigigas from an event.
nothing. you catch them. what more can you ask then the regis'? don't be selfish! and you cant catch regigigas.
Yes, if you have the three Regis, you can go to Snowpoint Temple and catch it at level 70 in Diamond and Pearl and level 1 in Platinum.
You need relicanth and wailord to catch the regis in sapphire/ruby/emerald. You cannot catch the three regis in platinum unless you have the event Regigigas (this event has now ended). If you have the special regigigas in your party, three new caves will open up in Sinnoh and you will be able to catch the three regis.
You cant you can either use action replay which I recommend as you can get every Pokemon possible, or trade them over from a previous game.I think you can some how catch a Regigigas, Check that I KNOW you con catch a regigigas but I don't know how.
You cannot catch any of the Regis (Regirock, Regice, Registeel and Regigigas) in Pokémon HeartGold or SoulSilver.
you gotta get all regis for regigigas and the event for arceus is over.
Sorry dude, you can't get registeel in platinum without a cheat. But you can catch Regigigas in Platinum, but you'll need all three of the Regis to get him.
you can but you need 11 movie regigigas. if you have that you can go to some caves where the regis are. sorry i cant tell you EXACTLY where