yes it is possible, some people say you can only get it through an event or cheat device but there is a simple legitimate way.
1. migrate regice, registeel and regirock from ruby/sapphire/emerald OR trade for them using the gts and wifi.
2. put all three Pokemon in your party in alphabetical order BUT do not put them first in your party unless they are level 70+
3. go to the temple in snowpoint city, after the Pokemon league you should be granted access to this place (it might even be after the snowpoint gym, i cant remember :|)
4. get to the bottom floor and it will be standing in the middle (its about 20x the size of you so you shouldn't miss it) apparently sleeping, walk up to it and talk to it.
5. REGIGIGAS IS AWAKE :O it is lvl 70 so be prepared, take master balls or strong pkmn with a few timer balls and/or ultra/dusk balls. it is a normal type so fighting moves will be super effective against it.
You cant you have to get it from the GTS
look on youtube.com there is someguy that's will tell how to catch like everything hoyas rule
go to snowpoint big house front down ice stachu battle catch the reggigigas solve the riddle
There is no way. Regiggis was introduced in the Generation 4 games (R/S/E are generation 3 games)
regirock registeel regice regigigis
Regigigis can only be found on Pokemon Ranger: Shadows of Almia. As far as I know it is not on Pokemon Ranger 1. I played through the whole game and I never saw him on it. i have the handbook, you have to complete all of the quests and fill youre browser 100%
You have to catch all 266 Pokemon and then go to the ranger union with regice , regirock and registeel then you talk to someone and they say there is something happening in hippowdon temple go there and something will happen then battle regigigis. Be careful every step he takes there is going to be a seismic slam so capture him and you have all 267 Pokemon not including Dialga, Palkia and Shaymin the only way to get them is to use the ranger net and wait for the day to come and download the mission then you can get them too.
in Pokemon ranger shadows of almia... you have to defeat regigigis and finish all of the special missions
capture every Pokemon in the game and then at the ranger union they will tell u where 2 go to get regigigas.
First, you have to get all three regis, then you go in snowpoint temple, go to where the "statue" is and it will be a regigias. Finally just talk to it.
The legendary Pokemon are: Palkia,Dialga,Uxie,Mesprite,Azelf,Heatran,Regigigis,Shaymin,Darkrai,Arceus.
You must capture Regirock, Regice, and Registeel from Pokemon Ruby, Sapphire, and Emerald and migrate them or trade with your friends or go to the GTS.