No you cannot get the regis nor any hoenn Pokemon all must be traded to you from ruby, sapphire and emerald.
Trade someone with Ruby,Sapphire,and Emerald.
trade from emerald
you can't get the three regis but, if you have pokemon sapir\rubi\emerald version on the gameboy advance, you can tke the three regis through the pal park in route 221 (in south). *there are three caves that may be the caves of the three regis but i don't know what to do there.
All 3 must be traded from either ruby, sapphire or emerald.
Rayquaza, Kyrogre, Groudon, Latias or Latios, all three regis, and deoxys/jirachi if you can get them :P
No. You have to transfer them from your emerald game. If you get all three Regis and transfer them over, you unlock regigigas. He is in the snowpoint temple. You have to get the national pokedex before you can do any of this.
not necessary
All 3 of the Regis are level 40.
Migrate from Pokemon ruby emerald Sapphire
the only way you can get them is to have to have regigiga and the only way you can get him is to have the 3 regis and to get those you will need to have ruby, Sapphire or emerald and pal park so you can have 2 of each pretty cool right
not. you will have to migrate them from emerald