You need the 3 regis that are not in this game.
Once you have them all in your party, go to the temple at snowpoint.
You're supposed to beat the Elite 4 to be able to enter the temple.
You cannot catch it on Pokemon firered only on diamond pearl and thhe new one Pokemon platinum
mystery gift
1 in Pokemon Platinum Version
Have Regirock, Regiice, and Registeel in your party and go to the temple at Snowpoint City and complete the maze thingy. But the only way to get all 3 Regis is to transfer them to Pal Park from a gameboy Pokemon.
Get Regigegas from the giveaway and go into the cave on route 224
migrate regirock, regice, registeel, and then you can access the regigas (migrate from emerald, ruby, or sapphire)
In Pokemon emerald [the game I know it works with] you have to catch regice,regirock,and registeel and then migrate them from your Ds.
you have to have the three regis in your 6 Pokemon then go to snowpoint city go into the temple regigigas will be in there.hope this helps:)
You need to transfer all 3 of the regis from you ruby,sapphire, or Emeralds game packs
Go through ageis cave until you get to the pit then just beat up the stone Pokemon but leave Regigigas for last
you cant get a diamond on Pokemon pearl but you can get a pearl on diammond ...and pearl.
Pokemon no.147 in the Pokemon Pearl National Pokedex is Dratini.