Cheats
there was a special event, but that was months ago...
To
You can only get regi ice in sapphire,ruby,and emerald.
I only know Regi rock,regi ice,regi stell and raquaza
route 207
you cant you can only get regi rock regi ice and regi steel in Pokemon platinum when you have the national pokedex
Sorry but you can't get them on Pokemon Platinum. You have to migrate regi rock regi steel and regi ice from eiter ruby or sapphire, ( idk about emerald) i hope i helped ;)
for regi rock it is in the desert for regi steel it is on route 120 for regi ice it is on route 105 hope that helps:P
you can i just don't know how to reggirock is on top of resort area
No, but another Regi exists in this game. Also in the game that is coming out (Pokemon Platinum) Regigas has a new form.
migrate it from ruby, sapphire, or emerald
get all 3 regi's. try hard to get regi gegis.