In Generation III: Catch a Wailord and a Relicanth, there some cave with Braille, read it, regirock, regice, and registeel will be there.
In Generattion IV: Take them to a certain city and regigigas will awaken.
I only know Regi rock,regi ice,regi stell and raquaza
To
There are four Regi pokemon. They are Regirock, Regice, Registeel, and Regigigas.
Braille, there is no language called "regi" , regi are the three legendary rock Pokemon and regigigas.
route 207
a regi cannot have a egg in any Pokemon game because they are nongendered
you cannot catch the 3 regi's in Pokemon platinum you have to catch them in Pokemon emerald then transfer them to Pokemon platinum. thnx
migrate
You can only get regi ice in sapphire,ruby,and emerald.
you cant you can only get regi rock regi ice and regi steel in Pokemon platinum when you have the national pokedex
Actually you're wrong you can NOT get the regis in Pokemon diamond, to get the regis you need Pokemon ruby/Sapphire/emerald you can get all three regis there(regi ice, regi steel, regi rock) althought if you migrate all of the regis onto Pokemon diamond you can get regi gigas(king regi) you will find him in the snowpoint temple after beating the elite four. Thanks hope i helped ^.^
migrate them from GBA Pokemon games