Yes. In order to unlock the regis, you will need dig. Its availible at the house of the man who's dug a big hole in the back of his home.
no
You don't need to go in any order.
no you do not just the Pokemon relicanth and wailord.
You need relicanth and wailord to catch the regis in sapphire/ruby/emerald. You cannot catch the three regis in platinum unless you have the event Regigigas (this event has now ended). If you have the special regigigas in your party, three new caves will open up in Sinnoh and you will be able to catch the three regis.
You can't; you can only get them in Pokemon ruby/sapphire and emerald. You'll need a gameshark code to get it in Pokemon fire red.
you can't catch them in platunim you will need to migrate the from ruby sapphire or emerald
No, they will need to be traded.
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 ^.^
no just go to him but i am talking about Pokemon emerald
you need an AR.
because relicath is a ancient Pokemon that holds a special ability that awaken the regis
You do not need a Wailord to catch a Registeel in Pokemon Emerald. You may need a Wailord or any other water-type Pokemon to surf to the place where you catch Registeel, but other than that, you don't need a Wailord.