You must transfer them from ruby and sapphire they do that so its harder to get them and you buy their other games
you cannot catch the 3 in diamond or pearl.
you need to trade them from sapphire,emerald,and ruby(sorry)
you can but i don't know how yet
how do i get regirock
you need regice, regirock, and registeel in your team when you fight him
You can only get a regice, regirock, and a registeel by migrating them from ruby or Sapphire. If you migrtate these Pokemon you can also catch regigigas.
Regice: mt coronet exit regirock:sand storm place registeel: iron island order: Regirock regice registeel
Regice: Route 105 Regirock: Route 111 Registeel: Route 119
Regirock, Registeel, and Regice.
To get a Regirock, Regice or Registeel you have to migrate one from Ruby, Sapphire, Emerald, Leaf Green or Fire Red.
you don't need regigigas for registeel. you need reegisteel, regirock and regice for regigigas on Pokemon pearl or diamond
You can find Regigigas in Snowpoint Temple in Pokemon Diamond, you will need to bring Regice, Registeel and Regirock for Regigigas to waken.
No.
migrate regirock, regice, registeel, and then you can access the regigas (migrate from emerald, ruby, or sapphire)