You can't. There is only one regi in pokemon diamond and pearl, Regigigas. But you have to have the other three before getting him. To get the three regi's you have to find them in either Pokemon Ruby, Saphire, and/ or Emerald and transfer them to Pokemon Diamond/ Pearl.
Not really that rare... in Pokemon Diamond you can find Sunkerns on Route 204
You cannot find a Charmander on Pokemon diamond. You have to get it from Pokemon Fire Red or Pokemon Leaf Green. Charmander is a starter Pokemon, so you don't have to catch it.
You can find the bestest,rarest, Pokemon is to go to www.marriland.com/pokemon
In "Diamond," you can find a trainer in the Victory Road that will have a Whiscash.
You cannot find the Pokemon Darkrai in Turnback Cave in the game Pokemon Diamond. Instead you can find him in Newmoon Island.
Unfortunately, you must migrate the regies from ruby or sapphire. You cannot catch them in pearl/diamond.
You need to trade them from a Gamboy advance game where you can catch them.
you cant. you have to trade them from Pokemon emraled.
If you want Regirock, Regice, and Registeel on Diamond, you'll need to trade from Platinum, or migrate from Ruby, Sapphire, or Emerald.
no
try the caves where you find the regies also there is a tower by dewford where you can find raquaza
yes its easy
their are no regies in pearl or diamond besides regigigs but u need the three regies to get him in the snowpoint temple.
You can find Pidey in a Pokemon Outbreak in Pokemon Diamond
you must trade them
You can't find it at Pokemon Pearl you have to Transfer it from the GBA Games Ruby/Sapphire/Emerald via Pal Park
Regirock, Regice, and Registeel (and for that matter, Regigigas) are unobtainable in Fire Red and Leaf Green.