You Cant.
I think the only way to get Palkia in Pokemon Diamond is to use an Action Replay, GameShark, or trade it from Platinum or Pearl.
the only way to get mew on Pokemon diamond/pearl is cheat with an item such as an action replay or cheat on the gameboy advanced verions with an item such as gameshark then migerate.
You can only type in codes with a action replay or gameshark.
There isn't a gameshark for Pokemon pearl but you can get an action replay to put codes on.
roar.
Rayquaza isn't available for capture in Diamond or Pearl, but you may be able to get it through the GTS or if you have Emerald, than you can transfer it from your Emerald game.You can also use the action replay or gameshark
you need action replay or gameshark but action replay is better you need action replay or gameshark but action replay is better you need action replay
there isn't such a thing
Yes. There are cheat codes for Pokemon Diamond and Pearl. But, you must have an Action Replay or Gameshark. These devices can cheat for the game. A recommended site is called: supercheats.com/ They have cheat codes there. So, if you have a cheat device go to that site! There are other sites, look up Pokemon diamond and pearl AR(or any ther device) codes
trade diamond from Pokemon diamond onto Pokemon pearl
use action replay or gameshark
You trade Magmar from Pokemon pearl,diamond,or platinum to ether Pokemon pearl,diamond,or platinum.