First off, you have to have a DS/DSi Action Replay. (you can get them at Walmart/Target/Best Buy for about 20$ )
To do it manually, insert your Game into the Action Replay and turn on your DS. Then go to codes and it should say "Pokemon Diamond" then hit "Ok"; it should bring you to all the cheats it has for Diamond. To add a new code, simply hit "Add New Code", then enter the title of the code and then the actual code. The only problem with this, is that some codes are very, very VERY long, so the fastest way to do this is to hook your AR up to your PC with the USB chord and disk they give you. Hope this helped :]
No
you can't
You can't enter them in diamond. you have to buy an action replay and enter them in there
Get a cord.
You Get The Code On A Website And Get Your Action Replay Out And Enter The Code.-Starwest1
the same way you do in diamond and perl
dude you can't. not even with an action replay
if you look on youtube and type in Pokemon diamond(pearl) cheat codes and youlle find a lot of codes pause the video and write down the code then enter it on action replay if you look on youtube and type in Pokemon diamond(pearl) cheat codes and youlle find a lot of codes pause the video and write down the code then enter it on action replay
You will have to enter codes for every Pokemon sepeately, there is no code that gives you all of the at once
you input the code into the action replay and yeah
what u need 2 do is get ur action replay go to Pokemon diamond. then press add new code
If u want to enter cheats u need to go and buy a action replay. And to get a action replay u need to buy it at the mall or other places they sell it at. cost: $23.00 at the mall