You cant enter cheats on Pokemon Diamond, the only is on a game shard or by mystery event maybe.
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
go to www.codejunkies.com and www.supercheats.com to find out AR Pokemon Diamond/Pearl codes for the DS
There is a sweet website called gamewinners.com that I go to for free video game cheats including pokemon.
Cheating with Action Replay. Go to a Pokemon event! - by imaier Cheats, trading, or migrating
events are special places you go so you can get shaymin darkrai arceus etc. where do you GO to enter events in Pokemon diamond?
go 2 this website http://www.cheatcc.com/ds/pokemonp.html
Yes, have cheats for Pokemon diamond on nogba. Download the copy of cheat code editor in this site WWW.R4DS.COM and go to open cheat database, and open a program called 'urscheat', then have millions of games for ds and go to a "+" in right of Pokemon diamond.
go to the old lady in battle tower in battle fonter and she make you enter codes.
Go to http://www.serebii.net/index2.shtmlv.Then find Diamond/Pearl.Then find the cheats.
If you have an action replay and you can read, you should know where to find them all! If you can't or don't, then I'll spell this really clear. GO TO WWW.CODEJUNKIES.COM TO GET ALL OF THE POKEMON DIAMOND ACTION REPLAY CHEATS.
realy go to gogle and type all Pokemon diamond action replay cheats there should be all the cheats all your questions will be answared and click the first link.
go to GameWinners.com. that's were i get all my shiny codes scroll down a little to get to the cheats. i hope you get what you nee.