What is the cheat code for Pokemon Diamond 100 percent catch rate?

you have to go on codejunkies, type in Pokemon diamond(or pearl, whatever you have)and look through it. it is the 999 masterball cheat. or you find the 493 masterball cheat. the 493 one is better, because you can automatically get a Pokemon.there are many other cheats on codejunkies.com, cheats that are so rad.See ya!

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If you want to use other pokeballs, i.e. luxury balls and the like, the code is:

9223c1f4 00002801

1223c1f4 00004280

d2000000 00000000

Note that, ATOW, I haven't tested this, though I did find this same code at several different sources; not that that necessarily guarantees anything. As is always the case with AR codes, use at your own risk.