you use action replay but you need a cheat and the name of the items you want
the only way i know is to get Pokemon emerald and duplicate Pokemon holding rare candies(go to youtube to find out how)and migrate them to your game
Glue them on there.
You cannot clone Pokemon and items on diamond and pearl and platinum, but you can in emerald!
no you can't without an AR.
Get a life and get rares legitly.
its is super RARE
you cant.
action replay
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let me talk to my friend, he knows, I'll get back to you!
If you know how to duplicate Pokemon then put rare candies on them when you're about to duplicate. After take the rare candies away and keep doing that method until you got a lot of them (about 100 to 300 should be fine) then use the Rare Candy on the Pokemon you want to raise
you need ar not sure the code