Ok here's what you do *IF* you have Windows XP:
1. Run the AR Code Manager
2. Go to the Piece of paper with the + symbol and click on it.
3. copy this:
http://www.freewebs.com/thelast1337/Pokemon_Diamond_jp.xml
and paste it into their.
4. Then link the the AR with the USB cable and the computer
5. Click ther the Pokemon Diamond JP tab beside Codejunkies.com
6. Make the "Unamed Codelist" extend (press the +)
7. Drag (Hold left-click and move) Pokemon Diamonf jp into where the codes IN your DS cartridge are shown and wait for it to finish and taa daa you have some sick codes some are:
Wild Shinys
Pokerus
Every Pokeball 100% catch rate
ALL events and Do them over (except manafi egg)
And every item Possible at 999
Do not use more than 3 codes because their is a
HIGH chance of mess up
but 2 or 3 is ok!
Hmph.
Nobody's gonna stand in my way.