Supercheats.com is the best site
you have to purchase an action replay. then, you can type in Google.com and research Pokemon platinum action replay codes.
you can't
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yes
google it
You can google it
search platinum action replay codes then import the code to the action replay
Yes, there are several places you can find the random Pokemon Platinum Action Replay codes but http://codejunkies.com/ is the official place for your Action Replay codes. For anything not there, I would just use Google.
As of now, no action replay codes are reported for Pokemon Platinum.
Through an event or Action Replay codes
no
You can't.