No
Yes and you can find action replay codes for the action replay for heartgold ans soulsilver all over the internet.
There is not a known Darkrai Action Replay Code for Pokemon HeartGold and SoulSilver yet.
you cant for heartgold or soulsilver suckers
Yes
buy it at the store
no, you can't duplicate unless you use action replay or pokesav
Trade them from HeartGold and SoulSilver.
Action replay or Nintendo events
If you have action replay you can get any Pokemon you want. This feature works only in Pokemon Heartgold , Soulsilver and Platinum.
you need action replay go to youtube to get the code
Cheat using an action replay
Step 1) Take out your action replay. Step 2) Problem Solved.
I dont know whether there is a no virus experience gain action replay code for heartgold and soulsilver