http://forums.supercheats.com/topic.php?topic=52930
Thats the link to my forum that I made, basically it's not cheating because if you use the Action Replay, all you do is go into the Pokemon center, talk to the guy in the green suit, and he'll give u the Azure Flute.
The day has arrived where I put in my very own signature with Fiend Codes:
SSBB = 0259-0069-0106
Pokemon Diamond = 4596 9316 5087