It is broken or Heart Gold is Broken. That is one of the dangers of the AR.
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EDIT: IT IS NOT BROKEN DO NOT LISTEN TO THIS OTHER GUY (no offence lol)
It was a glitch with some HG/SS and the 2009 AR DS, it happened to me, and I found out a simple solution for it is HAVE A GBA GAME IN THE GBA SLOT and it WILL WORK.
so FIRST put a GBA game in the GBA slot
then insert the AR
then turn on DS
then insert Heartgold
and VOILA
it worked for me,
insert the action replay than take it out and put heart gold in.
yes at supercheats.com/pokemon heartgold action replay codes
Action replay otherwise NOsorry
Its Saving Somthing, I Donno What After You Insert It Insert The Game You Previously Inserted Then It Will Auto Start It
depends if you gets a action replay.
insert the action replay than take it out and put heart gold in.
No Yes and you can find action replay codes for the action replay for heartgold ans soulsilver all over the internet.
By buying the action replay game card.
you have to restart the action replay.
You cant even with action replay.
no
There's no Action Replay code for Zoroark in Pokemon HeartGold, because Zoroark does not exist in Pokemon HeartGold.
There is not a known Darkrai Action Replay Code for Pokemon HeartGold and SoulSilver yet.
no
get action replay
yes at supercheats.com/pokemon heartgold action replay codes
you cant for heartgold or soulsilver suckers