When you take of the game of the thing when the ds is still on and reinsert it you'll see green and pink lines that means.....
it's erasing data
That's the downside to buying action replays and gamesharks they can mess up you console or delete all of your saved codes.
All of the action replay codes are long because there are so many different codes and games. As a result the creators of the action replay has to make the codes very long so your action replay can identify the code.
same way as you do to all action replay codes
all of 'em
codejunkies.com
yes
you can acess the datel(action replay code company)'s data base with all codes at codejunkies.com (IMPORTANT there is no www. in front) (ALSO they dont have ALL codes because some of them are created by a action replay trainer[also made by datel])
NO IT ONLY UNLOCKS ALL ITEMS!
No Yes and you can find action replay codes for the action replay for heartgold ans soulsilver all over the internet.
you can not put a code on the action replay to play as kafei but then again you cant enter codes on the action replay at all.
There was a gba action replay that was released 3 years ago and u could not put codes on it. sorry.
you can do the mining museum trick you can check neoseeker for action replay codes