with this, it is possible that you could edit the save file, but this is different to (action replay) codes.
the 'code' function they show is similar to the stuff that some company did for ps3 'save' hacking.
like for house of the dead, you could load your save in it, and you can change your high score, and unlock all guns etc etc, but you cannot do stuff like infinite health, infinite time, never run out of ammo, etc.
it might be called 'action replay', but it does not use codes. (just like amazon kindle fire is not a 'real' kindle, it does not have an e-ink screen, bu people get confused)
using something like this, ideally it would be a bit like pokesav if they make it good enough, and if they do crack the pokemon save encryption.
but, like pokesav, you cannot make it so you walk through walls, you cannot make it that there is 100% capture rate, etc.