well pretty much what metalman said except it depends...on what u'll ask.so here we go,the action replay can do alot of things for ur game,it can lets say ill use MMBN5 Team Protoman for example b/c it was the game I used most recently,It can give u Infinite Zenny,It can make it so u have no random encounters,It can force fusions between mega and navis,even an awesome Bass/Mega fusion.It also depends on where u get the cheats from and how u use the cheats,the only game Ive ever bugged out with an action replay are,MMBN3 Whte pokemon Emerald and Pokemon Leaf Green,and so far no major or permaent glitches or bugs for MMBN4 or MMBN5 and a tip for you metalman,wait do you use an AR?If so just make sure you get them froma reliable site,and test them out before saving your game,most wont permanently affect your game until you save it(notice how I said most some can permanently ruin your game as soon as you activate them!)but test them out first and then turn the switch off to make sure if there are some errors/bugs that they leave when the AR is off!
-X
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