It's been answered tybear.....You just dont like the answer. The 3DS ISNT hacked. the Action replay codes cannot be used on a 3DS game. The action replay can be used IN a 3DS handheld on a regular DS game title. (Any clearer this time?)
<Insert something profound here> FC : 5386-7219-3957
They must have been wrong then. And as of the newest 3DS update, the action replay won't work at all. I was warned of this before buying one from the shop's workers. They even let me try to be sure. The 3DS is incredibly hard to hack.