Good luck finding those dev keys and bypassing the AP.I'm thinking about hacking it because I planed that and I want to
It's so easy the key is 00 00 00 00 00 00 00 00 Lol
(the Lol is included in the key, without it the 3DS will not accept the key)
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Honestly though, OP, if you're actually capable of hacking the device you wouldn't be posting shit like shud i get scds2 or haack teh 3Ds.
My guess is the OP thinks that everything will be there for him such as a way to make roms and channels and a loader and all he has to do is hit 'install' to call himself a hacker.
It wouldn't be that easy. You would need knowledge of how to make FPGA hardware, program it, and soldering in order to hack the 3DS currently. If the OP is capable, then go ahead and prove me wrong.
But if you really want to pirate 3DS games and save time instead of hacking, use Rydian's ROM Loader. It plays 3DS games and I've even checked it plays (some) on a DS Phat! The DS Phat 3DS game compatibility is low but a few games work well!