If my 3DS wasn't broken I would have so tried my darndest to get that code. Cause I do remember friending Sean on my 3DS.
But I have money now so I shall buy new 3DS and kick the ass when Smash comes out.
I have a question though, if I bought a new 3DS and put the SD Card from my old 3DS into the new one, would all of my stuff be saved? Like my Puzzleswap pieces, find Mii stuff...etc? What I am worried about is that the original Pokedex 3D (which is not available anymore I believe) was saved on the 3DS itself.