Here are the friend codes for the games I own. I can't seem to find my ACWW cartridge, but when I do I'll post that up to. PM me once you've added me and want to play a game!
Mario Kart DS
442443
462022
Tony Hawk's American Sk8land
309302
925482
Tetris DS
565465
041563
Metroid Prime Hunters
4982
8492
3461
I'm particularly eager to play a game of Sk8land and/or Tetris, because everyone I play with only wants to play MPH and MKDS, which I am also very willing to play. Anyway, PM me if you're interested and I'll get back to you as soon as I can!