hackles on 17 February 2012
I have the same problems with online on 3DS. I don't think I have EVER successfully connected and finished an online Mario Kart 7 race.
Anyways, I've checked around online and I found this. Haven't tried it but I hope it helps.
http://www.ign.com/boards/threads/error-006-0612-for-mario-kart-7-here-is-the-fix.207270456/
