Mario Kart 7 users can head on over to the eShop now to download the first ever 3DS patch for retail games. The patch in question brings several bugfixes and fixes for exploits in 3 of the games tracks. The tracks in question are Wuhu Island Loop, Wuhu Mountain Loop, and GBA Bowser Castle 1.
Users will be unable to play the game online untill they download the patch via eShop. To download the patch from the 3DS Menu simply activate the camera by holding L or R and scan the QR Code below. For more details check the Nintendo of Europe site: Here