Super Mario Kart 8 V1.1 (PAL) has been released as a demake of Mario Kart 8 on the Wii U, scaling it down on to the original Super Mario Kart for the SNES. If you have downloaded the previous version of Super Mario Kart 8, it is probably the best time to download again and repatch.
The project started shortly after the first major course information was released and since then Sarger has been trying to squeeze some of the courses in the game down onto a SNES cartridge. The hack modifies all of the tracks in the game, including the battle tracks, modifies the point system and some of the graphics in the game have been modified as well.
Start your engines!

http://www.romhacking.net/hacks/2065/