Super Mario Kart R

Super Mario Kart R is an early version of Nintendo's Mario Kart 64. Early copies of this game are few and far between as it wasn't available for retail release. However, through the use of the Stop N' Swop feature, some assets pertaining to Super Mario Kart R can be resurrected and placed inside Mario Kart 64, using the A.I. code still on the console's memory. Most features include altered racer profiles, a different title or title screen, music with different instrumentation (or new tracks entirely), an unlockable town track, and nrw characters

Magikoopa
The most notable change between Super Mario Kart R and Mario Kart 64 is the addition of a different character, Magikoopa (also known as Kamek), who was eventually replaced by Donkey Kong, and never returned to the series until Mario Kart Tour. His stats were the same as Donkey Kong's, despite his much different appearance.