Mario Kart XXL (Game Boy Advance Tech Demo) is a tech demo for the Game Boy Advance created by Denaris Entertainment Software for Nintendo in 2004. It was originally created as a non-Super Mario demo known as R3D-Demo before being repurposed.
The demo's only two music tracks are both ripped straight from the Europe-exclusive PlayStation racing game Moorhuhn Kart, albeit bitcrushed and higher pitched.