Kart Fighter (Unl) is an unlicensed NES game featuring kart racing. Details on the developer or original release are scarce given its unlicensed nature.  Gameplay likely involves racing karts around tracks, potentially with power-ups and items affecting the competition.  Unlicensed games often replicated popular genres, in this case,  likely inspired by the success of kart racing games.

Kart Fighter (Unl)

Karnov (Japan)