Hot Wheels Mario Kart Bowser's Castle Track (GNM22). Kids can race their Hot Wheels Mario Kart cars to overcome Mario Kart's worst enemy; Bowser! The races; lap flag and the remodeling of the track; make this set an exciting experience for kids. Kids have to avoid Bowser's punches; run around the bend and complete 5 laps to defeat their opponent winning the race. Includes a replica Yoshi vehicle.