GameSpot
[8.2/10] Reviewed by: Amer Ajami. "Whether you're an ardent fan of the Mario Kart series or a first-time player, Mario Kart Super Circuit is a must-have for owners of the Game Boy Advance." Also includes screen shots, reader reviews, and hints.
Mario Kart Super Circuit
Official Site. Contains information on the drivers, power-ups, hints, wallpaper downloads, and video game tester time trial times.