For the first handheld entry in the Mario Kart franchise, this game was amazing. It was also the first one to start introducing retro tracks/cups.
It was also a launch title for the GBA, if I remember correctly.
It is probably a little rough around the edges by modern standards, but I remember chucking hours into this.
Oh, it also introduced the rating system for performance in a cup. To this day, I have only managed one triple star in 50cc Mushroom Cup 🤣
It is on the list to revisit, but I am currently playing Mario Kart DS.