Battle Course 2 (GBA)
From the Super Mario Wiki
Battle Course 2 is the second battle course of Mario Kart: Super Circuit. It seems to appear in the same game's Bowser Castle 2, with the course's design similar to that of Bowser Castle 3 of the same game. The stage is predominantly square-shaped, with stone and mesh bridges, and several large lava trenches. Sometimes, it can be tricky trying to get into the middle of the course due to the number of jumps.