Battle Course 4 (GBA)
From the Super Mario Wiki
Battle Course 4 is the last battle course of Mario Kart: Super Circuit. It is set in the middle of Yoshi Desert, and consists of a square-shaped arena with a lot of sand and several deep pools of water that players can knock opponents into to remove their balloons. There are also triangular brick walls in the north and south of the course, which are used both as obstacles and to provide extra cover from attacks.