It is one of the four battle stages in Mario Kart 64. Block Fort has four large fortresses that are red, blue, green, and yellow. Each fortress has bridges that connect to other fortresses and the bridge on the top is longer than other bridges. There are a lot of Item Boxes on the lowest level and with the design of the stage, Green Shells can be a big nuisance as they bounce off the walls. Red Shells are considered to be useless since they home in on the higher enemy and crash.
Block Fort is one of 6 Battle Courses in Mario Kart DS and used for Balloon Battle and Shine Runners. It is the largest Battle Course in MK DS as it has multiple levels and 4 different colored block forts to fight on. Because the course is so big, it can sometimes be difficult to find your opponents. For that reason, Balloon Battles are known to last a long time on this stage.