Block Fort appeared as a third course in Battle mode. There are four blocks in the game having four normal colors: strawberry-red, lemon-yellow, pear-green and sky-blue. There are also four small pale-black (possibly whitish-gray) bridges. Above the small bridges, there are extremely long, slender bridges. If you fall from the bridge, you could either fall on the block or the ice-gray floor with cocoa-brown bricks. There are also easy way to hit your foes. To do this, use bananas and fake item boxes on the bridge. Make sure you line up this item boxes horizontally without losing them by making contact with them. This lined-up items will attempt to block the bridge which can cause problems for your foes. Using shells is a disadvantage in this game because they could easily fall from a block or bridge and they hit tough bricked wall which will kill the shell. Green shells are immune to most walls although they can get died when they hit the wall.
Mario Kart DS
Block Fort also reappeared as a fifth battle stage in MKDS. There are no modificated differences but you can see the blocks changed their color. Red block is now pinkish-red, yellow block is pale banana yellow, blue is powder blue and green is peppermint green.