From the Super Mario Wiki
Luigi's Garden is a golf course featured in the game Mario Golf for the Nintendo 64. It is one of only two Mini-Golf courses in the game, the other being Peach's Castle. The Fairway has a green and white checkered pattern. The first nine holes are shaped as the digits 1 through 9, while the last nine holes resemble the letters A through I. There are also Bob-ombs and Bob-omb Buddies in the background.