Luigi's Mansion Court
From the Super Mario Wiki
Luigi's Mansion Court is a default court in Mario Power Tennis which is based off Luigi's Mansion, and is it set outside the mansion. There are numerous ghosts watching the game. In the normal version of this court, it is set on a concrete field, with no real gimmicks in it. In the gimmick version, on occasion, a ghost appears on either side of the court and can harass the players. This slows them down, making it more difficult to move and hit the ball at the right time. However, if a player lands the ball onto the mid-back space on the court (which has a picture of a light bulb on it), all the ghosts on the other side of the court disappear. The minigame Terror Tennis is also held on this court.