Wario Factory Court
From the Super Mario Wiki
Wario Factory Court is one of the default courts in Mario Power Tennis. It is somewhat based on Wario's WarioWare factory — judging by the picture of him in his WarioWare suit in the background. In normal mode, it is set on a group of conveyor belts that don't move. In the gimmick version of this court, the net has many across up and down-facing arrows. If someone hits it when hitting the ball, whichever direction is hit will be the direction the conveyor belt, on which the players stands on, moves. Bob-ombs can be seen watching the game and they will explode when someone gets a point. Wario Factory Court is also the setting for the Special Game Chain-Chomp Challenge, which also involved the conveyor belts as a gimmick.