This is the concept I have for Mario Table Tennis. It uses almost same controls as Metroid Prime hunters. You move the paddle about using the stylus and use the L button to strike the ball.
This idea came to my head after playing some pingpong with my gf. It'd be great if someone took this concept and made it into actual homebrew.
Items can be a number of things including rocket launcher to make the ball go faster in the next serve or something. This sticks to most of the mario games. I think item boxes should be on the table randomly and as the ball bounces off the table hits the item boxes