This one is a “duh” but it’s hard not to love our favorite red plumber in any of the spinoff games.
Since Mario is the alpha dog in the whole series, you also get to play as him during the game’s adventure mode.
But in regular matches against people he is an “all rounded” character where he’s not terrible special in any kind of category such as speed, defense, or tricky moves.
Not the greatest character to use during online matches, but I’ve won quite a few with Mario. He’s great for when you’re still learning how to master the tennis.