Mario Tennis Aces[a] is a tennis game developed by Camelot Software Planning and published by Nintendo for the Nintendo Switch. The gameplay of Mario Tennis Aces consists of playing matches of tennis with various characters from the Super Mario series. Players can pick from Mario, Luigi, Wario, Peach, Blooper, Waluigi, Daisy, Rosalina, Yoshi, Donkey Kong, Bowser, Toad, Toadette, Chain Chomp, Bowser Jr., Boo, and Spike to play as. New characters will be added by participating in monthly tournaments, or will be added to the roster the following month if the player does not participate. Koopa Troopa was added in July. Similar in fashion to previous installments of the series, Aces incorporates many techniques, such as “topspins”, where the ball travels parallel to the direction hit, “slices”, where the ball curves to one side when hit, and “lobs”, where the ball travels upwards.
Aces adds several new mechanics to the Mario Tennis series. Using the motion controls of the Joy-Con, the player is able to initiate a “zone shot”, where the player can aim directly where the ball will go while the game enters a paused state.
The game also features an online multiplayer mode, where tournaments can be set up, as well as singular matches. This mode is also able to unlock additional outfits and characters. Another gameplay mode is “swing mode”, where players are able to swing the Joy-Con controllers to simulate hitting the ball with a tennis racket.