Nintendo is planning to support Mario Tennis Aces long after launch. The recently-released Nintendo Switch game, which launched worldwide on June 22, is getting downloadable content (DLC) in the form of additional playable characters. Diddy Kong, Birdo and Koopa Paratroopa are among the athletes that will be joining the roster sometime in the fall. Nintendo has confirmed that the trio will be made available as free content. A more specific release window has yet to be announced, but stay tuned for any updates.