It looks like Nintendo is planning to support Mario Tennis Aces long after launch. The upcoming Nintendo Switch game, which arrives this Friday, June 22,is getting downloadable content (DLC) in the form of additional playable characters. Diddy Kong, Birdo and Paratroopa are among the athletes that will be joining the roster in September. Nintendo will announce more details about DLC at a later date, so stay tuned for any updates. If you pre-purchase Mario Tennis Aces by June 21 at 11:59 p.m. ET, you’ll receive double the amount of Gold Points on My Nintendo.