Nintendo has confirmed that Diddy Kong will be the next character to join Mario Tennis Aces. With those who take part in the online tournament from September 1st until the 30th first access to the DLC characters. Diddy Kong is classified as a speedy character, which means he uses speed above all to take control of the court. Mario Tennis Aces is now available for Nintendo Switch. We reviewed Mario Tennis Aces and gave it an 8.5, click here to find out why.