Nintendo NY is hosting a Mario Tennis Aces competition on Saturday, June 30. The New York-based store will be giving away Mario Tennis Aces sweatbands as a free gift for participants. This offer is only available while supplies last, so be sure to get there on time! Mario Tennis Aces was released last week as a Nintendo Switch exclusive. In addition to supporting local and online multiplayer options, the game features an Adventure mode with a variety of missions and boss battles.