The Mario Tennis™ Aces game launches on June 22nd, but we're offering an early chance to polish your skills in the Pre-launch Online Tournament demo event featuring online tournament mode. Jump online and fight your way to the top of the in-game bracket in frenetic tennis matches. The more rivals you beat, the more points you will earn, which will unlock more playable characters in the demo. This event will only be active for the short time period between 6/1 and 6/3. By participating and keeping your save data, you can unlock Mario’s classic outfit in the full version of the game, once purchased, so don’t miss out!

To join, download the free demo from Nintendo eShop, and then launch the demo anytime during this time period.

Event Times
• 6/1 (Fri) 6:00 p.m. PDT - 6/3 (Sun) 11:59 p.m. PDT

More details on the official game page of Mario Tennis™ Aces Pre-launch Online Tournament ...