Mario was having a friendly tennis match with his local green-shelled friend, Koopa Troopa, playing on the grassy tennis court that was built right outside of Mario's house, in the front yard. Mario served the yellowish green ball, and smacked it towards the right. Koopa dashed as fast as he could and returned the ball smoothly. Mario grinned, and he simply padded the ball, watching it slowly bounce on Koopa's side. Koopa ran towards the net, but frowned as the Lakitu watching the game picked the ball up and tossed it to Mario, who caught it with his left hand.
As Mario served the ball again, this time towards the left, Koopa made the ball bounce high, causing the red-capped Italian American plumber to run towards the back of the grassy field. As Mario charged up his shot, he aimed towards the right, with Koopa running forward and simply padding it. Mario quickly pounced forward, managing to strike the ball into the air, but Koopa was swift and made a quick shot past Mario towards the right. Mario slapped his forehead as he received the ball again, and once more served it. As Koopa padded it slowly, Mario charged up, and smacked it into the air, with Koopa replying with a swift shot. Mario, however, managed to swiftly smack the ball towards the middle, accidentally hitting Koopa.
As Koopa rubbed his nose and shook his head, he prepared to smack the ball as Mario served it close to the middle. As Koopa whacked the ball, Mario swerved it towards the right, but Koopa retreated into his green-colored shell and smacked the ball upward. Mario jumped up into the air and smashed the ball downwards, bouncing over Koopa and started rolling slowly as Koopa lowered his head, shaking his head. Mario grinned, and he jumped over the net, to shake Koopa's hand and congratulate him for a good game. Koopa sighed, but he then smiled, and both he and Mario went inside to have a nice glass of orange juice, while the Lakitu grabbed the tennis ball and flew into the horizon.