Mario Tennis is a sports video game series featuring characters from the Mario franchise. Players can choose from a variety of characters, each with unique abilities, to compete in tennis matches. The game includes different modes, such as singles and doubles, and various courts that affect gameplay. The series debuted in 2000 on the Nintendo 64 and has since been released on multiple platforms, including the Game Boy Color, Wii, and Nintendo Switch. It combines traditional tennis gameplay with power-ups and special moves, making it accessible and entertaining for players of all ages.