Mario Tennis is a Mario Tennis game for the Nintendo 64. The whole game was games of tennis and it went on to produce the sequel Mario Power Tennis in 2004. This game was a milestone in Mario history because it marked the first appearance of the popular character Waluigi. Since then, Waluigi has made numerous appearances from Mario Kart: Double Dash!!, to Mario Party, to Super Smash Bros. Brawl. Mario Tennis has also helped create more Mario sports games with its popularity. It also marked the reappearances of Princess Daisy and Birdo.