Island Open

The Island Open is the big tournament in Mario Tennis and Mario Tennis: Power Tour. The tournament itself is divided into singles and doubles tournaments between the Academy, the Union, the Empire, and the Factory. In the Game Boy Color game, the amount of students from each school was uneven, but that was changed in the Game Boy Advance game.

Singles
Academy
 * Alex or Nina
 * Emily
 * Kevin
 * Mark

Union
 * Sammi
 * Sean

Empire
 * Elden
 * Ellis
 * Spike

Factory
 * A. Coz
 * B. Coz
 * Frank

Doubles
Academy
 * Alex/Nina and Harry/Kate
 * Kevin and Emily

Union
 * Sammi and Sean

Empire
 * Ellis and Edgar
 * Spike and Elden

Factory
 * A. Coz and B. Coz

Singles
Academy
 * Clay or Ace
 * Elroy
 * Whisker

Union
 * Chas
 * Leon
 * Mel

Empire
 * Barb
 * Dweezil
 * Mynx

Factory
 * Sass
 * Sheri
 * Willy

Doubles
Academy
 * Clay and Ace
 * Elroy and Tori

Union
 * Chas and Mel
 * Leon and Peter

Empire
 * Dweezil and Mynx
 * Barb and Oscar

Factory
 * Sass and Chet
 * Willy and Sheri