A. Coz

A. Coz is a character in the Game Boy Color version of Mario Tennis. Unlike his partner, B. Coz, he is a speedy player and can return almost any ball. In Singles for the GBC Mario Tennis, the player faces him in the final round of the Island open. Like the player, it's his first time in the tournament. In Mario Tennis: Power Tour, which takes place several years later, he and B. Coz are revealed to be coaches at Factory. Their younger brother, Willy, is the player's final opponent in the Island Open in Mario Tennis: Power Tour.

Trivia

 * A. Coz's name comes from the french word a cause which practically means the same thing as because.