» Cheat Code Central    Contains a strategy guide, cheats, and game shark codes. [Nintendo 64]    http://www.cheatcc.com/n64/mario_tennis.html

» Game Revolution    Includes cheats for the game. [Nintendo 64]    http://www.gamerevolution.com/oldsite/games/codes/n64/mario_tennis.htm

» GameSpot    Includes cheats for gameplay. [Nintendo 64]    http://www.gamespot.com/n64/sports/mariotennis/hints.html

» eLook    Quick summary of codes and cheats. [Game Boy Color]    http://www.elook.org/games/cheats/gbc/574.shtml