Cheats and Hints

Cheat Code Central: Nintendo GameCube Codes
Provides cheats, hints, tips, and strategy guides.
http://www.cheatcc.com/gc/

Cheat Planet
GameCube cheats.
http://www.gamesradar.com/gc/cheats

Console Cheat Codes
Contains cheats and codes for the system.
http://www.consolecheatcodes.com/gamecube

GameCube Cheats
Contains cheats.
http://uk.geocities.com/benjaminmcmillan/

100% GameCube Cheats and Codes
Contains cheats and codes for the console.
http://www.cube-cheats.com

GameFAQs
GameCube cheats, faqs, walkthroughs, and message boards.
http://www.gamefaqs.com/console/gamecube/

IGN: GameCube Cheats
Cheats, codes, and hints.
http://cheats.ign.com/index/gamecube-cheats.html