From Zelda Wiki, the Zelda encyclopedia
Hacks are changes in the coding or variables within games to defy the game restrictions. Hacks can let the player do anything; which are not limited to changing the playable character(s) features, the design of the game, etc. Hacks can be done by using programs such as Action Replay and Gameshark, though there are other forms that modify the game directly. Fans have taken it upon themselves to hack the Wii with a different method. There are many hacks throughout the Legend of Zelda series which players can manipulate and these pages at Zelda Wiki aim to give easy to follow instructions of the code of each hack, the effect of each hack and video demonstrations. Please read the Hack Disclaimer Notes before attempting any of the hacks found throughout the site.
Note: Please be advised that Zelda Wiki is currently working on the hack pages, and that more information will become available on hacks as time progresses, including hacks in the spin off and associated games.