Modders create "60 FPS Patches." These are small pieces of code (usually in Gecko code format or contained within an IPS patch file ) that tell the game to update the screen twice for every logic cycle. This decouples the physics from the framerate, resulting in smooth 60 FPS gameplay while keeping the game speed normal.
Once you have found a legitimate (for a Gecko code), follow these steps:
: A comprehensive, crowdsourced list of codes for various GameCube and Wii titles.