Credits go to Kong K Rool*, Macrox, Tolos, DGenerateKane, HyperHacker, Viper187, and Kenobi for their "Secrets of Professional Gameshark Hacking" document, found here for being the foundation of information on this page. Some additions have been made to notice how the "v4" Gameshark disc actually behaves, as it does not seem to behave correctly with all code types as they are listed in the document, as the document was likely written with the Parallel port based cartridge Gamesharks in mind, and not the disc forms.