What is a demangler? Some compilers encode information into the symbol name. Getting those information back in form of a readable function signature is demangling. Read the C part on Wikipedia. What is GHS? GHS is the Wii U's compiler. What is this even good for? It helps reverse engineering and developing for Wii U. Where do I download the application? Check the attachment below. Where do I get the source code? Here. How do I compile it? Using Visual Studio by opening the ghs-demangle.sln file and building the project. How do I use this? It's a command line application: Code: D:\Consoles\WiiU\Applications\PC\GHS Demangler\bin\Debug>ghs-demangle.exe ghs-demangle [OPTION].. [--] [FILE].. Demangles all symbols in FILE(s) to standard output. Error messages are displayed on standard error. Use "-" as file for standard input. --help Display this help message and exit. --version Display version message and exit. D:\Consoles\WiiU\Applications\PC\GHS Demangler\bin\Debug> To interactively demangle symbol names, you have to use the "-" command line argument: Code: ghs-demangle - ... followed by the symbol name from an RPL you want to demangle, for example: Code: R_StableSortSurfs_NonAuto__tm__43_26GfxSortCloudSurfsInterface12GfxCloudSurf__FPCZ2ZUiPZ2Z_Ui Result: Code: unsigned int R_StableSortSurfs_NonAuto<class Z1 = GfxSortCloudSurfsInterface, class Z2 = GfxCloudSurf>(Z2 const *, unsigned int, Z2 *) Awesome. The once "trashy and spammy" symbol name is now a useful function signature to work with. Also thanks to @NWPlayer123 for mentioning the interactive mode which is what you want to use.