
If you don't already have it, make a folder called 'hans' on the root of your SD, and then copy the build. Export the newly built RomFS with a name of the last 8 digits of the Title ID you were supposed to write down earlier and the extension of '.romfs'. (you need to open up SetupUS.exe, and then HackingToolkit3DS.exe, and in HackingToolkit3DS.exe type RFSB) Rebuild your RomFS using the RomFS Builder in Pack Hack. Go ahead and delete 'decompressed_code.bin' and copy 'code.bin' to somewhere safe. Your 'code.bin' has now been fixed so that colors display properly. Using 3DSTool, decompress the code using the following command in CMD:. Exit out of the RomFS entirely and move into the ExeFS. If you want to play DMG mode, leave the patch as is and exit. Decide now whether you want to play the game in DMG (Original Gameboy) mode or GBC (Gameboy Color) mode. Go to the very last patch at the bottom of the file. Go back to the root of the RomFS and open up the patch file in a text editor. If you're going to be using Pokemon Gold and Silver, listen closely. Delete whatever file is inside and replace it with the ROM you have from somewhere safe. Place the new '.patch' file from somewhere safe into the root of the RomFS. Delete all of the files in the root of the RomFS with the extension of '.patch'. Open up the extracted RomFS of your copy of Pokemon Red/Blue/Yellow/Green.
Rename the ROM to match the patch NOT INCLUDING the. Extract the appropriate patch and keep it somewhere safe with the ROM. (For example, if you're using the German version of Crystal, you'd find ''.) Locate the appropriate patch for your ROM, as well as for the language of your ROM. Download the VC Patch Pack linked above.
(GBC Pokemon game ROMs aren't too hard to find online nowadays ) Get yourself a ROM image of the game that you want to use the patch for, and then put it somewhere safe.