How do I extract a RomFS file?

Extracting RomFS from an installed title
  1. Boot your console while holding (START) to launch Godmode9.
  2. Hold (R)+(A) while pointing to [A:] SYSNAND SD to open the drive options.
  3. Selct Search for titles.
  4. Press (A) to continue.
  5. Press (A) on the .tmd file of the game which you want to extract the RomFS from.
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How to dump game RomFS?

Right click on ACNH in the game list, and select Dump RomFS. Select Full and click OK. Wait for the dump to complete.
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How do I extract a mod file?

For MOD files with the ZIP file extension, you could unpack them with the standard Windows tool. Step 2: Open MOD file using the tool. a) In the following example, WinRAR is used for opening the MOD file. b) Click on the [Extract To] icon as shown below.
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What is a RomFS folder?

In computing, romfs (ROM filesystem) is an extremely simple file system lacking many features, intended for burning important files onto an EEPROM. It is available on Linux, and possibly other Unix-like systems.
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What is a RomFS switch?

In order to do basically any modding, you will need to dump the romfs folder from your current game. This is how to do that. The romFS is a folder filled with game files and configuration settings that Pokemon games use to set values, control pokemon behaviour, and a lot more.
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[TUTORIAL] How to extract romfs with a real 3DS

How to dump the RomFS of a switch game?

If you already have the game setup on a Switch emulator, you do not need to follow any of the steps with nxdumptool on your Switch. Right click the game in your emulator and: Extract data > Dump RomFS (Ryujinx)
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How to dump RomFS in Godmode9?

Extracting RomFS from an NDS game cartrige
  1. Insert your gamecart into your console.
  2. Boot your console while holding (START) to launch Godmode9.
  3. Navigate to [C:] GAMECART.
  4. Press (A) on the <titleid>.trim.nds file in the drive.
  5. Select NDS image options... , ...
  6. Press (A) to enter the drive.
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Where to put RomFS folder?

If the mod solely includes a romfs (and/or exefs folder), you will need to place that folder inside of sd:/atmosphere/contents/<title_id>/ . Note: The title ID folder has to be created manually in this case.
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How to extract 3ds game?

Dumping a Game Cartridge
  1. Press and hold (Start), and while holding (Start), power on your console. ...
  2. Navigate to [C:] GAMECART.
  3. Follow the steps applicable to your game cartridge: ...
  4. Select “Copy to 0:/gm9/out”
  5. Your non-installable .3ds or .nds formatted file will be outputted to the /gm9/out/ folder on your SD card.
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What is a LayeredFS file?

IFS LayeredFS is a modding engine for Konami arcade games that use libavs (which is basically everything in the last 15 years). It intercepts file accesses and replaces them with modded files in the data_mods folder, so mods don't have to be installed directly into the game folder.
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How do I extract custom ROM files?

The easiest way to extract rom is to run sudo rom-unzip in the rom folder and to wait about 10 minutes without using computer until you see your shell prompt.
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How do I unzip a file?

Do one of the following:
  1. To unzip a single file or folder, open the zipped folder, then drag the file or folder from the zipped folder to a new location.
  2. To unzip all the contents of the zipped folder, press and hold (or right-click) the folder, select Extract All..., and then follow the instructions.
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How do I extract a download file?

To decompress files
  1. Open File Explorer and find the compressed folder.
  2. To unzip the entire folder, right-click to select Extract All, and then follow the instructions. You can also select Extract All from the command ribbon.
  3. To decompress a single file or folder, double-click the compressed folder to open it.
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What is a game dump?

Dumping games is the act of taking a game from your system or gamecart and copying it into a readable format onto your SD card.
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Where can I find RomFS Ryujinx?

Right click the game > Open Mods Directory . Extract your mods here. Folder structure should be Ryujinx > mods > contents > [game ID] > [mod name] > exefs or romfs > mod files.
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How to install RomFS mods in yuzu?

Go to yuzu/sdmc or suyu/load and create a folder called ultimate. Open ultimate folder and create another folder called mods. On yuzu folder (or suyu folder), go to load/01006A800016E000 , create a new folder (name anything), and drag and drop romfs and exefs in there.
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How to rip 3DS games to PC?

Insert the SD card from the source system into your PC, and copy the whole Nintendo 3DS folder from the SD card to any location on the PC. Then, insert a blank microSD card into the PC, and copy that Nintendo 3DS folder from the PC to the microSD card. Please note: only blank microSD cards may be used.
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Why are 3DS ROMs called CIA?

CIA stands for CTR Importable Archive. This format allows the installation of titles to the 3DS.
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What is RomFS 3DS?

RomFS (or Read-Only Filesystem) is part of the NCCH format, and is used as external file storage. RomFS can be used: in conjunction with the ExeFS of a NCCH.
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Can I mod a switch emulator?

Switch Emu Mod Downloader. A Cross-Platform One-Click Games Mod Downloader for Switch emulators. Formerly known as YuzuModDownloader. Perfect for those who need to download Switch emulation enhancement/workaround mods for their dumped games.
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Can you mod ACNH on Switch?

If you don't own a computer powerful enough, you want to play with mods on-the-go, or just don't want to deal with the hassle of emulation, you can use a real Nintendo Switch to mod ACNH. This will go through the process of modding your Switch, and loading mods for ACNH.
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How do I add mods to Citra?

From Citra

Right click on the game you want to add mods into. Click on Open Mods Location . Paste the mod files inside that directory, each folder is stored by the TITLLEID of the game.
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Where to put 3DS ROMs on SD card?

Once installed, you should have a roms folder on the root directory of your SD card, and a subfolder named “nds”. Place your NDS ROMs in that folder, and your . sav files in the “saves” subfolder.
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What is 3DS FBI?

FBI is for downloading, installing, and managing files. Once a game is installed, the game will appear on your 3DS home screen as its own app.
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How to backup 3DS games?

You can create a backup of save data for compatible downloadable software. To back up save data, select a title on the HOME Menu, touch the arrow at the bottom of the Touch Screen, then select SAVE DATA BACKUP. To restore a backup, go to System Settings, then select DATA MANAGEMENT and SAVE DATA BACKUP.
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