I would love a tutorial! I've never heard of this DDD program before
Not a problem! Here you go:
Dumping Splatoon:
Step 0: Make sure you have the Homebrew Launcher set up properly. If you don't have it set up yet, here is a thread explaining how to do so:
https://gbatemp.net/threads/homebrew-launcher-for-wiiu.416905/
Step 1: Download and extract DDD:
https://github.com/dimok789/ddd/releases/download/v0.3/ddd.v0.3.zip
Step 2: Download and extract TitleDumper:
https://github.com/dimok789/ddd/releases/download/v0.3/titledumper.win32.v0.4.zip
Step 3: Place the "wiiu" folder found within the extracted "ddd.v0.3" folder on the root of your SD card. Replace any files if asked.
Step 4: Create a folder on your PC to store the game dump. (For the sake of this tutorial, I will be naming my folder "Splatoon")
Step 4: Open a command window in the directory containing titledumper.exe. You can do this by holding shift and right clicking anywhere in the folder. After right clicking, click the option that says "Open command window here"
Step 5: In the command window, type
titledumper.exe /vol "path/to/folder" (Replace /path/to/folder with the actual location of the folder you want to dump the game to.) Here is an example of what should happen if everything is done correctly:
http://i.imgur.com/P9BKJpD.png
Step 6: On your Wii U, go to
http://loadiine.ovh and load the option that says "Homebrew Launcher 1.2 RC3 (5.3.2 - 5.4.0 - 5.5.0 - 5.5.1)"
Step 7: When the Homebrew Launcher loads, run DDD.
Step 8: Set the IP address in DDD you your computer's IPV4 address. You can find this by typing "ipconfig" into a command window.
Step 9: Press X to return to the Wii U menu
Step 10: Launch Splatoon. It will freeze on the loading screen. This means the game is dumping! You can monitor it's progress through the command window on your computer When it is done, the game will finish booting.
Step 11: Ensure that all the files dumped correctly. Your dump folder should contain approximately 759 Files and exactly 15 Folders. If you are missing any files, repeat steps 4-10 until it dumps the missing files.
Congrats! You just dumped Splatoon!