In this thread, I will be teaching you how to dump a Wii U game's assets using DDD, a Wii U Title dumper by Dimok.
This is used for making SMM mods among other things.

What you need

- A Wii U capable of running the HBL
- The latest release of DDD
- The game you want to dump.

Steps

1. Disable the WiiU's Automatic Power-Down feature.
If you don't, the console will Shut-Down mid-dump, as the dump will take a few hours (800KBs to 1MBs)
2. Open a Command Line Prompt/Terminal on your PC.
3. Navigate to the folder where you have downloaded the launcher using the cd command.
4. Launch the Title Dumper.


5. On your Wii U, launch the homebrew launcher.
If you do not know how to launch the homebrew launcher, please follow the Wii U hacking guide
6. Launch the DDD application
7. Set your computer's IP address.
8. Press the X button to install ddd in memory and return to WiiU Menu.
You can also press A button instead to autoboot the inserted disc
9. Launch the title you want to dump. It will pause on the logo until the dump is done.
10. After the dump is done, the title will continue loading normally.

If everything went correctly, you should have dumped assets from the Wii U game you picked in the folder you set earlier.