Online Play

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In this section, we look at how to enable online play on Cemu. This involves dumping a set of online files from your Wii U to make Nintendo think that the connection from Cemu is actually coming from your console.

If you do not plan on using online services you may skip this page. Using Cemu online has not resulted in any bans to date.

After we’ve dumped the online files, you’ll be able to play with other Wii U and Cemu players on Nintendo’s official game servers.

To do this, we’re going to need to use a custom homebrew application to dump console files. This is done using an exploit in the Wii U browser.

As we will be connecting to real Nintendo servers, do not:

  • Use mods, cheats or hacks
  • Share your online files for other people to use
  • Play on both your console and Cemu at the same time
    • There have been no confirmed ban cases, but this may still be unsafe
    • Using the same account to play online will kick the other player offline

Doing any of these may get your console banned, restricting you from accessing online play temporarily or permanently.

Warning regarding reformatting or selling your Wii U Console:

  • Reformatting your console will result in your NNID being unlinked from that console. You will no longer be able to use online features on Cemu until you re-link your account to that console and re-obtain the files necessary for online play.

  • Selling your console (which is not permitted by Cemu because you technically do not own that data anymore,) will likely also result in the new owner reformatting the console or otherwise removing your account from the console. This will result in permanent loss of access.

If you want to play online with Cemu, keep your Wii U console.

Requirements

  • An SD card for homebrew

Your SD card must be formatted to FAT32 with 32KB (32768) allocation. For SD cards larger than 32GB, use FAT32 Format to format it correctly.

Downloads

Preparations

  1. Extract the Wii U Only.zip homebrew pack to the root of your SD card - SD:\
    • If prompted to, replace any pre-existing files
  2. Eject your SD card from Windows and put it into your Wii U console

Your SD card should look like this:

Dumping Files

Please ensure your NNID Password is being saved.

  1. On your Wii U, load up the account you are going to use online.
  2. To switch accounts, open the top-left avatar.
  3. After you’re on the correct account, open the top-left avatar once again.
  4. Scroll down and turn on the “Save password?” feature.

Not doing this will result in bad Online Files

Opening the Homebrew Launcher

  1. Turn on your Wii U console
  2. Launch the internet browser and open wiiuexploit.xyz
  3. Tap Run Homebrew Launcher!
    • If your console freezes for more than 10 seconds, hold down the Power button for 4 seconds and reboot
    • Once rebooted, reset the browser’s save data and try again

Using dumpling

  1. Run the dumpling app from the Homebrew Launcher
  2. Next, select Dump files to use Cemu online
  3. Change the desired dump destination and account accordingly
  4. Select Start to begin dumping
  5. Select Dump Wii U applications (e.g. Friend List, Browser etc.)
  6. Change the desired dump destination accordingly
  7. Select the Friend List to dump
  8. Select Start to begin dumping
  9. When finished, go back to the Dumpling main menu
  10. Exit the dumpling app
  11. When finished, turn off your Wii U

Copying the Online Files to Cemu

  1. Take your SD (and if used, your USB) out of your Wii U and put it in your PC
  2. Copy otp.bin and seeprom.bin from the /dumpling/Online Files folder to your Cemu directory
    • This is where Cemu.exe is located
  3. Copy the sys and usr folders from dumpling/Online Files/mlc01 on your SD/USB device to the mlc01 folder for Cemu
    • Overwrite any files if prompted

Adding the Friend List application

  1. Open the Cemu application
  2. On the top bar, select File -> Install game title, update or DLC
  3. Navigate to the dumpling/System Applications folder on your SD/USB device
  4. Enter the Friends List/meta application folder
  5. Select the meta.xml file

Enabling Online Mode

  1. Open the Cemu emulator
  2. On the top bar, go to Options -> General Settings
  3. Navigate to the Account tab
  4. Ensure you have read the text at the top of the page
  5. Check the box Enable online mode

Your Wii U should now be ready to go online. If you ever want to disable online features, simply uncheck the box Enable online mode.

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