If you need help for anything regarding this tutorial, please join the RiiConnect24 Discord server (recommended) or e-mail us at [email protected].


LetterBomb is an exploit for the Wii that is triggered using the Wii Message Board.

What you need

  • An SD card formatted to FAT32/MS-DOS
  • A Wii on System Menu version 4.3


  1. On your Wii, go to Wii Settings -> Internet -> Console Information and make note of your MAC address.
  2. Visit please.hackmii.com, input your Wii MAC and region, ensure Bundle the HackMii Installer for me! is checked, and cut either wire.

HackMii Screen

  1. Extract the contents of the downloaded ZIP to the root of your SD card.
  2. Take out your SD card and insert it in your Wii.
    • The SD card must be inserted in the SD card slot located in the front of the Wii. Using a USB adapter plugged into the Wii’s USB port will not work.
  3. On your Wii, return to the Wii Menu and then open the Wii Message Board.
  4. Load the red letter with a bomb icon.
    • Ensure the date on your Wii is correct, otherwise you might be unable to find the letter.
    • In various scenarios, you may need to look at the previous or next day to find it.
    • If you don’t see the red letter, check if any errors appear in the SD card sections in Data Management. If any do, there may be an issue with the SD card format or the Wii’s SD card reader.
    • If your Wii freezes after clicking on the letter, you probably chose the wrong region when downloading the exploit. Redo Step 2 and select the correct region.

LetterBomb Wii Menu

Continue to Homebrew Channel and BootMii Installation