- Not to be confused with SaveMii for the Wii U, a save game manager
A SaveMii Dongle is a small piece of hardware that is meant to be placed into a GameCube memory port on the Wii to recover from some bricks. This chip mimics a real Nintendo recovery device, which is recognized by the System Menu on boot, instead booting directly to a disc.
The recovery menu can boot any disc whose title ID starts with 0 or 1. Most Wii games start with R or S, although the recovery menu can also perform disc updates from any disc.
Low-level brick warning
While this dongle itself does not have any bricking risk, updating past 4.2 on a pre-4.2 Wii has a risk of installing a corrupted boot2 and causing a low-level brick. Consoles that have an updated boot1 should not run into these issues.
To recover from a brick using SaveMii, first insert the dongle into memory card slot B. Once this is done, the Wii must be booted, leading to a screen with the System Menu version. If this fails, then SaveMii cannot fix the brick. If the menu can be reached, then there are a few options to recover.
If the Wii is on a version older than that on some disc, but on System Menu 3.0 or later, then that disc can be inserted to perform a system update and uncorrupt the System Menu.
If a drivechip is installed in the Wii, then Wii BootMe can be used to change the title ID of any game ISO to start with a 0. The new ISO can then be burned to a DVD, and once the game launches, Bluebomb can boot recovery software.
It was later discovered that the effect of SaveMii can be reproduced with a GameCube controller in the player 4 slot, by holding down all 4 directional buttons on boot. This usually requires the DPAD cover to be removed, but it is cheaper for GameCube controller owners.