Enter , the surgical tool of the 3DS modding community. While it isn't a flashy game or a high-end emulator, it’s a vital piece of "digital first aid" that does one very specific job: fixing corrupted Mii Maker extdata. Why You Might Need It
file in the same folder as your game or in the emulator's main directory. : Open your emulator and run errfix.3dsx as if it were a game. Completion Errfix.3dsx