Specifically "Cleanup SD Card" or "Fix CMAC."

Don’t. You’ll corrupt the NAND. And I’d rather not die twice.

If Errfix.3dsx fails to resolve the issue, the glitch can be bypassed using alternative methods:

Always copy the entire contents of your SD card to your computer before running any system-fixing homebrew.

A long pause. Then:

You must have a way to boot into the Homebrew Launcher (usually via the Rosalina menu or a dedicated Homebrew Launcher CIA app).

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Are you having trouble with a specific , or are you just curious about how these "under-the-hood" tools work? How to Create a Mii on Nintendo 3DS Family Systems From the HOME Menu, select the Mii Maker icon and tap Open. Nintendo Support Troubleshooting (MSET9) - 3DS Hacks Guide

Place the errfix.3dsx file in the same directory as your Tomodachi Life game executable.

does anybody have a tomodachi life emulator with working textures?

The bottom screen turned into a mess of scrolling hex—readable text dissolving into machine code—and then, slowly, resolved into a single image: a low-res photo of a girl with a Game Boy, taken at some long-lost electronics expo. Grainy. Beautiful.