If the error persists, move to Fix 2.
As of now, Mario & Luigi: Brothership has not officially released (expected 2024/2025). If you’re seeing this Title ID error, you may be running: Mario And Luigi Brothership -01006D0017F7A000--...
The error code Mario And Luigi Brothership -01006D0017F7A000--... is intimidating but almost always fixable without losing your save data. Start with —that alone resolves 70% of cases. If you reach Fix 4, invest in a new SD card; the old one is failing. If the error persists, move to Fix 2