After just 12 days, Nintendo is already nuking Switch 2 console accounts for players caught using Mig Flash — popular cartridge allows Switch 1 games on the new console, but users say they're only using their own ROMs

A Nintendo Switch 2 console next to its box.

Various user reports suggest that Nintendo is actively issuing bans to Switch 2 consoles that have been used with the MIG Switch (now MIG Flash) flash cart. Several affected users have reached out on X (formerly Twitter) and Reddit, sharing accounts of their consoles being banned from using Nintendo's online services after using the device.

Despite earlier reports suggesting otherwise, MIG Flash (formerly MIG-Switch) showcased Nintendo Switch 1 ROMs running on Switch 2 hardware. This functionality is believed to be achieved through a recent firmware update, which mitigated or bypassed whatever new security checks Nintendo introduced with its latest console.