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IOS 254 is commonly used for various purposes:
- BootMii as an IOS, is installed to this slot.
- PatchMii uses this as a temporary IOS.
- System Menu 3.4 included a copy of IOS9 as IOS254 to block PatchMii (and maybe to break some pirate tools), but Nintendo replaced the wrong IOS number, since most pirate tools use IOS249.
- System Menu 4.2 included a Stub IOS in this slot, in an attempt to overwrite BootMii/IOS, but if failed, because the version number wasn't high enough.
