Monster High Skulltimate Secrets -xci-.rar -

This appears to be a (XCI format) compressed in a RAR archive. XCI files are cartridge dumps, typically used with emulators (like Ryujinx or Yuzu) or custom firmware on a Switch.

It looks like you’re referring to a file named Monster High Skulltimate Secrets -XCI-.rar . Monster High Skulltimate Secrets -XCI-.rar