Standard Switch ROM dumps are raw. A repack, however, uses advanced compression algorithms (like LZ4 or Zstandard) to reduce the file size without removing crucial game data. Here is why users specifically seek a repack for this title:
Assuming you have a legitimate Switch BIOS file (dumped from your own console) and a legal copy of the game, here is the installation workflow: xenoblade chronicles definitive edition rom repack
Because a repack often modifies how data is packed, you can tweak your emulator for better performance: Standard Switch ROM dumps are raw