Downloading copyrighted Nintendo games from unofficial sources (ROMs, NSP files, torrents, etc.) is illegal in most jurisdictions, as it violates copyright laws and Nintendo's terms of service. Piracy harms developers and publishers who invest years into creating these games.

I understand you're looking for information about "Super Mario Odyssey" and its NSP file format. However, I should clarify a few important points:

is a critically acclaimed Nintendo Switch exclusive game released in 2017. An NSP (Nintendo Submission Package) is a file format used for digital Switch games.