The phrase you provided appears to be a common title or search term found on various ROM and emulation websites, where "NSP" refers to a specific file format used for Nintendo Switch games.
If you want, I can:
If you already own the game, dumping your own is a safe way to play on PC or Steam Deck. If you don’t own it, buy it . The game offers 15-20 hours of main content plus dozens more for completionists. Bowser’s Fury alone is worth the price as a glimpse into Mario’s future.
Periodically, a massive, tar-black version of Bowser (Fury Bowser) emerges from the ocean. When he appears:
A massive open-world hub filled with islands you can explore without loading screens.
“How Nintendo squeezed an open-world Mario inside a linear platformer’s engine — and why the Switch NSP version runs better than the Wii U original ever could.”