Please make sure you have a proper NSP file extractor and a hacked switch or a Switch Emulator to play this NSP File
However, I must begin with a : Big Rumble Boxing: Creed Champions was never officially released for the Nintendo Switch . It launched on PlayStation 4, PlayStation 5, Xbox One, Xbox Series X|S, and PC (via Steam). There is no official eShop listing, cartridge, or NSP file for the Switch. Big Rumble Boxing- Creed Champions Switch NSP F...
It looks like you’re referencing a file title for a video game—specifically Big Rumble Boxing: Creed Champions for the Nintendo Switch, in NSP format (a file type associated with pirated or unofficial copies). Please make sure you have a proper NSP