Could you clarify if you're looking for a of the update or technical instructions for the files?

It sounds like you're looking for information on , specifically related to the NSP file format or the 1.3.2 update . There are two likely directions for this:

You might be looking for a summary of what was added or fixed in the 1.3.2 update (which was the final major content patch adding characters like Bowser Jr. and Birdo).

You might be looking for a guide on how to install or manage the NSP/Update files for the game on a modified system.