Mario Golf Super Rush "42" file?

[Random Talking Bush]

extract_42.py isn't in your .zip, I'm trying to run it myself with the one Ninji made for the base game version and it doesn't really work on 3.0.0 (it extracts the first 4 files before it gives up at dnk.ntpl)

Yeah that should be the one you'd be using (I didn't re-include it as it'd be redundant), and it's the same script I used to unpack v1.1.0, v2.0.0 and v3.0.0 respectively. But I'm not sure why it's not working for you, is your "42" file correct? Should be 3.27 GB (3,518,529,616 bytes) if it is the proper v3.0.0 archive.