Looking for help unpacking Wwise .pck from Monopoly Streets (Wii)

[Pepperpot]

Hi all,
I'm looking to extract Wwise audio from some .pck files in Monopoly Streets' Wii files.
In particular I have been having trouble trying to extract audio from the file English(US).pck.

I have tried a bunch of different software trying to unpack it (wwiseutil, Ravioli Game Tools, Wwise Unpacker) but they all encounter different problems.
My end goal is to get it into a usable format like .wav or .ogg.
I'm not very familiar with the .pck file format so I apologise. I have used some of the bms scripts designed for .pck files but none of them seem to work.

Does anyone have any advice unpacking it?

[jonwil]

Got an example of one of these pck files?