I was all hyped up to extract sounds from PokéPark Wii, but it turned out to be a total disappointment in so many levels! :'(
This image should clarify some things up, like what that "0/0" -thingy is even suppose to represent, anyway? Does it represent the length of the voice sample?

Another thing, I can't even play voice samples from the original SSBB sound archive! I hope that within next version this issue is finally solved!