Only just got to attempt it just now, and i tried it for just dance 2015. The songs show up on the sd card archive section but when i transfer them over to wii memory they don't show up in the list and just eat up the storage. No idea why, Game and wii are both pal aswell :( Thanks for the help...
Sure, if you really want/"need" the highest quality there is you can grab remuxes. But will be pretty big file sizes, so disks can be better in that regard.
But piracy is free so...
some bluray rips are kinda crappy, remuxes are a more safe bet, but i usually don't have trouble finding a good rip, there are certain groups to avoid and some to look out for