I have a Theory.
If you have a Brawl ISO, open WiiScrubber and look into the VC GAME HA8E Partition.
Now grab a NES VC .WAD game. Now follow this tutorial until you get to the part where you extract the WAD.
Use U8Extractor to extract the 0000000#.app files. ( # is used to represent all the numbers. EX: 00000005.app)
Now go back to your ISO and the HA8E Partition, look in the content5 folder, the contents inside are almost exactly the same as the VC WAD! THis could be the start of Masterpiece hacking!