Mrtzcmp3 - Free mp3 Download
Use or CFG USB Loader .
is the current community standard, as it fixes many Project M 3.6 bugs and adds more content. Project Plus Project M ISO for USB Loader with Wi-Fi Compatibility
Most competitive players now use a method rather than building a custom ISO. This involves: Setting your clean Brawl ISO as the Default ISO in Dolphin.
Torrents with zero seeders, random YouTube links with bit.ly shorteners, and "Brawl ISO Builder" executables (often malware).