The .wbfs file format is optimized for the Wii, reducing the original game size by removing "junk data" (padding) found on physical discs.
: This edition features over 40 tracks, including "Uptown Funk" and "All About That Bass". Amazon.com or how to update your Just Dance 2016 - Wii : Ubisoft: Video Games - Amazon.com Just Dance 2016 Wii Wbfs