The official Just Dance 4 Special Edition was exclusive to the region. Its primary distinction from the standard edition is the inclusion of a bonus track that was already on the base tracklist for other regions and consoles: Exclusive Track : "Umbrella" by Rihanna ft. Jay-Z.
You are likely looking for the specific European version of Just Dance 4 to get the tracks on a Wii console, which requires the PAL-specific disc or file image. If you'd like more info on this, I can help with: Full Tracklists for the Special Edition vs. Standard. Wii Homebrew setup for running WBFS files. just dance 4 special edition paldwiiwbfs 2021