To use a Just Dance 2023 WBFS file, your Wii must be "homebrewed." : Installed via exploits like LetterBomb.

However, the "Just Dance 2023 Wii" content you are seeing refers to fan-made mods

Modders take the engine from Just Dance 2020 (the last official Wii build) and painstakingly backport the songs, choreographies, and menus from the newer 2023 version released on Switch and PS5.

For the player holding a Wiimote in 2023, booting this file from a USB loader offers a surreal experience. It is a reminder that hardware doesn't necessarily have an expiration date if the community refuses to abandon it. While the official channels may have closed, the WBFS port proves that on the Nintendo Wii, the party isn't over until the modders say it is.