For this to take effect, TWiLight Menu++ must be booted on the release date of the game.To celebrate the release of Sonic the Hedgehog on SEGA Genesis/MegaDrive, the TWLMenu++ splash screen now plays a jingle from the game!.Quality is the same as in prior versions which contained the music.The original DSi Menu music has been re-added!.If your custom skin still uses, it is recommended to switch over to bgm.wav.Audio file must be named, and goes in the same place as bgm.wav.Starting points for custom skin music are now supported!.
Check here on how to update TWi Light Menu++:
