The Sega Saturn game "Sonic Jam" and the "Gems" port of the game have the anime introduction of this game but with different footage of Sonic reaching the Little Planet which is not in the Mega CD/Sega CD version.
All the music in the North American version was changed from the Japanese and European versions.
The 2011 port utilizes both the Japanese and American soundtracks, but instrumentallised the Japanese intro and ending songs.