The ending credits show actors' names to the side of mock-up yearbook pages featuring various characters from the movie.
The beginning credits show the main characters in cartoon form.
In the sing-a-long re-release, the Paramount logo from the 1970's is shown at the beginning featuring a blue background.
In the beginning, after John Travolta's credit, it shows a singer in a yellow suit. There's a quick blip where it says "Chlorophyll added" at 2:25.