At the very end of the credits, we can hear Astro saying, "RrI Rrove you, Rreorge."
While the beginning of the end credits play, stills from the movie are shown and afterwards, the words: "Dedicated to the memory of George O'Hanlon and Mel Blanc" (who both died in 1989, a year before the film's release) appear on a black starry background.