Trivia: Because Robin Williams ad-libbed or improvised so many of his lines, the film was ruled ineligible for the Adapted Screenplay category at the Academy Awards.
Trivia: Reportedly, Disney chairman Jeffrey Katzenberg repeatedly tried to sabotage the film's production as he was worried it would overshadow their film "Aladdin," especially as both films featured Robin Williams as a prominent character. Williams was furious, as he felt the film's environmental message was important and that there was no reason he couldn't do both films. It's believed this may have been a factor in William's feud with Disney that lasted several years after "Aladdin" was released.