Actor Allusion: When Bill Murray appears in the game, Swachkhammer confuses him with Dan Aykroyd. Murray and Aykroyd did the Ghostbusters movies together, which were directed by producer Ivan Reitman. Murray also mentions that Harold Ramis gave him a ride to the portal. Murray and Ramis also did Ghostbusters together, along with Stripes (also directed by Reitman) and Groundhog Day.
All-Star Cast: An odd case. Michael Jordan and a bunch of other basketball stars working with Bugs Bunny. Yeah.
Alternate Ending: The Junior Novelization has one, in which the Road Runner comes in and scores the second-to-last points of the game instead of Bill Murray.
What Could Have Been: Joe Alaskey said in an interview he initially expressed interest in voicing some of Looney Tunes for this film (or at the very least, provide Daffy's voice). But, despite the fact that Alaskey had several years of experience doing spot-on renditions of Mel Blanc's characters, producer Ivan Reitman kept making him audition several times, and flip-flopping back and forth as to whether or not he should be cast. Alaskey finally got fed up and said, "Look, either you want me, or you don't!" Alaskey didn't hear from Reitman again after that. In the end though, Alaskey admitted he was glad he wasn't involved in Space Jam after actually seeing the movie and realizing it was a terrible film.