We love Space Jam

The scuffed basketball used in the film is a treasured souvenir owned by director Joe Pytka. When held by Michael Jordan it is real, but whenever it is in flight or controlled by the cartoon characters it is animated.

When flying towards "Moron Mountain", the monolith from 2001: A Space Odyssey (1968) can be seen at the very right edge of the frame floating in space.

In order to fill up the audience from a limited selection of characters, one section was made from actual Loony Toons. The rest were simply replicated over and over and then "seated" next to each other to create the illusion of a full audience.

The gym where the Looney Tunes practice is called "Leon Schlesinger Gym" after Leon Schlesinger, the man who produced the first Looney Tunes and Merrie Melodies.

Noel Blanc (Mel Blanc's son) was originally booked to provide all of the regular Warner Brothers male cartoon characters' voices. But he and Warner Brothers couldn't agree on a contract, so the studio replaced Blanc with four other people to do the 12 male voices, instead of Blanc doing them all.

While praying in church for the return of his basketball skills, Charles Barkley says, "I'm never gonna go out with Madonna again." This refers to his own fling with Madonna (not Dennis Rodman's fling, as previously reported).

Michael Jordan actually wore his college basketball shorts under his Chicago Bulls uniform every game as a good luck charm.

A picture of Bosko, Warner Bros. first cartoon star, can be seen hanging on the wall of the meeting hall, in the scene where Yosemite Sam confronts the aliens.

Source: Internet Movie Database