When Stanley comes into Michael's hotel room and says "C'mon, Michael, it's game time. Slip on your Hanes, lace up your Nikes, take your Wheaties and your Gatorade, and we'll grab a Big Mac on the way to the ballpark." All of those things were products that Michael Jordan had been a sponsor for around that time.
After Daffy suggests naming the team "the Ducks", Bugs asks "what kind of Mickey Mouse organization would name their team the Ducks?" This actually happened in 1993, when the Anaheim Ducks of the National Hockey League were established by The Walt Disney Company.
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).
Moron Mountain is a spoof on Magic Mountain, a Six Flags amusement park in southern California. At around the time this movie was made, Magic Mountain had a contract with Warner Brothers to use the Toon characters.
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.
In order to fill up the audience from a limited selection of characters, one section was made from actual Looney Tunes. The rest were simply replicated over and over and then "seated" next to each other to create the illusion of a full audience.
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.
The Monstars/Nerdlucks' names are Pound (orange one), Bang (green), Nawt (magenta), Bupkus (purple) and Blanko (blue). None of their names are mentioned in the film, and neither is the word "Nerdluck."
CASTLE THUNDER: First heard during a "film-within-a-film" for one second when Michael's kids are flipping through the TV channels and lightning appears on the screen. It's then briefly heard again for one second when the little aliens begin to transform.