In 1993, Michael Jordan announces his retirement from professional basketball to follow his now-deceased father's career in baseball. Facing much less success, he is assigned a publicist/assistant, the bumbling Stan Podolak, to smooth the transition.
Elsewhere in outer space, an intergalactic amusement park named Moron Mountain is facing decline; its owner, Mr. Swackhammer, sends his diminutive minions, the Nerdlucks, to capture the Looney Tunes as new entertainment. They divebomb to the center of the earth, where the Looney Tunes' reality is hidden. Despite having powerful laser guns, the Nerdlucks are tricked into thinking that their prisoners have a chance to defend themselves; Bugs Bunny states that the challenge to decide their fates will be basketball (as the Nerdlucks are too small to play). The Nerdlucks steal the talents of NBA players Charles Barkley, Shawn Bradley, Patrick Ewing, Larry Johnson and Muggsy Bogues. The sudden incapacity of the five men leads to worldwide panic that results in the NBA season ending early. They try to restore their skills through practice, hospitalization, therapy and prayer, but to no avail. To intimidate the Looney Tunes, the Nerdlucks absorb the talent in front of them, transforming into monsters twice as large as them with dark basketball uniforms to which Sylvester dubs them the "Monstars". Bugs then realizes that they're going to need professional help.