Swackhammer, an evil alien theme park owner, needs a new attraction at Moron Mountain. When his gang, the Nerdlucks, heads to Earth to kidnap Bugs Bunny and the Looney Tunes, Bugs challenges them to a basketball game to determine their fate. The aliens agree, but they steal the powers of NBA basketball players, including Larry Bird and Charles Barkley - so Bugs gets some help from superstar Michael Jordan.
Following the death of his father, young Danny Madigan takes comfort in watching action movies featuring the indestructible Los Angeles cop Jack Slater. After being given a magic ticket by theater manager Nick, Danny is sucked into the screen and bonds with Slater. When evil fictional villain Benedict gets his hands on the ticket and enters the real world, Danny and Jack must follow and stop him.