Josh and his pals, after saving many mixed up, time-twisted worlds now find themselves in the center of the earth, in a cavern full of mushroom people. They call themselves the 'Shrooms, and Azabeth, mistakes them for a delicious treat from her planet and takes a huge bite out of one of the taller 'Shrooms, which poisons her, leaving her in a weak and disoriented state. Now it is up to Josh, Irwin, Prism, and new friend Porcini, the Italian 'Shroom, to find the cure to the mushroom disease and save Azabeth from certain death. The journey won't be easy, however, because they will face many challenges within the deep, dark caverns. Nightmare Hollow, which is off-limits to all of the 'Shrooms, is an especially dangerous part of the caverns, and just exactly where our lovable heroes must journey to. It is there that they will learn of the history of time itself and confront the most frightening foe yet...the Muncher!
This time, a cataclysmic temblor hits Los Angeles, turning it into an island. The president views the quake as a sign from above, expels Los Angeles from the country and makes it a penal colony for those found guilty of moral crimes.
When rogue stealth-fighter pilot Vic Deakins deliberately drops off the radar while on maneuvers, the Air Force ends up with two stolen nuclear warheads -- and Deakins's co-pilot, Riley Hale, is the military's only hope for getting them back.
When Ashtray (Shawn Wayans) moves to South Central L.A. to live with his father (who appears to be the same age he is) and grandmother (who likes to talk tough and smoke reefer), he falls in with his gang-banging cousin Loc Dog (Marlon Wayans), who along with the requisite pistols and Uzi carries a thermo-nuclear warhead for self-defense.
Legendary secrets are revealed as Aladdin and his friends—Jasmine, Abu, Carpet and, of course, the always entertaining Genie—face all sorts of terrifying threats and make some exciting last-minute escapes pursuing the King Of Thieves and his villainous crew.