The kids rescue Mr. Higgins after Mudsy has crashed into his farm by building a monster-mobile so they can win money in a cross-country race.

Mudsy and his friends spend a night in Michael Conway's weird mansion where they experience the "curse", an evil marsh monster.

Mudsy and the teenagers encounter Le Feet the Pirate, a beastly apparition, in a haunted Louisiana fortress just as their driver is ready to freeze them in ice.

The teenagers try to prevent the Chickenman from hijacking the supplies of the Chicken Delicious restaurants, which would force April's uncle into bankruptcy. In trying to snare the beastly bird, Mudsy is hijacked with a crate of frozen French fries.

Mudsy and the teenagers search for a descendent of Ichabod Crane and in the process encounter the Headless Horseman.

Mudsy and friends, driving cross-country in Mexico, meet Professor Lundgren in a pyramid where he discovered Montezuma's mask before it was stolen from him by an Aztec apparition. The treasure must be found or the professor will be charged with theft by his museum.