A powerful developer plots to demolish Arnold's entire neighbourhood to build a huge shopping centre. Luckily, the diminutive youngster and pals are on hand to thwart the plan - aided by a superhero and a mysterious stranger. Animated adventure, with the voices of Spencer Klein, Francesca Smith, Jamil Walker Smith, Dan Castellaneta, Tress MacNeille, Paul Sorvino, Jennifer Jason Leigh and Christopher Lloyd