Man's best friend is back in this canine take on "The Prince and the Pauper." Siblings Sara (Michaela Gallo) and Brennan (Joe Pichler) take boisterous Beethoven to obedience training and accidentally return with Michelangelo, an upper-crust pup who looks just like their dog. Meanwhile, Beethoven goes home with the rich Sedgewick family, who wonders why their well-mannered pet is suddenly acting like a beast.