Ken Daurio's ("Bubble Boy," "Horton Hears a Who!") script and the story by animator Sergio Pablos owe a lot to Pixar's "Monsters, Inc.," where one half of some dueling 'bad' guys (Sulley and Mike, whose simple design seems like a prototype for Gru's minions, vs. Randall Boggs) are undone by a little girl (Boo, whom Agnes, the youngest here, is obviously modeled on) and "Up," where a cranky old guy ends up performing a mid-air rescue of a youngster who previously bugged him.