Gideon, the criminally inclined cat who helps guide Pinocchio off the straight and narrow path, doesn't speak in the final cut of Pinocchio, but he did originally have a voice. Provided by the legendary Mel Blanc, Gideon's voice was deemed too distracting, so all of his dialogue was cut. Mel Blanc is heard on the final soundtrack, however; he provided one of Gideon's hiccups.
