Gregory Peck was the second choice for the role of Wilson Daniels.
As a kind of product placement for Walt Disney's associate publisher Dell, a character is seen reading a comic book of Uncle Scrooge 18. This issue, cover-dated June 1957, features the Carl Barks-written adventure "Land of the Pygmy Indians."
The first live-action feature comedy produced by Walt Disney.
The words Wilby Daniels recited from the ring to transform himself were "in canis corpore transmuto."