Suitably entertaining.
'The Million Dollar Duck' follows very similar steps as a lot of Disney's wacky comedies from around this era, it that regard it isn't anything particularly noteworthy. The writing to set up the events of this film is poor, it's incredibly manufactured.
However, as with most of these sorta films, it does produce enjoyable moments. That's helped by the casting, which Disney pick masterfully the vast majority of the time. Dean Jones always elevates a production upward, even if his performance here isn't one of his best. Tony Roberts is decent as Fred, though none of the others do all that much; not even Joe Flynn (Finley).
Nothing out of this world, but a good enough watch nonetheless.