Initially, I was thinking about the Castle/Fortress theme for Yoshi's Island, but as the song continued, it felt like I was also being reminded of something else. I just can't pinpoint it. The beginning of the Puppet Master theme, perhaps? In a vain attempt to look up possible songs I might be thinking of, I found myself listening to the theme of Killer Klowns From Outer Space and watching a video about why an eagle-owl is a dangerous pet.
Is it safe to assume the Baron of this castle is a well-known teller of tall tales? Does his fight have you riding half-horses and flying cannonballs? There's a great movie about those stories, but I don't particularly know of a game that properly referenced them. A missed opportunity, if they haven't.
Now, if you would be so kind as to point my Smash main in the direction of DK Island. Duck Hunt and I have some avenging to do in your honour (and honor), Sir Brent "The Bertn" Bunn of year 1991.