Banson's Aria (Henry Hatsworth in the Puzzling Adventure)
Boss (Plok)
Gangplank Galleon (Donkey Kong Country)
Final Boss (Vectorman 2)
Final Showdown (Bully)
There many other songs I wanted to put in place of others but I wasn't 100% positive they played during a boss fight
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"Anybody interested in grabbing a couple of burgers and hittin' the cemetery?" -Royal
"Oh sure, walk to the sun"- Guybrush