Original Soundtrack composed by: Michael Land, Barney Jones, Andy Newell and Patric Mundy
This is the theme that plays whenever Guybrush Threepwood's nemesis, the zombie pirate LeChuck, appears on the screen. I'm pretty sure the theme is used in just about every Monkey Island game in fact.
And now for some interesting trivia about LeChuck. Ron Gilbert, the creator of the character, was influenced by the characters in the novel "On Stranger Tides" - especially their heavy use of voodoo, which LeChuck loves so much. Also the "Chuck" portion of the name comes from a Lucasfilm general manager Steve Arnold who told Gilbert that he really liked the name Chuck and would like to see it appear in more games (Chuck the Plant anyone?)