|You're entitled to the "Boss Boss" Trophy, for defeating the Boss Bat, the Goblin King, Baron von Ratsworth, and the Bonerdagon, turned up to 11.
- All four bosses must be beaten at MC11 in a single ascension to qualify for the trophy, and it must then be purchased before ascending again.
- Even after Baron von Ratsworth was added to the Kingdom, it was a while before the text of the trophy was amended to include him. Up to June 2006, it was still possible to gain the trophy having beaten Baron von Ratsworth without the Super-Secret Canadian Mind-Control Device on 11.
- Getting this trophy is now possible in Bad Moon, as you can go to the Heartbreaker's hotel and go to the 11th floor.
- Getting this trophy is not possible in special challenge paths such as Heavy Rains or Actually Ed the Undying which replace any of the relevant bosses.
- The image filename, "dancing_in_the_dark.gif", is a reference to the song "Dancing in the Dark" by Bruce Springsteen, who is sometimes known by the nickname "The Boss".