Megalomania is the battle theme for all of the chapter bosses. It also plays during the battle with the optional bosses Majin Ryunosuke in the feudal Japan chapter, "Secret Orders", and King Mammoth in the prehistoric chapter, "Contact".
This song is track 36 on the official soundtrack.
- English: Megalomania
- Japanese: ＭＥＧＡＬＯＭＡＮＩＡ