Dark World bosses are the typical main boss (ruler of the Dark World), side bosses (either following the ruler or restricting access to some areas of the Dark World), and the extra bosses (recruitable, e.g., Spamton, Jevil). The boss fights in A0 are bullet hells similar to Touhou. There are Lightner bosses (e.g., Susie vs Kris and Noelle) in some Dark Worlds when some Lightners end up in the Dark World.