Instructions
Use special attacks to jump on the Dark Star Core's head to damage both of its eyes. If you can break both of its red lens eyes, it will have a more difficult time attacking Mario and Luigi.
Attack the Dark Star Core's three black legs with hammer strikes or special attacks that hit multiple targets. The legs retract into the core's body at random, so special attacks that hit multiple targets are more effective against the Dark Star Core's tripod legs.
Finish off the Dark Star Core with jumping-based techniques when it sinks into the ground. Because the Core has been defeated doesn't mean the Dark Star is helpless. Dodge the Dark Star's brutal attacks and jump attack it at every available opportunity.
Punch Dark Bowser in the stomach five times as Bowser when the Dark Star is defeated. Destroying the Dark Star Core returns the game to the fight between the two Bowsers. Enjoy the ending to "Mario and Luigi: Bowser's Inside Story" now that both the Dark Star and Dark Bowser have been crushed.