The following list of features from Mario & Luigi: Bowser's Inside Story.
“The Dark Star is an extremely powerful and evil star seen in Mario and Luigi: Bowser's Inside...Dark Star
“Dark Fawful is a transformation of Fawful in Mario and Luigi: Bowser's Inside Story. He is...Dark Fawful
“Princess Peach's Castle is where Princess Peach lives and rules over the kingdom with her loyal...Princess Peach's Castle
“Spinies are small spike-shelled Koopas from the Mushroom Kingdom that appear in Mario & Luigi...Spiny