To make these costumes available to be bought at the Night Shop, meet these requirements : Note: All costumes must be purchased separately for Mio and Mayu.

Costumes	How to unlock
Black Stockings	Ghost List 79% (150+ ghosts)
Blue Bikini & Skirt (JP only)	View the Hellish Abyss Ending
Blue Bikini (JP only)	View the Frozen Butterfly Ending
Crimson Bikini & Skirt (JP only)	View the Hellish Abyss Ending
Crimson Bikini (JP only)	View the Frozen Butterfly Ending
Crimson Yukata	View the Shadow Festival Ending
Luigi (Mayu only)	View the Promise Ending
Mario (Mio only)	View the Promise Ending
Sakura Yukata	View the Shadow Festival Ending
Summer Uniform	View the Crimson Butterfly Ending
White Stockings	Ghost List 79% (150+ ghosts)