EX mode:
Successfully complete the game. Load the cleared saved file, then talk to the old 
man. The EX mode game has a higher difficulty setting, with new restrictions in 
each level. 

Unlock Extra costumes:
Successfully complete the game. Load the cleared saved file. Note: Do not enter 
EX mode yet. Talk to the costume woman and agree to help her. You will require 
the item that allows you to leave the maze in order to do this. Talk to the old man 
to start EX mode. There are various fabrics that you must find in the EX mode 
levels. Take them back to the costume woman to get a new costume. Each 
character has three different alternate costumes that can be found, based on 
Street Fighter and Vampire Savior. To get the final costume for each character, 
defeat the Boss on level 100 in EX mode.