I figured out how to equip a character with any skills and use the same character more than once in the team. This video shows how it looks like if Endou can use any types of skills. Currently I have no plan of releasing this hack, as it will mess up the game very easily. For the details of other hacks of mine, you can check its description: http://www.youtube.com/watch?v=UVL5pUMBGQs