Clonus are monsters which copy your character's stats and skills, and are essentially a clone copy of your character player. Clonus appear during Chapters 2 and 8 during the story mode, and both must be defeated to advance the storyline at their respective points in the story. In Chapter 2, there is only one, and it will copy the player that is currently in the battle with it. In Chapter 8, each player character (Human and CPU) will have their own Clonus, and must defeat their own copy to advance. Defeating another player's Clonus does not allow you to advance.