Joining the new character reveals, details on a couple of Project X Zone gameplay systems have surfaced from Famitsu. The magazine details the game's Support Attack and Cross Hit systems.
Support Attacks are special attacks from your fellow party members. If another unit is in the vicinity (around 8 spaces) of your current unit, you'll be able to trigger a Support Attack from the other unit. The support unit will perform a followup attack which can only be used once in battle.
Cross Hit is related to Support Attacks. During a Support Attack, if the main unit and support unit strike the enemy simultaneously, you'll trigger a Cross Hit move. The enemy will freeze where the Cross Hit was performed, and you'll be able to more easily perform combos following this.