Defeat Uranus in stage 16 of survival mode. To make this easier, play as Kohryu and enable the "Beast mode", "No walls", and "No blocking" cheats. When the "Ready?" message appears, push them to the corner of the stage and step back. When the "Fight!" message appears, do Kohryu's projectile move (Down, Down/Forward, Forward, Beast). They will fly off for a ring out. Note: This will also unlock her stage.