A girl in the movie has some of her skin burned off by sunlight on two occasions.
The first battle has the most detailed violence in the entire movie. In it, large floating creatures move through a city, one conjures up a dark sphere that destroys part of a building where people were inside. Another one of these creatures is impaled on large sai-like weapons and then ripped in half, spewing blood onto the creature's would-be victims. Another of the creatures is shot point-blank by a laser beam and thrown through a building, prior to exploding into a bloody mess.
Most fights involving the robots have robots being pulled apart, shot with lasers, or cut by blades, and most of them explode after taking damage.
A young boy is shot in the abdomen. It isn't seen directly but the gunshot is heard and the boy is seen lying down with a trail of blood from his stomach.
Two characters are crushed against a wall by a robot component. The character's bloody limbs (still attached) can be seen protruding from behind the piece of the robot.
The character that was shot is seen later with a large blood stain on his shirt.
A very powerful weapon is fired, creating an explosion resembling a nuclear blast that creates enoemous tidal waves. It is implied that most of the planet is covered by the tidal waves.