There are numerous slapstick violence throughout this film, and a lot of them are humorous and made in a cartoonish style. It's an animated film for children anyway.
Characters get hurt or injured in a few occations, and even get a nosebleed sometimes, but become completely fine a few scenes later. Nothing graphic or serious, again these scenes are made humorous.
A man accidentally kicks a woman in the stomach.
A cat uses it's claws against a small alien creature.
There is a scene featuring some toy robots shooting each other with various weapons.
A small gang of boys attempt to bully a young boy. A chubby girl attacks one of the bullying boys and throws him like a bowling ball.
The violence in the climatic sequence tend to be dramatic sometimes, but on the other side have some humorous moments now and then.