It's Raining Cats and Dogs!
When Petey's clone shows up on Dog Man's doorstep, the super crime fighter takes him in. Of course, caring for a kitten capable of fixing robots takes some work, and when he is often late for work, Dog Man is glad to hire a nanny... who turns out to be Petey in disguise. Cat Kid gets sucked into Petey's evil plans even though he does not seem to have the same psychological make up as the evil super villain. When Dog Man's life becomes the subject of a Hollywood movie starring Italian actress Yolay Caprese, Petey is determined to sabotage it. With the help of reporter Sarah Hatoff and her menacing purse, Dog Man and Cat Kid manage to save the day.
Cat Kid, aside from being visually appealing, is a very complex creature, with a background he tries hard to overcome. He has modified his robot 80-HD, so that it does good rather than evil, and he agonizes when Petey compels him to jaywalk and commit other acts that are "bad". I liked the message that even though Cat Kid did bad things, he could still be a good person.
Dog Man is a book that never needs to be recommended, and readers who enjoy Pilkey's other work or Watson's Stick Dog and Stick Cat series will find Dog Man and Cat Kid to be a just-right mix of goofiness and existential angst.