I agree to @Ritzman563 Captain underpants was create first, if you buy Dog man and Cat kid comics you can see it says "the creator of Captain Underpants" Dog man only can save the world by capturing Petey, and save save the day, meanwhile Captain Underpants can even beat Turbo toilet 2000, and save the world, by making Poopypants becoming famous in entire galaxies, so Captain underpants is more powerful.
George and Harold vs dog man ez win for George and Harold (in books) you see people think Melvin is just smarter then George and Harold but they are smarter‚ although Melvin has built amazing Machines but George and Harold couldn't be tested on there IQ with Quizzes and Assignments you see if there is any disgusting monsters trying to destroy the world there in nobody better than George and Harold look at book 6 even David pilky agrees