 Because he has Susan and Mary by his side, he can live any kid's dream, only to find that some dreams aren't worth living.He is very hyperactive, and often messes with his sisters' inventions, causing trouble and mayhem, but just as often proves himself to be extremely clever such as by frequently tricking his genius sisters or conquering the day from whatever goodness happens to show up.Johnny is also quite spoiled and stubborn, as he gets what he wants, through deceit, blackmail, or persuasion.