He is very hyperactive and often messes with his sisters' inventions, causing chaos throughout Porkbelly, but just as often proves himself to be extremely clever, such as by frequently tricking his genius sisters or saving the day from whatever danger happens to show up.
Johnny and Hugh have a complicated father-son relationship.
Johnny takes after his father, Hugh.
Johnny Test (character)
He even considered her the villain which was correct instead of her father.
Description: He never listens to his sisters' warnings, which oftentimes leads to problems in Porkbelly.