Dennis the Menace (1996)

'Dennis the Menace' (also known as 'Dennis & Gnasher')is a 1996 UK animated series based on the titular Beano comic character, a ten-year-old boy cauing mischief with his friends and his dog Gnasher. It should not to be confused with the identically named American newspaper comic strip character Dennis the Menace. The show lasted for two seasons with twenty-six episodes.

S1E11: The Secret Diary
When Dennis' Dad is thought to have been the naughtiest boy in the world as a kid, Dennis tries to win back his title by sabotaging a meeting Dad has with a Hollywood film director, first with frogs, and then by filling their clothes with water.