Complex sentence: The movie "The Addams Family" and its sequels made Wednesday somewhat older (around 12 years old) and her a much more serious personality with a deadpan wit and a morbid interest in trying to inflict harm upon her brother, Pugsley.
Split into simpler sentences: The movie "The Addams Family" and its sequels portray Wednesday as somewhat older (aproximately 12 years old) and with more malavolence than her previous appearance. Her attitude is very severe, with a deadpan wit and a morbid interest in trying to inflict harm upon her brother, Pugsley.