A wimpy kid has delivered a knock-out punch to a band of warrior vixens at the weekend box office. The 20th Century Fox family sequel "Diary of a Wimpy Kid: Rodrick Rules" debuted as the No. 1 movie with $24.4 million, according to studio estimates Sunday. The girl-power action fantasy "Sucker Punch," released by Warner Bros., opened at No. 2 with $19 million.