" Acorn Nuts & Diapey Butts " is a three-part episode of Rugrats that serves as the season finale to the show's sixth season . The episode's story serves as a lead-in to the events of Rugrats in Paris: The Movie , and it is also notably the last episode to use the original intro sequence which has been used since the series premiered in 1991.
Rugrats is an American animated children's television series created by Arlene Klasky , Gábor Csupó and Paul Germain for Nickelodeon . The show focuses on a group of toddlers , most prominently Tommy , Chuckie , twins Phil and Lil , and Angelica , and their day-to-day lives, usually involving common life experiences that become adventures in the babies' imaginations.   Adults in the series are almost always unaware of what the children are up to.