The Powerpuff Girls Episode 21 - Sister Sitter Episode Title:Sister Sitter.Episode Description:Blossom and Bubbles come down with a case of spotted piglet fever, so the Professor gives them a combination of an antidote and a song. He then leaves Buttercup in charge of them, but her prevention from giving them the antidote/song combination causes Blossom and Bubbles to transform into giant warthogs. Eventually, Buttercup finally gives them the antidote/song combination, causing them to revert to normal.