The Pretty Piggies are a group of anthropomorphic pigs in flowered dresses. In the third verse, Harrison declares that piggies are "everywhere", leading "piggy lives". This features Angry Birds and Bad Piggies as playable characters or exclusive rewards featuring them. This is to advertise the new Rovio game, Bad Piggies. In June 2014, Rovio made "Bad Piggies" free-to-play, since it previously had a purchase price. Queenie's assistant, Muskrat McToady, would rather help the Piggies than the witch. He played guitar on the tracks Piggies and Helter Skelter. Lennon and Harrison were again occupied, supervising string overdubs for "Piggies" and "Glass Onion". As an anti-establishment song, "Piggies" recalls Harrison's "Revolver" composition "Taxman". Harrison wrote "Piggies" as an attack on greed and materialism in modern society. This incident introduced Reznor to their 1968 album, the "White Album", which included "Piggies". Pretty Piggies is a cartoon series distributed by Hallmark that was released 1990. In his 1980 autobiography, "I, Me, Mine", Harrison describes "Piggies" as a social commentary. Along with that, a new episode called "Bad Piggies" was released. Despite Thomas's enthusiasm for the new composition, Harrison chose to focus on "Piggies".