Parappa the Rapper is a series of music & rhythm games created by Masaya Matsuura. The games follow Parappa the rapping puppy as well as Lammy the rocking guitar-playing lamb as they face a series of rhythm challenges from various rap masters, teachers, and instructors of various crafts (Parappa's driving lesson from Instructor Mooselini in the original Parappa the Rapper, for example).
The unique visual style of the series is given by Rodney Greenblat, an American graphic artist who is popular in Japan. Like in the Paper Mario series by Nintendo, all of the characters appear to be flat, two dimensional beings cut from paper while the surroundings are primarily three dimensional. According to Greenblat, the characters were hand-drawn and that they were made to look paper-flat to preserve the style of the artwork. The setting is a bright interpretation of an urban city, while the characters range from anthropomorphic animals such as frogs, spiders, and dogs, to lively versions of normally inanimate objects including onions, hammers, and flowers.