Billionfold Studios (also known as Billionfold, Inc.) is Butch Hartman's production company. It has produced three television shows for Nickelodeon, The Fairly OddParents, Danny Phantom, and T.U.F.F. Puppy. The company also produced the film Doogal as well as Cartoon Network's "What A Cartoon!". The company's animation style is quite unique, as it appeared in every show they produce (thick outline around the character, and thin outline on the character). A similar animation style was used for the Big Time Rush music video: "Let's Stay in Our PJs".