He occasionally saves the world with his sisters' inventions. Their experiments often cause problems that he must resolve, and he must sometimes fight villains in the process. Johnny is often used as a test subject for his genius twin sisters' inventions and experiments, ranging from gadgets to superpowers. They reside in the fictional town of Porkbelly (either in the United States or Canada). The series revolves around the adventures of the title character, Johnny Test, an 11-year-old suburban boy who lives with his parents, his 'super-genius' 13-year-old twin sisters, Susan and Mary, who are scientists and best friends with each other, and a talking dog named Dukey. In Canada, the show premiered on Teletoon on September 3, 2006. The rest of the series aired on Cartoon Network starting on January 7, 2008, in the United States and internationally. It premiered on Kids' WB on September 17, 2005, which continued to air the series through its second and third seasons. Animation and later produced in Canada by Cookie Jar Entertainment. Johnny Test is an animated television series created by Scott Fellows, originally produced in the United States by Warner Bros. Cookie Jar Entertainment (seasons 2–6).