Find it at Cartoon City

Find it at Cartoon City is an 2D-CGI hybrid comedy film by Studio Blue and Two Third Hemm. It was released in theaters in the United States on May 2, 2003 by 20th Century Fox, Paramount Pictures and DreamWorks Pictures and in the United Kingdom on September 27, 2003

Synopsis
Tired of real life, a young Pete McKinley goes inside his drawings which take him into Cartoon City, but his sister Rachel is on his tail! He and the toons are in the aid of Travis Wilson