Dexter's Laboratory/Horton Hears A Who (2008)

Cast

 * Dexter's Dad as Horton
 * Tall Dexter as The Mayor of Who-ville
 * Mee Mee as Mrs. Quilingan
 * Dexter as Morton
 * Lalalvava as Kangaa
 * Dee Dee as Katie
 * Dexter's Mom as Sally
 * Lee Lee as Helen
 * Mandark as Vlad