Cast[]
- Elizabeth Hoover as The Cat in the Hat
- Mona as Mack the Turtle
- Herb as Horton the Elephant
- Troy McClure as Joey
- Marge as Sam-I-Am
- Janey Powell as Grandpa Abe Simpson
- Sideshow Mel as The Lorax
- Patty as Mr. Knox
- Selma as Fox in Socks
- Professor Frinks as Conrad
- Lyle Lanley as The Grinch
- Lou as Thing One
- Eddie as Thing Two
- Snake Jailbird as Jane Kangaroo
- Kent Brockman as Pam-I-Am
- Milhouse Van Houten as Nick
- Bart as Sarah Hall-Small
- Mr. Smithers as Little Cat Fleep
- Rodd Flanders as Little Cat A
- Todd Flanders as Little Cat B
- Jasper as Terrence McBird