Dr. Seuss Season 4


 * The Cat in the Hat
 * Mack the Turtle
 * Horton the Elephant
 * Joey (Sam-I-Am's Friend)
 * Norval the Fish
 * Sam-I-Am
 * Mr. Brown
 * The Lorax
 * Fox in Socks
 * Mr. Knox
 * Matthew Katroom
 * Jane Kangaroo
 * Morton the Elephant Bird
 * Nick
 * Prospector (from Toy Story 2)
 * Little Cat A
 * Little Cat B
 * Little Cat N
 * Little Cat Z
 * Little Cat H
 * Grandpa Jacob
 * Little Cat Y
 * Little Cat C
 * Goober
 * Buster (from Toy Story 2)
 * Scud (from Toy Story)
 * Sid (from Toy Story)
 * Mother Bird (from PD Eastman)
 * Zurg (from Toy Story 2)
 * Thomas (from TTTE)
 * Donald/Bill (from TTTE)
 * Madge (from TTTE)
 * Molly (from TTTE)
 * Thing 1 (does not speak)
 * Thing 2 (does not speak)
 * Thidwick the Big-Hearted Moose (does not speak)
 * Little Cat Fleep (does not speak)
 * Pam-I-Am (does not speak)
 * The Grinch (cameo, mentioned)
 * Picnic Bug (cameo)
 * Junior Kangaroo (cameo)
 * Lotso (from Toy Story 3) (cameo)
 * Percy (from TTTE) (cameo)
 * Oliver (from TTTE) (cameo)
 * Gordon (from TTTE) (cameo)
 * Stepney (from TTTE) (cameo)
 * Belle (from TTTE) (cameo)