Clash) is an indifferent little cat who only speaks in fleeps. Terrence McBird (performed and voiced by Anthony Asbury) is a bird that joins the main cast in Season 2. He is the cats roommate, and is often grumpy throughout his daily activities in each episode until the end. Supporting The Grinch (performed and voiced by Anthony Asbury) – he appeared in How the Grinch Stole Christmas!. He likes to dampen other people's fun and pleasure for his own vile and sadistic amusement. He serves as the main antagonist of the series. Max the Dog (performed and voiced by Kathryn Mullen in Season 1 and Stephanie D'Abruzzo in Season 2) – he appeared in How the Grinch Stole Christmas!. Max is the Grinch's long-suffering yet loyal dog. Fox in Socks and Mr. Knox (performed and voiced by Bruce Lanoil in Season 1 and Tim Lagasse in Season 2 and John Kennedy respectively) – they came from Fox in Socks. Fox is lively and Knox is moody and easily annoyed. The only episode where Fox appeared without Knox is "The Sounds All Around". Yertle the Turtle (performed and voiced by Anthony Asbury) – Yertle is a turtle who tries to be king of anything, and usually uses other characters to his advantage. He serves as a major antagonist of the series, especially in season 1. Horton the Elephant (performed and voiced by John Kennedy) – he appeared in Horton Hatches the Egg and Horton Hears a Who!. He is a friendly, humble and steadfast elephant who often receives ridicule for believing in things that no one else does. Morton the Elephant-Bird (performed and voiced by Kathryn Mullen in Season 1 and Leslie Carrara-Rudolph in Season 2) is a Horton's half-bird son who appeared in Horton Hatches the Egg. Jane Kangaroo (performed and voiced by Stephanie D'Abruzzo) – she appeared in Horton Hears a Who!. She is a very snobbish and strict kangaroo who is portrayed in this series in a more sympathetic light than her book counterpart. Junior Kangaroo (performed and voiced by Kathryn Mullen in Season 1 and Tim Lagasse in Season 2) – he appeared in Horton Hears a Who! and is the son of Jane Kangaroo. By season 2, he and Morton have become friends. Thidwick the Big-Hearted Moose (performed and voiced by Anthony Asbury) is a moose who is very loving and sweet. In this show, Thidwick