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• Zooter (voiced by Janet James) is the series' protagonist. She is a pink pig whose name is a portmanteau of "zoom" or "zip" and "scooter". Zooter speaks with a British accent and is the jungle messenger. She also says the title of every episode.
• Ellyvan (voiced by Billy West) is a blue elephant van who carries the deliveries around the jungle. He is the biggest animal in the jungle and Zooter's best friend. His name is a compound word, albeit fictitious. He is able to suck improbable quantities of liquids up his trunk and spray them distances of up to half a mile or more. He speaks with an American accent.
• Bungo (voiced by Keith Wickham) is a yellow rabbit with brown ears, who loves to make signs and put them all over the jungle. He is very good at geography, and knows the jungle better than anyone. He is also the only wheeler that is good at jumping, being able to leap many times his own height into the air. Bungo, despite officially being a rabbit, has a long, raccoon-like tail with brown stripes as well. At the beginning of every episode, he carries a sign with the title of the episode. During the credits at the end of every episode in Season 1, he zooms up with signs and asks the viewers for help finding the right sign. Like Zooter, he speaks with a British accent. His catchphrase is "Oh, carrot sticks!"

Recurring

• Taxicrab (voiced by Jess Harnell) is a red crab that loves to dance and makes the greatest smoothies in the jungle. His name derives from a taxi cab, and he is the only wheeler that is able to drive sideways (possibly because of the "sideways walk", attributed to crabs). Despite the fact that Toadhog is often impatient, Taxicrab tolerates him the most. He speaks with a Jamaican accent.
• Carla (voiced by Laraine Newman) is an orange koala who owns a grocery shop. She appears in Season 1, but rarely doesn't in Season 2.
• Crocker (voiced by Keith Wickham) is a green crocodile, and a fire chief with a lisp who wears a yellow helmet with a red flashing light on top. He has some skill at gardening and knows how to make compost. His name comes from the phrase which is slang in the United Kingdom, used to describe many second hand cars.
• Hippobus (voiced by Amanda Symonds) is a yellow hippopotamus and school bus who usually carries The Beetlebugs to school. Her name derives from a Hippie Bus – usually a redecorated Volkswagen Bus. Like Taxicrab, she speaks with a Jamaican accent.
• The Beetlebugs are the junior wheelers. Their name and shape derives from a Volkswagen Beetle – cars that were nicknamed bugs. Their speech is mostly synchronized. There are five of them - a blue one, a red one, a green one, a yellow one and an orange one.
• Lance (voiced by Dee Bradley Baker) is a purple rhinoceros and an ambulance. His name is both a contraction of ambulance, and likely a reference to a weapon used by lancers who attacked with it at a full charge – much like a rhino attacks things by charging at them.
• Bobby (voiced by Jimmy Hibbert) is a toucan and a police chief. His character may be derived from a Bubble car – he even has the same three-wheeled chassis. His name is derived from the British slang word for police officers. He is the only Wheeler that can fly.
• Dozer (voiced by Keith Wickham) is a bull and a construction worker. His name and shape derive from a bulldozer, despite being a pun. His talent is digging and repairing roads with his dozer blade.
• Miss Jolly (voiced by Amanda Symonds) is a zebra and a school teacher. She is one of the oldest and wisest of the Wheelers. She is also the only one to wear glasses.
• Toadhog (voiced by Ron Orbach) is a grumpy green toad who likes worms and Fifi flies. He has a long, sticky tongue that can shoot out a long way to grab things. His name derives from the term "roadhog" – an inconsiderate or selfish motorist. He seems to be responsible for Jungle Junction's power supply – his water wheel powers the generator for all of the lights (including the traffic lights, in "Hiccup Power"), and he has a supplementary generator that is used to power the Zipsmas lights. He loses his patience with almost everyone except Taxicrab, mostly because Taxicrab is the most tolerant of him.

Series overview

The episodes are listed in order of production.

Season 1 (2009–2011)

Season 2 (2011–2012)

Christmas special

A Christmas special called "The Night Before Zipsmas" aired 5 December 2009 showing the wheelers getting ready for Christmas and trying to get to read the book "The Night Before Zipsmas". The other Christmas special was called "A Gift for Zooter" and aired the same day. It shows Ellyvan trying to find a gift for Zooter.