Jellystone! is an American animated comedy television series created and developed by C. H. Greenblatt for the streaming service HBO Max (currently known as Max). The series is produced by Warner Bros. Animation and features reimagined versions of various characters by Hanna-Barbera. It premiered on July 29, 2021, and ended on March 6, 2025. Below is a list of characters that appear in the show.

Jellystone Hospital Yogi Bear (voiced by Jeff Bergman) - A brown bear who is a doctor at Jellystone Hospital. He is self-assured, though a goofball. His first love is food, and crazy schemes will sometimes come into play in order to get his paws on some goodies. Originally from The Huckleberry Hound Show and subsequently The Yogi Bear Show. Boo Boo (voiced by C.H. Greenblatt) - A brown bear who is a nurse at Jellystone Hospital. He is Yogi's mild-mannered sidekick, legal spouse (for tax purposes), housemate, and best buddy. Though somewhat meek and less prone to wackiness, he is loyal to his more off-the-wall friends. Originally from The Huckleberry Hound Show and subsequently The Yogi Bear Show. Cindy Bear (voiced by Grace Helbig) - A brown bear who is a doctor at Jellystone Hospital and the town's only brilliant scientist. She completes the trio of hospital bears, at times acting as the team's take-charge leader. Unlike her original counterpart, she is intellectual and can invent machines. Originally from The Yogi Bear Show. Ranger Smith (voiced by Jeff Bergman) - The hospital administrator. Originally from The Huckleberry Hound Show and subsequently The Yogi Bear Show. Winsome Witch (voiced by Lesley Nicol) - A witch who runs the hospital cafeteria. Originally from The Secret Squirrel Show segment with the same name. Unlike her original counterpart, Winnie speaks with a British accent. Her role is significantly reduced in the third season to the point of having almost no speaking lines.

Jellystone City Hall Huckleberry Hound (voiced by Jim Conroy) - A Bluetick Coonhound who is the Mayor of Jellystone. Huck is laidback and simplistic - and simple-minded - in his approach to running Jellystone. The town's weekly chaos typically gets a calm reaction from Huckleberry. He was once friends with a cat called Cool Cat who loved Disco and almost destroyed the world with music. Originally from The Huckleberry Hound Show. Mr. Jinks (voiced by Jeff Bergman) - A cat who is Mayor Huckleberry Hound's personal assistant. Originally from the "Pixie and Dixie and Mr. Jinks" segment of The Huckleberry Hound Show. His relationship with Pixie and Dixie is unclear at the present. Snagglepuss (voiced by Dana Snyder) - An anthropomorphic pink cougar. He also works for Mayor Huckleberry Hound and serves as Jellystone's residential news anchor. He is sometimes mistaken for the Pink Panther. He also hosts different talk shows. Originally from The Quick Draw McGraw Show and The Yogi Bear Show.

Jellystone Elementary School El Kabong (voiced by Bernardo de Paula) - A horse and teacher at the school who doubles as the town's own guitar-wielding superhero. Originally from The Quick Draw McGraw Show. Unlike his original counterpart, he is Hispanic and remains in his superhero persona with no hint of an alter ego ever being revealed. Augie Doggie (voiced by Georgie Kidder) - An eager young pup who has a close relationship with her father, Doggie Daddy. Unlike her original counterpart, Augie is depicted as a girl in this show. Canonically 11 years old, or 132 months old, in the episode "My Doggie Dave". One of Augie's favorite father-daughter activities is exchanging fifty kisses. Her two best friends are Shag Rugg and Yakky Doodle. Augie's origins were revealed in the episode “The Big Stink” when her father explained why he was not effected by the Stink. Originally from the Augie Doggie and Doggie Daddy segment on The Quick Draw McGraw Show. Yakky Doodle (voiced by Katie Grober) - Originally from The Yogi Bear Show segment with the same name. Yakky is depicted as a little girl duck and no longer speaks like Donald Duck. She is an overly cautious worrywart and is best friends with Augie Doggie and Shag Rugg. Shag Rugg (voiced by Ron Funches) - One of The Hillbilly Bears, Shag is a cool brown bear cub with a penchant for hip lingo and fun, stylish life. Originally from The Hillbilly Bears segment on The Atom Ant Show. Ruff and Reddy (voiced by Oscar Reyez and Jakari Fraser) Originally from The Ruff and Reddy Show. Ruff and Reddy are depicted as a pair of robot kids as a reference to their first adventure in the show, who are a cat and a dog with a bit of a friendly rivalry. Lambsy Divey (voiced by Dana Snyder) - A young skateboarder lamb. The episode "Turn your Head and Trough" also reveals he's the head of a secret society called SPOON, and he holds a controlling interest in the utensils industry. Originally from the "It's the Wolf!" segment of Cattanooga Cats. Ding-a-Ling Wolf - A small wolf. Originally from the "Hokey Wolf" segment of The Huckleberry Hound Show. Caveman "Cavey" Jr. (voiced by Dana Snyder) - A young caveboy and Captain Caveman's son whom he discovers frozen in one of Jellystone's icecaps. Originally from the "Captain Caveman and Son" segment of The Flintstone Kids.

The Alley Top Cat (voiced by Thomas Lennon) - A cat who is the slick and conniving leader of the alley cats. He is often seen cooking up schemes to sucker the residents of Jellystone and pocket some quick cash with some of them going awry. Originally from Top Cat. Benny the Ball (voiced by C.H. Greenblatt) - A member of Top Cat's gang. He is also Top Cat's #1 gang member. The only cat members to not have sclera. Choo-Choo (voiced by Jenny Lorenzo) - A member of Top Cat's gang who is depicted as a girl in this show. She is the smartest and tends to land perfectly. Brain (voiced by Georgie Kidder) - A member of Top Cat's gang who retains more of a sarcastic tone and habit of using the word “like” in the middle of sentences (a trait previously attributed to Spook). Like Choo-Choo, she is also depicted as a girl in this show. Brain is also smarter than her original counterpart similar to Brain's portrayal in the Silver Age/Bronze Age comics. Fancy Fancy (voiced by Andrew Frankel) - A member of Top Cat's gang. He is less worried about getting into a relationship unlike his original counterpart. Spooky (voiced by Jenny Lorenzo) - A genderbent version of Spook who is now depicted as the gang's brainless and silent cook. Like Choo-Choo and Brain, she is also depicted as a girl in this show. Spooky is usually seen as an innocent person but judging by most scenes in the show she has a violent nature. Her closed mouth resembles that of the same mouth from Shnitzel, a character from Chowder. The King (voiced by Bernardo de Paula) - A cool, Fonzie-like lion who is a rival of Top Cat. Originally from the "Heyyy, It's the King!" segment of CB Bears. Big H - A hippopotamus and member of King's group who is depicted as a girl in this show. Clyde - An orange gorilla and member of King's group. Skids - A bucket-wearing alligator and member of King's group. In the series, Skids is depicted as female. Yuka Yuka - A hyena and member of King's group.

Jellystone Police Department Touché Turtle (voiced by Dana Snyder) - A terrapin fencer who is Jellystone's chief of police. Originally from the "Touche Turtle and Dum Dum" segment of The Hanna-Barbera New Cartoon Series. His sidekick from the classic cartoons, Dum Dum the sheepdog, is completely absent from the show and is replaced by fellow dogs Yippee, Yappee and Yahooey. Yippee, Yappee and Yahooey (voiced by Jim Conroy, Grace Helbig, and C.H. Greenblatt) - Three silly dog police officers who, like Touche, dress in Musketeer-style clothing and carry around swords. The episode "Lotions 11" reveals that Yahooey has two mothers. Originally from The Peter Potamus Show segment with the same name.

Jellystone Detective Agency The Jellystone Detective Agency operates in Jellystone's Detective District which is Jellystone's most black and white part of town.

Snooper and Blabber (voiced by Georgie Kidder and Bernando de Paula) - A cat and mouse detective duo. Originally from the "Snooper and Blabber" segment of The Quick Draw McGraw Show, Snooper here is depicted as female while Blabber retains being male with facial hair who speaks without a lisp. Undercover Elephant (voiced by Dana Snyder) - A pachyderm detective. Originally from the CB Bears segment with the same name. Like the show he came from, Undercover Elephant makes use of the disguises that do not work well. Inch High (voiced by Fajer Al-Kaisi) - A miniature private investigator. Originally from Inch High, Private Eye.

Town proprietors Magilla Gorilla (voiced by Paul F. Tompkins) - A gorilla who is the owner of a haberdashery called "Magilla's", which specializes in bow ties and hats. Originally from The Magilla Gorilla Show. Unlike his earlier counterpart, he is a fashion freak, seeing his clothing style as art, has a slighter lighter and wears a pair of glasses. He is also no longer obsessed with bananas. His high esteem for decor led him to join the secret society SPOON. Jabberjaw (voiced by Niccole Thurman) - A cheerful shark who is Magilla's star employee. She is the daughter of the original Jabberjaw (voiced by C.H. Greenblatt). She is mostly boy-crazy, with a readiness to please the male residents of Jellystone. The reason Jabberjaw pronounces her boss Magilla Gorilla's name as "Ma-JILL-a" is because Jabberjaw's voice actress, Niccole Thurman, initially did not know how to pronounce Magilla's name. The crew decided this fit Jabberjaw's personality and kept the pronunciation. Originally from Jabberjaw. Loopy De Loop (voiced by Ulka Simone Mohanty) - A French-Canadian fox-wolf hybrid who is Jabberjaw's coworker and friend. Like Jabberjaw, she is depicted as a girl. While her original counterpart displayed friendliness and do-good spirit, Loopy is often deadpan and sarcastic, often making such suggestions as burning down the clothing store. Originally from the Loopy De Loop theatrical short series. Doggie Daddy (voiced by C.H. Greenblatt) - Augie Doggie's father and an excitable helicopter canine parent who is the lighthouse keeper. Nothing makes Doggie Daddy happier than spending time with his daughter, whom he has a hard time leaving alone. He states that he has no sense of smell because he traded it to a singing sea hag for a daughter. Originally from the "Augie Doggie and Doggie Daddy" segment of The Quick Draw McGraw Show. Peter Potamus (voiced by C.H. Greenblatt) - A hippopotamus who is a lonely Otaku and martial arts enthusiast that spends time with his action figures (in lieu of actual friends). Other times, he tries to hang out with the other citizens. In the second season, his occupation was revealed to be a mail carrier for Jellystone's postal service with his balloon as his mode of transportation. Originally from The Peter Potamus Show. So-So (voiced by George Takei) - A monkey who originated in The Peter Potamus Show. So-So is rarely seen in Jellystone, but does appear as Peter's fight trainer in the episode "Jelly Wrestle Rumble". In the second season, he continues to work with Peter Potamus through the town's postal service. Squiddly Diddly (voiced by Niccole Thurman) - An octopus who is the proprietor of the music store. Squiddly is depicted as female and speaks with a valley girl accent. Originally from The Secret Squirrel Show segment with the same name. Shazzan (voiced by Fajer Al-Kaisi) - A jovial genie who is seen working a variety of vending jobs in Jellystone and also works a ticket seller at the Jellystone Theatre. In the third season, it is revealed that the reason that he works multiple jobs is to pay off his student debt. Originally from Shazzan.