Supporting characters
Fall Apart Rabbit (voiced by Frank Welker) is Bonkers' clumsy best friend and stunt-double back during Bonkers' Hollywood days. He literally falls apart at the drop of a hat and must wear bandages over various body parts to keep himself from dismantling. By the episode "New Partners on the Black", Fall Apart Rabbit travels with the Piquel family.
Fawn Deer (voiced by Nancy Cartwright) is Bonkers' main love interest and co-star when he was a cartoon star. Bonkers is willing to do just about anything to please and impress her. Fawn reciprocates his love for her, having kissed him on numerous occasions.
Detective Lucky Shirley Piquel (voiced by Jim Cummings) is a police detective and Bonkers' main partner. He is a serious, hard-boiled detective whose by-the-book nature is at odds with Bonkers' decidedly more maniacal approach to crime solving. By "New Partners on the Block", he was offered an FBI job in Washington DC and leaves with his family, Toots, Police Light, and Fall Apart Rabbit
Marilyn Piquel (voiced by Sherry Lynn) is Lucky's child genius daughter. She is an aspiring artist as well as a script/story writer and has deep connection to toons such as Bonkers, with her favorite toon being TV star Skunky Skunk. She is more than capable of taking care of herself and aids her father in a number of his cases often being the words of wisdom or a source of knowledge to Lucky.
Dilandra "Dyl" Piquel (voiced by April Winchell) is Lucky's understanding wife who supports her husband and at times encourages their daughter Marilyn.
Officer Miranda Wright (voiced by Karla DeVito) is a police officer who works at the same police station as Lucky. While originally seen as a Kanifky's secretary in "Hear No Bonkers, See No Bonkers", she becomes Bonkers' second partner by "New Partners on the Block" and tolerates his antics. Her name is a play on Miranda rights.
Shirley Wright (voiced by Erin Gray) is a news reporter and Miranda's older sister.
Timmy Wright (voiced by Dana Hill) is the troublesome nephew of Miranda Wright, who Bonkers babysits.
Leonard Kanifky (voiced by Earl Boen) is the absent-minded chief of police and is the boss of Bonkers, Lucky, and those that work at the Los Angeles Police Department. While absent for most of season two, he did appear in "Cartoon Cornered".
Sergeant Francis Q. Grating (voiced by Ron Perlman) is a police sergeant and the boss of Bonkers and Miranda who also answers to Kanifky. He is often driven crazy by Bonkers since meeting him in "New Partners on the Block", causing him to dislike toons in general and occasionally throw Bonkers out of his office. Though he mellowed down by "Cartoon Cornered" after Bonkers saved his life
Jitters A. Dog (voiced by Jeff Bennett) – A small, nervous dog who is Bonkers's friend and one of his sidekicks. His role in the series was of the straight man, constantly having serious bodily harm done to him through Bonkers' recklessness. His catchphrase, in reference to this, is "I hate my life".
Grumbles Grizzly (voiced by Rodger Bumpass) – A grizzly bear who was Bonkers' strict boss or, sometimes, arch-enemy in "He's Bonkers" shorts. He later became his neighbor.
The Mad Hatter and March Hare – Appearing from Disney's Alice in Wonderland, the Mad Hatter (voiced by Corey Burton) and March Hare (voiced by Jesse Corti) make three appearances in the show. They live in the Hollywood Sign.
Toots (voiced by Frank Welker) – Bonkers' pet horn, appearing only in the "Lucky Episodes", including New Partners on the Block. He likes to help Bonkers and Lucky in their cases and always sits on Lucky's office chair.
Police Light (voiced by Charlie Adler) – A toon police light who likes music and dance.
Broderick (voiced by Frank Welker) – The toon radio whose sounds sounds like a real police radio. He appears only in the "Lucky Episodes".
Harry the Handbag (voiced by Frank Welker) – A deeply troubled toon who captured and stored objects and people inside of himself in a misguided belief that it would end his loneliness.
Tiny (voiced by Charlie Adler) – A huge but polite hamster who stayed at Lucky's house to hide from a scary shadow, which turns out to be his old friend Mr. Big.
Pops Clock (voiced by Stuart Pankin) – A toon timekeeper who was angered that nobody appreciated him for his work.
Skunky Skunk (voiced by S. Scott Bullock) – A favorite toon TV star of Marilyn Piquel who was framed for manslaughter by an embittered celebrity chef, who then tried to arrange a "fatal accident" for him.
Professor Ludwig Von Drake (voiced by Corey Burton) – A scientist duck who occasionally appears as a scientific expert or creator of inventions that Bonkers uses in his cases.
Roderick Lizzard (voiced by Jeff Bennett) – A yellow iguana and a temperamental actor with the manners of a British aristocrat.
Tuttle Turtle (voiced by Maurice LaMarche) – A toon turtle who is the valet of Roderick Lizzard.
Bucky Buzzsaw (voiced by Pat Fraley) – A toon beaver who stars in his own show at Wackytoon Studios.
Slap, Sniffle and Flop – The toon mascots of the Weetie Crunchy cereal. Loosely based on Snap, Crackle and Pop, the mascots of Rice Krispies.
Donald Duck (voiced by Tony Anselmo) – A famous Disney duck who Bonkers saved from being robbed in "Going Bonkers".
Mickey Mouse (voiced by Wayne Allwine) – A famous Disney mouse, he appears in the episode "I Oughta Be in Toons" (but is almost never seen or mentioned on-screen) and makes a cameo in "Casabonkers".
Darkwing Duck (voiced by Jim Cummings) – He occasionally appears in the "Miranda" episodes.
Mrs. Francine Kanifky (voiced by Tress MacNeille) – The wife of Leonard Kanifky.
Wacky Weasel (voiced by Rip Taylor) - The cunningest toon villain that ever existed who had a fixation for eggs of any kind, which originally led to his capture. Upon breaking out of jail, he went on a rampage through the city, running rings round the entire police force, before finally being outsmarted by Bonkers.
The Rat (voiced by Brad Garrett) - A human who disguised himself as a toon rat in a bid to replace Mickey Mouse.
Mr. Malone (voiced by Alex Rocco) - A human.
The Ape (voiced by Chuck McCann) - Mr. Malone's toon pink gorilla accomplice.
Chick and Stu (voiced by Chick Vennera and Tino Insana)
Mammoth Mammoth (voiced by Stuart Pankin) - A toon mammoth whose role is a superhero and pretends to be a real one.
Toon Bomb (voiced by Jess Harnell) - A toon bomb who likes to make jokes and explodes when it gets nervous.
Hoagie, Knuckles, and Chumps (voiced by Rob Paulsen and Pat Fraley) - They are a trio of shady contractors who build shoddy houses and frame The Mean Old Wolf for the collapse of said houses.
Mr. Big (voiced by S. Scott Bullock) - A toon mouse who, despite his name, is very small. He is a friend to Tiny, who is a huge but polite hamster. He used a giant shadow to scare him.
The Weather Toons – Five toons, including Sunny (the sun), Cloudy (a rain cloud), Snowy (a drift of snow), Sparky (a lightning bolt), and Toony Tornado (a tornado).
Stretch and Squash (voiced by Jess Harnell and Corey Burton) - Two faded toon criminals who capture good cartoons to steal their colors.
The Mole (voiced by John Astin) - A toon mole who is the cause of Lucky's stress.
Louse A. Nominous (voiced by Brad Garrett) - An unreformable toon criminal who Bonkers and Lucky were forced to reform. He eats anything in his path (usually furniture).
Ma Parker (voiced by June Foray) - is a dog-faced toon tow truck who has tricked Lucky into thinking she’s really sweet, but is found out by Bonkers that she’s really a criminal who is stealing parts of their police car to build herself a suit of armor for a monster truck rally.
Wooly and Bully - Ma Parker's toon sidekicks.
Scatter Squirrel (voiced by Tino Insana) - A crazed thief with a fixation for nuts.
Toon Pencil (voiced by S. Scott Bullock) - A toon graffiti artist who spread toon graffiti all over Hollywood.
Zoom and Boom (voiced by Rob Paulsen and Pat Fraley) - A toon camera and a toon microphone who tried to destroy Piquel's reputation when he wanted to be the cop of the year.
Turbo, Banshee and Kapow - Three trolls who replaced Slap, Sniffle and Flop in their cereal commercial and tried to frame them for stealing prizes in the cereal boxes.
Two-Bits (voiced by Gilbert Gottfried) - An executive for Grandpa Arnie's Ant Show who uses a vacuum to steal the audience's change so that he can reunite with "Nicky", a nickel he had lost when his father put it in a parking meter. Two-Bits stops stealing change after Lucky gives him his last nickel, which turns out be Nicky.
Al Vermin (voiced by Robert Ridgely) - A toon cockroach who is Miranda and Bonkers' nemesis from the "Miranda Wright" era episodes.
Lilith DuPrave (voiced by Eileen Brennan) - A sleazy business woman and one of Bonkers and Miranda's nemesis who is the owner of a printing office. She is also responsible for smuggling weapons and kidnapping toons.
Mr. Blackenblue (voiced by Maurice LaMarche) - A heavily armed, powerfully-built man who is the bodyguard of Lilith DuPrave.
WildMan Wyatt (voiced by Pat Fraley) - Sergeant Grating's sworn enemy.
Flaps the Elephant (voiced by Joe Alaskey) - A massive toon elephant with small ears. He wishes he could fly like Dumbo.