Simon Bar Sinister Appearances: Simon Says, Go Snow, Zot, The Big Shrink, Weathering The Storm, The Phoney Booths, The Forget-Me-Net, Simon Says "No Thanksgiving", The Tickle Feather Machine, The Big Dipper, Simon Says "Be My Valentine", The Vacuum Gun,
movie Simon Bar Sinister is a
mad scientist. (A
bend sinister—sometimes, inaccurately, called a
bar sinister—is a diagonal line in
heraldry that can indicate that the bearer is a bastard by birth.) He is the wickedest man in the world, precedes all his commands with “
Simon Says,” and has an assistant named Cad Lackey. It is Simon Bar Sinister's ambition to rule the world, but, each time, Underdog defeats him. Simon is short, with very sparse hair except for a pair of thick black eyebrows. His skin is a sickly green with dark circles around his eyes, and his front teeth stick out of his mouth. He wears a white
lab coat over a black suit with a black bow tie and a pair of purple gloves. For the TV series, Simon Bar Sinister was voiced by
Allen Swift, impersonating
Lionel Barrymore. For the movie, he is portrayed by
Peter Dinklage.
Cad Lackey Appearances: Go Snow, The Big Shrink, Weathering The Storm, The Phoney Booths, The Forget-Me-Net, Simon Says "No Thanksgiving", The Tickle Feather Machine, The Big Dipper, Simon Says "Be My Valentine", The Vacuum Gun,
movie Cad Lackey was Simon's henchman, who, though generally dull-witted, was occasionally capable of pointing out flaws in his boss's plans. Contrary to the mad scientist stereotype, Simon actually paid good attention to Cad's suggestions in these episodes. Cad is tall, with slicked-back blond hair, and originally had a pallid complexion in "Go Snow", "The Big Shrink", and "Weathering the Storm", but has a healthier complexion from "The Phoney Booths" onward. He wears a red smock and black trousers and shoes. In the live-action film, he was portrayed as more intelligent and level-headed. He was Simon's partner and the
security guard of a building where Simon hid out after hours. He is voiced by Ben Stone impersonating
Humphrey Bogart in the cartoon. In the movie, he is portrayed by
Patrick Warburton.
Riff Raff Appearances: The Great Gold Robbery, Fearo, From Hopeless to Helpless, The Gold Bricks, Pain Strikes Underdog, Whistler's Father, RiffRaffville, Just In Case, The Vacuum Gun,
movie Riff Raff is an
anthropomorphic wolf gangster. He leads an unnamed gang that often carry out various crime waves until they are stopped by Underdog. In "The Vacuum Gun," Riff Raff and his gang were among the criminals that were recruited by Simon Bar Sinister. In keeping with the classic gangster image he likes to cultivate, Riff wears a greyish purple pinstripe suit with a white flower in the left lapel, a black shirt, a yellow tie, and black shoes. In the film, Riff Raff is portrayed as a
Rottweiler. When he meets Shoeshine, he and his dog henchmen chase him around an alley in an attempt to eat him until he is found by Dan Unger, when they run away. They meet again with Polly (whom Riff Raff tries to flirt with) on the sidewalk. Around the end of the film, Shoeshine barks at Riff Raff enough to remove some of his fur and he and his henchmen run away again for the last time. In contrast to his role as a major villain on the series, Riff Raff is portrayed as more of a comic relief minor villain. Riff Raff is voiced by Allen Swift impersonating
George Raft in the cartoon. In the film, Riff Raff was voiced by
Brad Garrett.
Riff Raff's gang In addition to some unnamed members, the following are members of Riff Raff's gang:
Dinah Mite Appearances: Whistler's Father Dinah Mite is one of the criminals Riff Raff summoned in the episode "Whistler's Father". She is the best bomb-tosser in the crime business.
Mooch Appearances: The Great Gold Robbery, Fearo, From Hopeless to Helpless, Pain Strikes Underdog, Whistler's Father, RiffRaffville, The Vacuum Gun Mooch is the top gunman in Riff Raff's gang and is Riff Raff's right-hand man. He is modeled after
Walter Matthau and voiced by
George S. Irving.
Nails the Carpenter Appearances: Just in Case Nails the
Carpenter is one of the new members of Riff Raff's gang. He rebuilt the sunken ship of
Captain Kidd as part of Riff Raff's
ghost ship plot.
Needles the Tailor Appearances: Just In Case Needles the
Tailor is one of the new members of Riff Raff's gang. He sewed a sail as part of Riff Raff's ghost ship plot.
Sandy the Safecracker Appearances: Whistler's Father, Riffraffville, The Vacuum Gun Sandy the
Safecracker is the best at breaking banks. He just opens safes with his fingers.
Smitty the Blacksmith Appearances: Just In Case Smitty the
Blacksmith is one of the new members of Riff Raff's gang. He hammered out an anchor as part of Riff Raff's ghost ship plot. Voiced by
George S. Irving.
Spinny Wheels Appearances: Whistler's Father, Riffraffville, The Vacuum Gun Spinny Wheels is the best
getaway car driver in the crime business.
Witch Doctor Appearances: Just In Case The
Witch Doctor is one of the new members of Riff Raff's gang. He was the disguised prisoner who went with Riff Raff during the prison break. When asked by Nails, Needles, and Smitty why they should bring him along during the prison break and give him a share of the loot, Riff Raff kept telling them "Just In Case". When Sweet Polly Purebred ends up captured during her infiltration, Riff Raff reveals the disguised prisoner to be a Witch Doctor. When Underdog arrives, the Witch Doctor puts Underdog under a voodoo spell which was instantly broken by Underdog taking his Super Energy Pill. Voiced by
George S. Irving.
Other villains Batty-Man Appearances: Batty-Man, The Vacuum Gun Batty-Man (voiced by
Allen Swift) is a
vampire villain who commands a massive army of giant
bats and lives in Belfrey Castle. In "Batty-Man", he and his batty army caused a crime wave nationwide, baffling everyone in the country. The crime wave was arranged to make Underdog powerless enough so Batty-Man could not be stopped from pulling the crime of the century. Soon, Underdog found out Batty-Man was the crook behind the crime wave after Sweet Polly was taken captive. Underdog had to rescue her and defeat Batty-Man, but he failed and was captured. Batty-Man later planned to steal all the gold in
Fort Knox and use it to go to
Europe by turning the gold into bowling balls. Underdog and Polly escaped before they could get turned into bowling balls and defeated Batty-Man. Everything was then returned to its rightful owners. Batty-Man was later freed from prison by Simon Bar Sinister. He, along with Riff Raff and the Electric Eel, was enlisted to help Simon with his Vacuum Gun plan, which Underdog later stopped. In the 1987
Spotlight Comics Underdog #2, Batty-Man was at home watching the news when he noticed Sweet Polly. He instantly fell in love with Sweet Polly and ordered his right-hand man, Georgie, and his bat minions to kidnap Sweet Polly and bring her over to his castle in order to woo her. But Sweet Polly did not return his feelings and Batty-Man ordered Georgie to take her down to the
catacombs. Shoeshine heard Polly's cries for help and changed into Underdog to rescue her. After Polly was rescued, Batty-Man said to her that "their love was never meant to be."
Georgie Appearances: Batty-Man, The Vacuum Gun Georgie (voiced by
George S. Irving) is Batty-Man's assistant.
The Bubblehead Empire Appearances: The Bubbleheads The Bubblehead Empire is a society of people who all wear air helmets and live under the sea, in the city of Maldemare (the name being a take-off on the French phrase mal de mer, meaning “seasickness”). They command sea creatures to do their bidding and deal with their prisoners by feeding them to a giant clam. The city is ruled by the
Bubblehead Emperor, who in turn was ruled by the
Bubblehead Empress. The Bubblehead Empress was tired of living under the sea, so she wanted to take over the dry land. The Bubblehead scientists worked to destroy the land, using earthquakes and volcanoes, but those two evil plans were foiled by Underdog. As a result, the two scientists were fed to the Giant Clam. The third evil plot was to use a machine creating a tidal wave powerful enough to destroy the Earth. Soon, everybody around the world was aware that something peculiar was happening to the ocean. Sweet Polly Purebred, with the aid from one of the world's leading scientists
Professor Moby Von Ahab (the name being a take-off on both Captain Ahab and Moby Dick), investigated what was happening under the sea, but were eventually captured and tossed into the giant clam. Underdog got word that his friends were held captive, rescued Sweet Polly and the Professor and destroyed the tidal wave machine.
Irving and Ralph Appearances: Zot Irving and Ralph are a two-headed
dragon that are known as the legendary enemies of the planet Zot. For every task they do, they do it with teamwork as noted by the quote "Teamwork! Teamwork! That's what counts!". When they attacked while Underdog was to forcibly wed Glissando, Princess of Zot, Underdog easily defeated them and they promised never to bother Zot's inhabitants again. Upon their defeat, Underdog was allowed to return home to Earth, knowing that he had helped Glissando find her future husband: Zot's Prime Minister.
The Magnet Men Appearances: The Magnet Men, The Flying Sorcerers The Magnet Men are evil robots from another planet. The Magnet Men feed on metal. They demanded that the Earth give them all of its metal. When the Earth refuses, the Magnet Men use their Great Gravity Gun to pull the Earth towards them. As the Earth moves away from the Sun, the planet plunges into a deep freeze. Underdog defeats the Magnet Men, destroys the Great Gravity Gun, and puts the Earth back in its correct position in space. In "The Flying Sorcerers," one Magnet Man was abducted by Prince Bric and Prince Brac to make a cake for their father, King Cup. Unfortunately, all cakes the Magnet Men make are made of metal.
The Marbleheads Appearances: The Marbleheads The Marbleheads are people made of marble.
Captain Marblehead (voiced by
Allen Swift) is the dictator of their planet. Captain Marblehead holds their most powerful weapon, the Granite Gun, that could turn anyone into solid stone and used it on Underdog, but to Marblehead's shock he breaks free. Underdog defeats the Marbleheads and the Granite Gun and frees all the slaves.
The Molemen Appearances: The Molemen The
Molemen are an evil society of giant
moles who live underground, led by the evil
King Mange (voiced by
Allen Swift). They planned to conquer the world by stealing all the food in the world, thus making everyone weak, sluggish and without energy. With this advantage, the Molemen and their giant ants would have no problem conquering the world. Other giant bugs under the Molemens' ownership include a giant caterpillar who encased Underdog and Polly in a cocoon, and a giant spider who attempted to trap them in a web. As Sweet Polly was investigating the thefts, she was captured by King Mange and Underdog was called to rescue her, but he succumbed to the Mole-Hole Gun, the Molemen's secret weapon. Afterwards, he was captured. King Mange threatened to destroy Sweet Polly if Underdog did not do what Mange said. Underdog got Sweet Polly free and soon had the answer to everyone's energy problems. He filled every water reservoir in the world with his Super Energy Pills, investing the water with tremendous energy. Soon afterward, the citizens had enough energy to escape the Molemen's attack and the Army had the strength to fight. King Mange was eventually defeated and arrested.
Overcat Appearances: Underdog vs. Overcat Overcat (voiced by
Allen Swift) is a giant anthropomorphic
cat who was once the infamous ruler of the planet Felina. He is an arrogant bully and also has all of Underdog's powers. One day on Felina, the milk wells ran dry, so Overcat stole the cows from the Earth, kidnapped Sweet Polly Purebred and forced her to milk the cows so the giant cats of Felina can have a lifetime supply of milk. After Underdog rescued Polly and the cows, Overcat challenged Underdog to a winner-take-all fight. Unless Underdog fought Overcat, the giant cats of Felina would destroy the Earth. As Underdog fought Overcat, it appeared Overcat had the upper-hand, but Overcat's size and lack of speed allowed Underdog to come out the victor. Underdog promised milk growing from coconut trees to the giant cats of Felina if the giant cats banished Overcat from Felina and let the other worlds live as they pleased. Underdog carried out the promise and all the cats were happy, because with the coconut trees, the cats would not run out of milk. After being banished from Felina, Overcat swore he would find another planet to conquer, train harder to become stronger and one day return to Earth to wipe out Underdog. Despite this, Overcat was never seen in the series again afterwards.
Slippery Eel (a.k.a. The Electric Eel) Appearances: A New Villain, The Vacuum Gun Slippery Eel is one of the world's most dangerous criminals. He got the name
The Electric Eel after he was electrified by the gates of the prison's electric fence while he was trying to escape. After being electrified, he gained the power to control electricity. Electric Eel was the only villain who ever actually defeated Underdog, using his electrical powers and apparently killing Underdog. However, before he "died", Underdog requested that he not be thrown into the lake. Eel, being the villain that he was, naturally decided to throw Underdog into the lake, which drained the electricity from Underdog's body and restored him to "life", whereupon he polished off Eel and his gang. Eel was then confined in a glass prison cell. In "The Vacuum Gun," Electric Eel and his gang were recruited by Simon Bar Sinister when he found Eel's sewer hideout.
Tap Tap the Chiseler Appearances: From Hopeless to Helpless, Tricky Trap by Tap Tap Tap Tap the Chiseler is a criminal that chisels jewelry, making them into smaller pieces of jewelry. He bears an uncanny amazing resemblance to Underdog, and Tap Tap can use this advantage to impersonate Underdog. However, unlike Underdog, he does not speak in rhyme. He also seems to be close friends with Riff Raff. He is voiced by
George S. Irving. In "From Hopeless to Helpless", after Riff Raff stole the Hopeless Diamond, Tap Tap was hired to help cut it into little pieces so that Riff Raff could sell it and impersonate Underdog in order to commit crimes all over town. Everyone, including Sweet Polly (this is the only episode in the series where even she begin to doubt about Underdog, due to her being fooled by Tap Tap and mistaking him for Underdog after he snatched her purse), thought Underdog had turned to crime and he was sent to jail, much to Underdog's shock. Tap Tap pulled off the crimes so excellently that even Underdog (thanks to Sweet Polly's biased lecturing) was convinced he was guilty, believing that he had sleepwalked when the crimes were committed. However, Riff Raff needed Underdog to break the Hopeless Diamond into a million pieces after Tap Tap had failed to cut it, so they broke Underdog out of jail and told Underdog that Tap Tap had imitated him and framed him for the crimes all over town. Now knowing that Tap Tap had been responsible for the crimes that were supposedly committed by him, Underdog pretended to really turn to crime in order to fool the gang. When he finally retrieved the Hopeless Diamond from Riff Raff, Mooch and Tap Tap, he apprehended them and explained to the townspeople, including Sweet Polly, how Tap Tap had imitated him and framed him for the crimes. The townspeople, including Sweet Polly apologized to Underdog for the misunderstanding and falsely accusing him. Prior to the episode "Tricky Trap by Tap Tap", Tap Tap was sent to prison. When that episode aired, Tap Tap once again disguised himself as Underdog again and broke out of jail on the same day Underdog was visiting the prison. Part of his revenge plan was to first purchase a bomb from a bomb factory and borrow a policeman's handcuffs. He used the handcuffs to cuff himself to Sweet Polly and threatened to use the bomb to blow himself and Sweet Polly to bits if Underdog did not do what he said. Underdog stopped him by melting the handcuffs with his cosmic vision, then tackling Tap Tap, accidentally detonating the bomb in the process. Underdog was, of course, unharmed, while Tap Tap was left singed and dazed before being taken back to prison.
Wicked Witch of Pickyoon Appearances: The Witch of Pickyoon The Wicked Witch of Pickyoon is an evil
witch who rules over the strange land of the Pickyoons and has enslaved all who inhabit the land. She lives in a castle in the mountains of Pickyoon. She wished to be the most powerful being in all of Pickyoon and she was, until Underdog came along. She planned to capture Sweet Polly and put Underdog in her power. She put a spell on Sweet Polly, causing her to fall asleep for 1,000 years. The Witch was the only one who knew how to break the spell (although, everybody knows the only way to break a spell is as if the hero kisses someone under the spell). If she was going to tell Underdog how to undo the spell, he had to perform three tasks: steal water, steal diamonds and help her assemble an army to conquer the world. Unless Underdog helped the Witch with those tasks, she would not break the spell that had been cast on Sweet Polly. Underdog refused to accomplish the tasks, for it would make him as wicked as the Witch. But every time Underdog refused to do the tasks, the Witch reminded him that Polly would sleep for 1,000 years unless he did what she said. Underdog struck water by burrowing through the underground depths of Pickyoon and made diamonds out of coal. Soon, all that was left was to help the Witch conquer the world. When Underdog refused to perform the final task, he eventually got into a fight with the Witch, causing her to vanish forever by destroying her broom. Afterwards, Underdog awakened Polly with a kiss and the people of Pickyoon were freed from the Witch's power.
Zorm Appearances: Round and Round Zorm is the ruler of a strange planet. He planned to take over the world, but in order to do that, he must keep Underdog from interfering. He sent Cron to Earth. Cron put a charm around Underdog's neck that caused him to fall under his dizzy spell when standing up. But when Underdog sat down, he felt perfectly fine. Underdog eventually got the charm off and foiled Zorm's plan.
Cron Appearances: Round and Round Cron is Zorm's henchman.
Reformed villains The following villains gave up their evil plans after being thwarted by Underdog:
The Cloud Men Appearances: The Silver Thieves The Cloud Men are a race of
ghost-like creatures. They live on the Planet Cumulus and are led by
King Cumulus Regulus (voiced by
Allen Swift). When humans "interfere with them," the Cloud Men lightning jolt them by shooting out electric bolts from their fingers that turn them into living statues. They stole all the silver on Earth, including Underdog's ring, because everything they had was made of gold and "every Cloud Man must have a silver lining". When Underdog and Sweet Polly headed for a conveyor belt, Underdog found his ring and took his Underdog Super Energy Pill, then defeated the Cloud Men. In the end, the Cloud Men traded gold for silver with the Earth.
The Flying Sorcerers Appearances: The Flying Sorcerers The Flying Sorcerers are a strange alien race led by
King Cup (voiced by
Allen Swift). King Cup sent his twin sons
Prince Bric and
Prince Brac to find someone who can bake a cake for his people after the old royal baker was fired for his cake not being good. The first two baking slaves they found upon King Cup firing a dart at three possible planets were a
Magnet Man and an inhabitant of Zot, but they could not bake a cake that tasted like cake (the Magnet Man's cake was made of metal and the Zot Man's cake's texture was gummy and sticky) and were imprisoned. Then they made Sweet Polly their new baking slave. Before Underdog could rescue her, Bric and Brac transformed him into a
bouncing ball. Sweet Polly was forced to bake 500 cakes for the Flying Sorcerers, but her weariness from baking the cakes made her fall into the giant mixing bowl she was using to make the cakes. Underdog freed himself from Bric and Brac's spell and defeated the Flying Sorcerers. At first, King Cup was upset that Underdog was taking his baking slave home, but after vowing he would not abuse others again, he received one of Sweet Polly's cake recipes so that he could make his own cakes for his people. It's implied that King Cup released and returned the Magnet and Zot Men to their respective home planets afterwards.
Fat Cat/Tony La Griffe Tiffy Raff/Bad Dog ==Other characters==