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When the three children come of age, the Oracle explains the prophecy to them. Emboldened with this information, Sonic, Manic, and Sonia head off on a quest across Mobius in search of their mother. Dr. Robotnik has hired a pair of bounty hunters, Sleet and Dingo, who repeatedly try to catch the children and thus negate the prophecy.
Sonic, Manic, and Sonia each possess a magical medallion that can become a musical instrument, as well as weapons when the three are together in harmony. Sonic can access an electric guitar, Sonia can utilize a keyboard which also works as a smoke machine, and Manic medallion can transform into an "earth controlling" drum set with cymbals shown to deflect laser blasts. Each of the medallions can also be used to fire as if it were a laser gun. As the amulets can also metamorphose into musical instruments, the triplets use them to perform musical concerts, usually at least once per episode, as "Sonic Underground," an underground and illegal rock group.
- UPN
- 1 Season, 102 Episodes
- August 30, 1999
- Animation & Cartoon
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/10 - Cast: Maurice LaMarche, Garry Chalk, Gail Webster, Peter Wilds
Watch Full Episodes of Sonic Underground
Sonic Underground Full Episode Guide
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Sonic and Manic play a game of virtual reality to enhance their pilot skills. When the two brothers decide to put their practice to use, they fly in a successful mission that intercepts a supply ship from Robotnik. To put the Hedgehogs game to an end, Robotnik decides to invade the simulated world a
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The newly discovered Emerald Peninsula is a perfect place for Robotnik to add slaves to his empire. Sonic, Sonia and Manic are alerted to Robotnik's plan to transplant the peninsulas inhabitants and turn to a fortune teller for help. The mystic advises Sonia of a pendant that could reveal the answer
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Sonic and Manic play a game of virtual reality to enhance their pilot skills. When the two brothers decide to put their practice to use, they fly in a successful mission that intercepts a supply ship from Robotnik. To put the Hedgehogs game to an end, Robotnik decides to invade the simulated world and provoke a less successful outcome for Sonic and Manic. Once the virtual danger of the game becomes a reality, it is up to Sonia to play the game to save her brothers.
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The newly discovered Emerald Peninsula is a perfect place for Robotnik to add slaves to his empire. Sonic, Sonia and Manic are alerted of Robotnik's plan to transplant the peninsula's inhabitants and turn to a fortune teller for help. The mystic advises Sonia of a pendant that could reveal the answer to stopping Robotnik. One half of the pendent is discovered, but Sonia suddenly has a reaction from the pendant's side effects. Sonic and Manic must quickly find the other half to save their sister before she disappears.
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Robotnik's new weapon, Art, is the enforcer of Robotropolis new eradication policy. Art's objective is to destroy everything in sight, including Sonic, Manic and Sonia. The giant mechanical beast is seemingly unstoppable until he overhears the musical melodies of the Underground band. The music tames the savage beast and the Hedgehogs take advantage of this sudden change in the robots mood and turns Robotnik's weapon against him.
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Robotnik captures Bartleby and uses him as bait to capture Sonia. While the Hedgehogs are busy sealing Robotnik's mining operation, Sonia slips away to aid her friend in need. Once Sonic and Manic seal off the mines, they become aware that their sister is missing and race to save Bartleby and Sonia.
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On a mission in a distant sector of Robotropolis, the Hedgehogs are informed that freedom fighters have disappeared and are going to be robotisized. Sonic races to save his friends, but he is too late. The group of freedom fighters have been robotisized, including Cyrus' father. Cyrus and the Hedgehogs, now motivated by the injustice of what has happened, attempt to end the construction of the potent sleeper bombs that enabled Robotnik to capture a vital portion of the resistance.
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The Hedgehogs vacation is interrupted by the news of Robotnik's latest weapon. Sonic, Manic and Sonia must travel to the arctic where the weapon is located. They are shocked as the submarine melts the icy landscape from under their feet. The Hedgehogs then scurry to locate the lethal submarine before the entire planet is completely submerged underwater.
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Robotnik has arranged a museum exhibit of the Royal family goblets. Knowing that Sonic, Sonia and Manic will want to reclaim their family's treasures, Robotnik expects the heirlooms will serve as perfect bait to finally capture the Hedgehogs. Sonic and his siblings are aware that this is most likely a trap and devise a counter plan of their own to avoid getting caught. The Hedgehog's mission falls apart and when Sonic and Manic are taken prisoner, Sonia must choose between which brother she should risk rescuing from the robotization chamber first, Manic or Sonic.
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A self proclaimed scientist has come to Robotropolis with a device that will reverse the effects of Robotnik's robotisizer. Sonia, Manic and Sonia attend a demonstration of this new technology where Sonia decides she can use it to help her rescue a friend. Sonic, on the other hand, is skeptical that this machine is the real thing and decides to investigate. Robotnik kidnaps the inventor, and forces him to confess that he is a hoax. Robotnik will spare his life only if he agrees to use his machine as a robotisizer. Sonic learns of this deal and quickly rescues Sonia before she becomes Robotnik's next victim.
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Robotnik is using the local hairdresser, Doo-bot, to get information on the citizens that are against him. Sonia becomes a victim of the Doo-bots trance during a shampoo and while under the spell, divulges important information that could lead Robotnik to a secret base. The Hedgehogs learn that the Doo-bot is equipped with a recording device and dash to retrieve the tape from the Doo-bot before the secret location is disclosed.
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Queen Aleena advises the Hedgehogs to travel to a valley of Mobius so that they can bring about peace between two contingents of the resistance that have split. In the meantime, Robotnik is able to build a dam that is dangerous to the peoples land because of the lack of a cohesive effort to end the construction. Sonic, Manic and Sonia use the power of their music to settle the feud.
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Manic, Sonic and Sonia must end their training early when Robotnik threatens the Oracle and takes a member of the resistance hostage. During the rescue mission, the Hedgehogs fall into trouble and begin to place blame upon each other for everything that has gone awry. Queen Aleena then intervenes with an important message for her children that they must learn to work together and derive strength from their willingness to help others.
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Knuckles reluctantly makes a deal with Robotnik to turn over Sonic and his family in exchange for finding the Chaos Emerald that will save Mobius. Knuckles soon regrets that he ever trusted the evil dictator after Robotnik begins to follow through on his plans to robotisize the Hedgehogs. Once Knuckles saves his friends from doom, a larger challenge is waiting for them. Dingo has swallowed an emerald and is now a giant monster creating havoc all over the planet. The Hedgehogs and Robotnik have to stop the mutant creature before Mobius falls into certain oblivion.
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The Hedgehogs begin to learn the important lessons of what it takes to be a freedom fighter. The Oracle provides teachers to guide Sonic, Manic and Sonia to develop the necessary skills to recognize the power that comes from within. The Hedgehogs also discover the hidden magical force of the power medallions as they grow to understand that teamwork will serve them best in averting the dangers that await them.
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Sleet and Dingo escape the Flying Fortress with the Chaos Emerald. In a fight over who will control the Emerald's power, Sleet and Dingo drop and break the Emerald in two. Instantly, a rash of earthquakes and other natural disasters are sparked by the emerald's energy. Knuckles and the Hedgehogs turn to a relative of Knuckles for answers of how to stop Mobius from being slowly devoured by the emerald's force and find that the only solution to end the obliteration of Mobius is to make a deal with their arch rival Robotnik.
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What is supposed to be a vacation for Sonic, Manic and Sonia turns into a battle to save Mobius when Robotnik attacks with his newest weapon - the Flying Fortress. Sonic investigates the ship thinking the weapon can be destroyed by removing its reactor, however his efforts fail and he goes to Knuckles for help, because he believes the weapon is powered by the Chaos Emerald. Knuckles agrees to aid him suppressing the fear that the Floating Island will be left unprotected. Knuckles and Sonic locate power source only to have it taken by Sleet and Dingo before the Hedgehogs can reach it.
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Sonic, Manic and Sonia invade Robotnik's lair to retrieve the Hedgehog crest. After the book is reclaimed, they discover that this book contains directions to a scroll that could be an important tool to overthrow Robotnik. The scroll is heavily protected, but Sonic leads the group in the right direction where they eventually encounter the royal Aman-Rapi, who once awakened, demands the price of a song in exchange for the scroll.
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Sonic and his siblings travel to the outskirts of Mobius to recruit a tribe of nomads for the Resistance. The Hedgehogs van breaks down and they are saved by the tribesman. Once they return to the camp, Manic discovers that the chief has been robotisized, which is a secret that could have the chief banished from the tribe. Manic is then captured and taken from the camp, unbeknownst to Sonic, Sonia and the chief. Sonia and Sonic get to the bottom of why their brother is missing and rush to find him before it is too late.
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Sonic and Manic play a game of virtual reality to enhance their pilot skills.
-
The newly discovered Emerald Peninsula is a perfect place for Robotnik to add slaves to his empire.
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Robotnik's new weapon, Art, is the enforcer of Robotropolis new eradication policy.
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Robotnik captures Bartleby and uses him as bait to capture Sonia.
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On a mission in a distant sector of Robotropolis, the Hedgehogs are informed that freedom fighters have disappeared and are going to be robotisized.
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The Hedgehogs vacation is interrupted by the news of Robotnik's latest weapon.
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Robotnik has arranged a museum exhibit of the Royal family goblets.
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A self proclaimed scientist has come to Robotropolis with a device that will reverse the effects of Robotnik's robotisizer.
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Robotnik is using the local hairdresser, Doo-bot, to get information on the citizens that are against him.
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Queen Aleena advises the Hedgehogs to travel to a valley of Mobius so that they can bring about peace between two contingents of the resistance that have split.
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Manic, Sonic and Sonia must end their training early when Robotnik threatens the Oracle and takes a member of the resistance hostage.
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Knuckles reluctantly makes a deal with Robotnik to turn over Sonic and his family in exchange for finding the Chaos Emerald that will save Mobius.
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The Hedgehogs begin to learn the important lessons of what it takes to be a freedom fighter.
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Sleet and Dingo escape the Flying Fortress with the Chaos Emerald.
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The history of the Underground is told in detail, from the fall of Mobotropolis to the rise of Robotnik.
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What is supposed to be a vacation for Sonic, Manic and Sonia turns into a battle to save Mobius when Robotnik attacks with his newest weapon - the Flying Fortress.
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The Oracle advises the Hedgehogs to undertake a mission which could reveal answers about their future.
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The Hedgehogs latest quest to find their mother takes them to the prison tower where they encounter a masked stranger who insists he is family.
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Sonic, Manic and Sonia invade Robotnik's lair to retrieve the Hedgehog crest.
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Sonic and his siblings travel to the outskirts of Mobius to recruit a tribe of nomads for the Resistance.
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Sonic, Manic and Sonia find an abandoned baby in an alley and begin a search for the baby's parents.
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Robotnik has his sights set upon Queen Aleena's crown jewel, which glows as it is moved closer her.
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Sonic becomes frustrated that maybe all of their efforts of fighting for freedom seem futile.
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As Sonic begins to chow chili dogs for a snack, he finds a message in the sack from his mother urging him to head to Speedster Island.
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The Hedgehogs converge on the Floating Island, in their latest attempt to find their Mother.
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A speed enhancing fluid deemed Sonic Tonic is created by Robotnik to make him as fast as Sonic so that he may finally catch him.
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A faction of the Freedom Fighters is wiped out by a swarm of metallic fly-bots.
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The Hedgehogs steal historical artifacts of Mobuis from Robotnik before he can pawn them off at an auction.
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The Hedgehogs receive a message they believe is from their cousin.
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Robotnik organizes a track meet to lure Sonic into a trap.
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Sonia is invited to a debutante ball, but before she can be officially announced to society, she and her brothers, Manic and Sonic have an important mission.
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While lost in the wastelands of Mobius, Sonic, Manic and Sonia stumble upon an oasis called Lake Valley Resort.
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Queen Aleena's royal journals are rumored to be buried under a palace in the city of Tashistan.
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On a trip to Port Mobius, Sonic, Manic and Sonia are told that ships are sinking due to the Mobian sea-beast.
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The sinister Robotnik blackmails Cyrus, an old friend of Sonic's, by holding his father hostage.
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Sleet and Dingo plan to collect the taxes owed to Robotnik from the Duke of Velcronia but keep it for themselves.
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Sonia travels to east Mobius to visit her friend Mindy at the LaTour estate.
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Sonic, Sonia and Manic return to their birthplace, Mobodoon, a beautiful, festive town.
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Argus, a captain of the Queen's guard, is captured by Sleet and Dingo before he can reach the secret rendezvous where he was to meet Queen Aleena.
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Robotnik announces that he will marry Queen Aleena in a plot to become the king of Mobius.
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Sonia finds a magic pendant that threatens to turn her invisible.
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The Sonic Underground come across ART, Robotnik's most powerful robot ever, that can think and learn for itself. But ART soon learns the power of friendship...
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Bartleby is placed under arrest for helping out the resistance. As you might expect, it's the Sonic Underground to the rescue!
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Robotnik invents a new dart that induces sleep and sends them after the resistance. It's up to Sonic and sibs to stop them from the source.
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Robotnik comes up with his most original plan yet: melt the polar ice caps. Things will be hard for the Sonic Underground when Sonia gets split up from the group and mistaken for Queen Sauna.
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Sonic and Manic have been captured and are about to be robotisized! It's up to Sonia to save her brothers. But the thing is, they're in seperate robotisizers at opposite ends of the city!
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A Mobian named Titus creates a machine that can de-robotisize robots, called, appropriately enough, the De-Robotisizer. But when Robotnik and his crew go after it, it may do more harm than good.
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The Sonic Underground are on a mission to stop a group of hillbillies from feuding so they can stop Robotnik's dam-building project from flooding the countryside.
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Knuckles bargains with Robotnik in order to recover and repair the Chaos Emerald before Mobius is destroyed, but to acquire the villain's help, the echidna must betray the Hedgehogs..
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After taking off with the Chaos Emerald, Sleet and Dingo have a quibble over it, ending with Dingo accidentally breaking it and unleashing all the chaos energy. The Sonic Underground and Knuckles are off to talk to Knuckles' grandfather Athair for advice on handling the situation. But with all the chaos energy tearing apart the planet, can they survive long enough to make it? And even if they do, will they listen to the wise echidna's words?
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Robotnik creates a new flying fortress to lay waste to the planet. When the Sonic Underground suspects that the Chaos Emerald is keeping the fortress aloft, they head to the Floating Island to enlist the help of Knuckles. But we all know how hard-headed Knuckles is...
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In this episode, the Sonic Underground go and see the Oracle (again), who sends them to an alternate dimension, where they are the bad guys, and Robotnik is the good guy! But once Robotnik is on their side, they may be able to overthrow the bad hedgehogs and restore Mobotropolis to its former glory!
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In this episode the Sonic Underground rescue a prisoner from one of Robotnik's old prisoners - a hedgehog wearing a mask (so you can't see his face properly). The prisoner claims he is the hedgehogs uncle, the twin brother of Queen Aleena! But it is all just a sinister plan by Robotnik to split the Sonic Underground up.
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After stealing back a book engraved with the royal seal from Robotnik, the sonic trio discover that a prophet had foreseen Robotnik's takeover of Mobius, and has also foreseen his defeat!To even more surprise, it is revealed that the prophet also wrote down what he had foreseen on a scroll, which sonic and his sibling's quest for.The journey takes them through the treacherous Mobius desert [sandopolis or whatever you want to call it] and many perils and traps.But the underground prevail and locate the temple where the scroll was long hidden. In the meantime, sleet and Dingo, also find the temple, and pretty soon, the stage is set for a battle to decide the future of mobius..
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While in Robotropolis, Sonic & co. find an abandoned baby hedgehog. While Sonic and Sonia search for its parents, Manic is left to mind it, and get in touch with his mothering instincts....or maybe just take it flying with him :) But the baby isn't as innocent as it looks...and Robotnik comes within an inch of uncovering Sanctuary.
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Aleena's Royal Jewel can trace the Queen like a homing device.... now, I wonder who might be interested in that? As the siblings follow Mother and Robonik follows them, the elusive Queen seems almost within reach at last. Unless, of course, it's all an elaborate bluff.
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The oracle, wishing to test the Hedgehog's practical capabilities, strips them of their powers and sends them into an alternate, roman-themed reality where a Sleet-look-alike presides as King.The former fast and furious hedgehogs must use their usual blend of cunning and strategy to save this reality, but without their super-speed, will they be stopped dead in their tracks?
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Queen Aleena sends her children over to Speedster Island, a place Bartleby is trying to turn into a holiday resort. Sleet and Dingo are pretending to help, but they just want to robotocise the islanders, who worship three stone heads that resemble Sonic, Sonia and Manic.
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The band visit the Floating Island in search of their mother. There they meet Knuckles the Echidna, the island's guardian, who has been told by Sleet and Dingo that the Sonic Underground is after the Chaos Emerald.
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Using the essence of a rare plant, Robotnik manages to make Sleet and Dingo fast-- maybe even faster than Sonic. The Sonic Underground manage to get hold of it, but can Sonia and Manic resist the temptation of taking the drug themselves and being as fast as Sonic?
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The band finds a village that has been destroyed by its Freedom Fighter occupants. Why has this happened? It seems to be something to do with the Flybots all over the desert, as Manic finds out when he's injected with a mind-control toxin.
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In order to make a lot of money, Robotnik sells artifacts to the nobility of Mobius. But these artifacts are actually from more recent history; they are bombs, and they're about to go off.
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Robotnik has created a super-fast robot, and he's organised a race for the top athletes of Mobius and the robot. But it's all a trap to drive Sonic out into the open... can he resist the competition?
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Sonia has been invited to a debutante ball, arranged by none other than Robitnik's right hand man Bartleby!Sonic helps her in getting there without being caught, but even more problems arise when Cyrus chooses her to fly the captives of the ""Predator"" to safety...
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The hedgehogs come across Lake Valley, a beautiful resort. But how can it be beautiful when Robotnik's controlling the rest of Mobius? The band's about to find out...
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The Sonic Underground arrive in Mobia in search of the Queen's Journal. In the city Sonia loses her memory and meets Raphi, one of the town's resistance...
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Manic begins to backslide to his old ways when the SoUnd encounter, a group of teenage pickpockets, led by Max. Meanwhile, Sleet and Dingo are plotting to avoid giving the taxes they are collecting to Robotnik. They only need someone to frame for a theft, and Manic is the perfect victim.
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Sonia gets down 'n' dirty with Sleet and Dingo (literally), and to freshen up, she and her brothers journey to East Mobius. There, Sonia is reunited with some old friends, Mindy Latour and her father. Mindy gives Sonia a locket, but unbeknownst to Sonic's sister or Mindy, the locket is a tracking device designed by Robotnik. Sonia finds out too late, and soon Mindy's kingdom is swarming with similar wristwatch-style robots, all programmed to capture the hedgehogs! Can the siblings stomp out this bug problem?
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Evading sleet and dingo, the hedgehogs fins themselves in a town completely untainted by robotnik's hand. Where the people are kind-hearted, and the food is free!Sounds like an ideal place, but there is more to Mobodon than meets the eye, after using the power stone, the siblings discover that this is where they were born!Before further questions can be answered,Sleet and dingo attack with an army of SWATBOTS, to preserve their past, the hedgehogs fight for Mobodon's future..
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Argus, the former captain of the Queen's guard, arranges a secret meeting with her.But he is soon intercepted by Robotnik's bounty hunters, Sleet and Dingo, who have every intention of feeding the soldier to the roboticizer, the Sonic trio race to the rescue..
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When Robotnik announces he plans to marry Queen Aleena, the shocked sonic siblings race to the rescue, unaware it's a trap..
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Sonic, Sonia and Manic put their training to the test as they embark on a mission to rescue the Oracle from Robotnik! Can they work together in harmony, or will their lacking seal their own doom?
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The newly reunited Sonic Siblings must learn to work as a team if they are to do battle with Robotnik.But do they really know each other well enough?
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Queen Aleena tells the story of how Dr. Robotnik took over, Mobius, and how she had to give up her children [Manix, Sonia, and Sonic] to help fulfil a prophecy exclaiming that one day, the siblings will be able to rise against Robotnik's rule and restore peace to the planet..
