Watch Sonic Underground Online
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Virtual Danger
Full Episode
S 1 : Ep 40 - 1/30/04
Sonic and Manic get addicted to a new video game that it is hindering Cyrus' plan to infiltrate Eggman's base. But, when Sonic and Manic get sucked into the game, can they survive when they find out Robotnik is behind everything and ready to eliminate them?moreless -
The Pendant
Full Episode
S 1 : Ep 39 - 10/21/99
Sonia finds a magic pendant that threatens to turn her invisible. Sonic and Manic are in a race against time to find the cure to this seemingly irreversible spell before Sonia disappears forever....moreless -
The Art of Destruction
Full Episode
S 1 : Ep 38 - 10/20/99
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... -
Bartleby the Prisoner
Full Episode
S 1 : Ep 37 - 10/19/99
Bartleby is placed under arrest for helping out the resistance. As you might expect, it's the Sonic Underground to the rescue! -
Sleepers
Full Episode
S 1 : Ep 36 - 10/18/99
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. But they run into a bit of trouble when Manic is hit by the sleeper darts, and the person creating the sleepers is none other than Cyrus' robotcized father!moreless -
The Big Melt
Full Episode
S 1 : Ep 35 - 1/23/04
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 by a group of penguins who are having troubles of their own.moreless -
Sonia's Choice
Full Episode
S 1 : Ep 34 - 10/14/99
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 separate robotisizers at opposite ends of the city! Sonia's loyalty is then challenged in the choice between her brothers.moreless -
Healer
Full Episode
S 1 : Ep 33 - 10/13/99
A Mobian named Titus creates a machine that can de-robotisize robots, called, appropriately enough, the De-Roboticizer. But when Robotnik and his crew go after it, it may do more harm than good. -
New Echinda in Town
Full Episode
S 1 : Ep 33 -
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. -
Haircraft in Space
Full Episode
S 1 : Ep 32 - 10/12/99
A salon robot is hypnotising people that go to her salon into revealing deep secrets. When Sonia goes, she spills information about the resistance! Can she and her brothers keep Robotnik from getting the information?moreless -
Country Crisis
Full Episode
S 1 : Ep 31 - 10/11/99
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. -
Haircraft in Flight
Full Episode
S 1 : Ep 30 -
Robotnik is using the local hairdresser, Doo-bot, to get information on the citizens who are against him. -
No Hedgehog Is an Island (Chaos Emerald Crisis, Part 2)
Full Episode
S 1 : Ep 29 - 10/5/99
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?moreless -
Six Is a Crowd
Full Episode
S 1 : Ep 27 - 9/30/99
In this episode, the Sonic Underground goes to 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!moreless -
The Hedgehog in the Iron Mask
Full Episode
S 1 : Ep 26 - 9/29/99
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.moreless -
Flying Fortress
Full Episode
S 1 : Ep 26 -
What is supposed to be a vacation for Sonic, Manic and Sonia turns into a battle to save Mobius when Robotnik attacks with his latest weapon. -
Mummy Dearest
Full Episode
S 1 : Ep 25 - 9/28/99
The Sonic Underground journey through the treacherous Mobius desert as they try to locate a hidden temple filled with prophecies of Robotnik's defeat. But, with Sleet and Dingo in hot pursuit, can the Sonic Underground find the scrolls before it's too late?moreless -
Dunesday
Full Episode
S 1 : Ep 24 - 9/27/99
The Sonic Underground come across and nomadic tribe whilst journeying through the desert. However, Manic doesn't seem to trust the tribe leader named, "Ifyoucan". When Manic gets abandoned in the desert and Sleet and Dingo on their way, can Sonia and Sonic save Manic and the tribe?moreless -
Three Hedgehogs and a Baby
Full Episode
S 1 : Ep 23 - 1/2/04
While in Robotropolis, Sonic, Sonia, and Manic 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. But the baby isn't as innocent as it looks...and Robotnik comes within an inch of uncovering the sanctuary.moreless -
The Jewel in the Crown
Full Episode
S 1 : Ep 22 - 9/23/99
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.moreless -
When in Rome
Full Episode
S 1 : Ep 21 - 9/22/99
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?moreless -
Head Games
Full Episode
S 1 : Ep 20 - 9/21/99
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.moreless -
Friend or Foe
Full Episode
S 1 : Ep 19 - 9/20/99
The band visit the Floating Island in search of their mother. There they meet Knuckles the Echidna, the island's guardian, who has been falsely told by Sleet and Dingo that the Sonic Underground is after the Chaos Emerald, and he jumps to conclusions!moreless -
Sonic Tonic
Full Episode
S 1 : Ep 18 - 12/26/03
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 potion themselves and being as fast as Sonic?moreless -
Bug!
Full Episode
S 1 : Ep 17 - 9/16/99
The Underground 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 making him a slave to Dr. Robotnik!moreless -
Artifact
Full Episode
S 1 : Ep 16 - 9/15/99
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.moreless -
A Hedgehog's Home Is Her Castle
Full Episode
S 1 : Ep 15 - 9/14/99
Sonia inherits a spooky and dilapidated castle, and she enjoys the idea of making it the Underground headquarters. But all is not as it seems when they stay there overnight. -
Winner Fakes All
Full Episode
S 1 : Ep 14 - 9/13/99
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?moreless -
Come Out Wherever You Are
Full Episode
S 1 : Ep 13 - 12/19/03
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...moreless - Load More
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