Sonic Underground

Sonic Underground

In this 3rd cartoon of Sonic the Hedgehog, Sonic and his two siblings, Manic and Sonia are the hit rock band, Sonic Undeground. But in reality they are the children of Queen Aleana, the queen of Mobius. Queen Aleana was abandoned from Mobius by Sonic's enemy, Dr. Robotnik who turned Mobius into a waste land. So now Sonic, Manic and Sonia must fight Dr. Robotnik and his two sidekicks, Sleet and Dingo and the SWAT Bots, with the aid of their metal medallions and bring peace to Mobius and find mother! Will the hedgehogs find their mother? Will they defeat Robotnik? The resistance begins on Sonic Undergroud! Written by Stuart Brewer

Seasons

01
HD Beginnings (Origins: Part 1)

Beginnings (Origins: Part 1)

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Beginnings (Origins: Part 1) - EPS 01

HD
IMDb: 6.2
0
22 min

The history of the Underground is told in detail, from the fall of Mobotropolis to the rise of Robotnik.

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HD Getting to Know You (Origins: Part 2)

Getting to Know You (Origins: Part 2)

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Getting to Know You (Origins: Part 2) - EPS 02

HD
IMDb: 5.9
0
22 min

The Hedgehogs begin to learn the important lessons of what it takes to be a freedom fighter.

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HD Harmony or Something (Origins: Part 3)

Harmony or Something (Origins: Part 3)

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Harmony or Something (Origins: Part 3) - EPS 03

HD
IMDb: 5.3
0
22 min

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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HD To Catch a Queen

To Catch a Queen

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To Catch a Queen - EPS 04

HD
IMDb: 6.1
0
22 min

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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HD Mobodoon

Mobodoon

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Mobodoon - EPS 05

HD
IMDb: 6.1
0
22 min

Sonic, Sonia and Manic return to their birthplace, Mobodoon, a beautiful, festive town.

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HD The Price of Freedom

The Price of Freedom

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The Price of Freedom - EPS 06

HD
IMDb: 5.6
0
22 min

Sonia travels to east Mobius to visit her friend Mindy at the LaTour estate.

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HD Underground Masquerade

Underground Masquerade

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Underground Masquerade - EPS 07

HD
IMDb: 5.0
0
22 min

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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HD Tangled Webs

Tangled Webs

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Tangled Webs - EPS 08

HD
IMDb: 6.1
0
22 min

The sinister Robotnik blackmails Cyrus, an old friend of Sonic's, by holding his father hostage.

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HD The Deepest Fear

The Deepest Fear

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The Deepest Fear - EPS 09

HD
IMDb: 5.9
0
22 min

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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HD Who Do You Think You Are?

Who Do You Think You Are?

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Who Do You Think You Are? - EPS 10

HD
IMDb: 5.2
0
21 min

Queen Aleena's royal journals are rumored to be buried under a palace in the city of Tashistan.

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HD The Last Resort

The Last Resort

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The Last Resort - EPS 11

HD
IMDb: 5.8
0
22 min

While lost in the wastelands of Mobius, Sonic, Manic and Sonia stumble upon an oasis called Lake Valley Resort.

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HD Come Out Wherever You Are

Come Out Wherever You Are

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Come Out Wherever You Are - EPS 12

HD
IMDb: 5.4
0
22 min

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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HD Winner Fakes All

Winner Fakes All

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Winner Fakes All - EPS 13

HD
IMDb: 5.1
0
22 min

Robotnik organizes a track meet to lure Sonic into a trap.

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HD A Hedgehog's Home is Her Castle

A Hedgehog's Home is Her Castle

EPS14

A Hedgehog's Home is Her Castle - EPS 14

HD
IMDb: 5.3
0
22 min

The Hedgehogs receive a message they believe is from their cousin.

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HD Artifact

Artifact

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Artifact - EPS 15

HD
IMDb: 5.3
0
22 min

The Hedgehogs steal historical artifacts of Mobuis from Robotnik before he can pawn them off at an auction.

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HD Bug!

Bug!

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Bug! - EPS 16

HD
IMDb: 6.1
0
22 min

A faction of the Freedom Fighters is wiped out by a swarm of metallic fly-bots.

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HD Sonic Tonic

Sonic Tonic

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Sonic Tonic - EPS 17

HD
IMDb: 4.9
0
22 min

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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HD Friend or Foe

Friend or Foe

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Friend or Foe - EPS 18

HD
IMDb: 5.6
0
22 min

The Hedgehogs converge on the Floating Island, in their latest attempt to find their Mother.

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HD Head Games

Head Games

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Head Games - EPS 19

HD
IMDb: 5.1
0
22 min

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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HD When in Rome

When in Rome

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When in Rome - EPS 20

HD
IMDb: 5.0
0
22 min

Sonic becomes frustrated that maybe all of their efforts of fighting for freedom seem futile.

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HD The Jewel in the Crown

The Jewel in the Crown

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The Jewel in the Crown - EPS 21

HD
IMDb: 5.0
0
21 min

Robotnik has his sights set upon Queen Aleena's crown jewel, which glows as it is moved closer her.

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HD Three Hedgehogs and a Baby

Three Hedgehogs and a Baby

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Three Hedgehogs and a Baby - EPS 22

HD
IMDb: 6.2
0
21 min

Sonic, Manic and Sonia find an abandoned baby in an alley and begin a search for the baby's parents. Manic grows particularly fond of the child and decides that instead of taking the baby to a shelter as Sonic and Sonia ordered, the baby would be more comfortable at the Underground sanctuary. While Sonia and Sonic are working to uncover another plot of Robotnik they find that the baby is not a baby at all, but an android equipped with cameras to spy on the Underground. Sonia and Sonic frantically search for their brother before he, unknowingly, exposes the location of the secret sanctuary. Written by Anonymous

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HD Dunes Day

Dunes Day

EPS23

Dunes Day - EPS 23

HD
IMDb: 6.0
0
22 min

Sonic and his siblings travel to the outskirts of Mobius to recruit a tribe of nomads for the Resistance.

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HD Mummy Dearest

Mummy Dearest

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Mummy Dearest - EPS 24

HD
IMDb: 5.9
0
22 min

Sonic, Manic and Sonia invade Robotnik's lair to retrieve the Hedgehog crest.

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HD The Hedgehog in the Iron Mask

The Hedgehog in the Iron Mask

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The Hedgehog in the Iron Mask - EPS 25

HD
IMDb: 4.6
0
22 min

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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HD Six Is a Crowd

Six Is a Crowd

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Six Is a Crowd - EPS 26

HD
IMDb: 5.1
0
22 min

The Oracle advises the Hedgehogs to undertake a mission which could reveal answers about their future.

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HD Flying Fortress: Chaos Emerald Crisis Part 1

Flying Fortress: Chaos Emerald Crisis Part 1

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Flying Fortress: Chaos Emerald Crisis Part 1 - EPS 27

HD
IMDb: 5.8
0
22 min

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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HD No Hedgehog Is an Island: Chaos Emerald Crisis Part 2

No Hedgehog Is an Island: Chaos Emerald Crisis Part 2

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No Hedgehog Is an Island: Chaos Emerald Crisis Part 2 - EPS 28

HD
IMDb: 5.6
0
22 min

Sleet and Dingo escape the Flying Fortress with the Chaos Emerald.

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HD New Echidna in Town: Chaos Emerald Crisis Part 3

New Echidna in Town: Chaos Emerald Crisis Part 3

EPS29

New Echidna in Town: Chaos Emerald Crisis Part 3 - EPS 29

HD
IMDb: 5.4
0
22 min

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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HD Wedding Bell Blues

Wedding Bell Blues

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Wedding Bell Blues - EPS 30

HD
IMDb: 7.2
0
22 min

Robotnik announces that he will marry Queen Aleena in a plot to become the king of Mobius.

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HD Country Crisis

Country Crisis

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Country Crisis - EPS 31

HD
IMDb: 5.1
0
22 min

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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HD Haircraft in Space

Haircraft in Space

EPS32

Haircraft in Space - EPS 32

HD
IMDb: 5.7
0
22 min

Robotnik is using the local hairdresser, Doo-bot, to get information on the citizens that are against him.

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HD Healer

Healer

EPS33

Healer - EPS 33

HD
IMDb: 6.0
0
22 min

A self proclaimed scientist has come to Robotropolis with a device that will reverse the effects of Robotnik's robotisizer.

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HD Sonia's Choice

Sonia's Choice

EPS34

Sonia's Choice - EPS 34

HD
IMDb: 5.4
0
22 min

Robotnik has arranged a museum exhibit of the Royal family goblets.

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HD The Big Melt

The Big Melt

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The Big Melt - EPS 35

HD
IMDb: 5.0
0
22 min

The Hedgehogs vacation is interrupted by the news of Robotnik's latest weapon.

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HD Sleepers

Sleepers

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Sleepers - EPS 36

HD
IMDb: 4.0
0
22 min

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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HD Bartleby the Prisoner

Bartleby the Prisoner

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Bartleby the Prisoner - EPS 37

HD
IMDb: 4.4
0
21 min

Robotnik captures Bartleby and uses him as bait to capture Sonia.

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HD Art of Destruction

Art of Destruction

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Art of Destruction - EPS 38

HD
IMDb: 4.7
0
22 min

Robotnik's new weapon, Art, is the enforcer of Robotropolis new eradication policy.

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HD The Pendant

The Pendant

EPS39

The Pendant - EPS 39

HD
IMDb: 5.3
0
22 min

The newly discovered Emerald Peninsula is a perfect place for Robotnik to add slaves to his empire.

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HD Virtual Danger

Virtual Danger

EPS40

Virtual Danger - EPS 40

HD
IMDb: 6.3
0
22 min

Sonic and Manic play a game of virtual reality to enhance their pilot skills.

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