Sonic Underground

Watch Sonic Underground

  • TV-Y7
  • 1999
  • 2 Seasons
  • 6.1  (3,160)

Sonic Underground was a children's animated television series that aired on UPN from 1999 to 2000. The show was based on the popular video game character Sonic the Hedgehog and followed the adventures of Sonic and his siblings, Sonia and Manic, as they fought to free their home planet from the evil ruler, Queen Aleena.

The series was set on the planet Mobius, which had been enslaved and oppressed by Queen Aleena for many years. Sonic and his siblings were members of the royal family, but they had been separated at birth by their mother, who had sent them away to protect them from the queen's tyranny. As they grew up, Sonic, Sonia, and Manic honed their individual skills and abilities, and eventually came together when they learned the truth about their past and their mother's plan.

Together, the three siblings formed a band called Sonic Underground and used their music as a cover to travel across Mobius and gather allies to their cause. Sonic was the lead singer and guitarist, Sonia played keyboards and sang backup, and Manic played drums and was the group's mechanic. Along the way, they would encounter various obstacles and enemies, including Dr. Robotnik and his robotic minions, as well as other rebellious groups who were struggling against Aleena's rule.

The animation style of Sonic Underground was unique and colorful, with bright, bold colors and a distinctive character design for each of the main characters. Maurice LaMarche voiced Sonic, Garry Chalk voiced Manic, and Gail Webster voiced Sonia, giving each character a distinct personality and style. The music in the show was also a key element, with each episode featuring several original songs performed by the characters themselves. The songs ranged from rock and roll to pop to ballads, with each one adding to the overall story and atmosphere of the show.

One of the most notable aspects of Sonic Underground was its strong emphasis on family and loyalty. Sonic, Sonia, and Manic were all fiercely devoted to each other and to their mission, and the show often explored the themes of family bonds and the importance of working together to achieve a common goal. The series was also notable for its strong female characters, particularly Sonia, who was portrayed as a tough and capable warrior as well as a talented musician.

Overall, Sonic Underground was a fun and engaging children's show that combined music, action, and adventure to create a unique and memorable viewing experience. While it may not have achieved the same level of popularity as some of its more well-known contemporaries, it remains a beloved cult classic among fans of the Sonic the Hedgehog franchise.

Sonic Underground is a series that is currently running and has 2 seasons (102 episodes). The series first aired on August 30, 1999.

Sonic Underground
Filter by Source

Do you have Hulu?
What are you waiting for?
Nice! Browse Hulu with Yidio.
Ad Info - This show may not be available on Hulu
Season 2, Episode 22
22. Season 2, Episode 22
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
Season 2, Episode 21
21. Season 2, Episode 21
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
Season 2, Episode 20
20. Season 2, Episode 20
October 22, 1999
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.
Season 2, Episode 19
19. Season 2, Episode 19
May 29, 2000
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.
Season 2, Episode 18
18. Season 2, Episode 18
May 29, 2000
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.
Season 2, Episode 17
17. Season 2, Episode 17
October 19, 1999
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.
Season 2, Episode 16
16. Season 2, Episode 16
May 22, 2000
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.
Season 2, Episode 15
15. Season 2, Episode 15
October 15, 1999
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.
Season 2, Episode 14
14. Season 2, Episode 14
October 14, 1999
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.
Season 2, Episode 13
13. Season 2, Episode 13
May 1, 2000
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.
Haircraft in Flight
12. Haircraft in Flight
January 1, 1988
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.
Season 2, Episode 11
11. Season 2, Episode 11
October 11, 1999
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.
Harmony of Something
10. Harmony of Something
January 1, 1988
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.
New Echinda in Town
9. New Echinda in Town
May 4, 2000
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.
Getting to Know You
8. Getting to Know You
December 9, 1999
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.
No Hedgehog is an Island
7. No Hedgehog is an Island
January 1, 1988
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.
6. Beginnings
January 1, 1988
The history of the Underground is told in detail, from the fall of Mobotropolis to the rise of Robotnik. Included, is a prophecy, as told by the Oracle of Delphius, that caused Queen Aleena to give up her own children so that all people of Mobotropolis could one day be redeemed. As the Queen's children grow and witness tragedy all around them, they soon learn that they are not alone in their urge to fight the evil Robotnik, they have each other, and that fighting for freedom isn't only their duty, but their destiny.
Flying Fortress
5. Flying Fortress
January 1, 1988
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.
September 28, 1999
The Oracle advises the Hedgehogs to undertake a mission which could reveal answers about their future. Sonic, Manic and Sonia are thrown into a universe that almost seems to parallel their own, however in this dimension, they are not the in the Underground, the Hedgehogs are the rulers of Mobius. Confused by this world, they begin to explore and suddenly find themselves confronted by a corrupted version of themselves.
The Hedgehog in an Iron Mask
3. The Hedgehog in an Iron Mask
August 3, 2000
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. This stranger is actually being used as bait for another attempt by Robotnik to capture them. The stranger creates a rift between the siblings, which leaves the Underground disbanded, vulnerable and ultimately trapped. The Hedgehogs find a way to escape the prison walls that held their mother captive many years ago.
Mummy, Dearest
2. Mummy, Dearest
January 3, 2000
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.
Dunes Day
1. Dunes Day
January 1, 1988
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.
Where to Watch Sonic Underground
Sonic Underground is available for streaming on the UPN website, both individual episodes and full seasons. You can also watch Sonic Underground on demand at Amazon Prime, Vudu, The Roku Channel Free, Google Play, Hoopla, Apple TV and Pluto TV.
  • Premiere Date
    August 30, 1999
  • IMDB Rating
    6.1  (3,160)