Sonic Underground

Sonic Underground is an animated series featuring Sonic and his two siblings. It aired 40 episodes in one season until October 21, 1999.

Plot
The show takes place in a separate canon and continuity than any other Sonic the Hedgehog media. Queen Aleena, the kind and fair ruler of Mobius, was overthrown by Dr. Robotnik and his robotic armies. Robotnik seized control of the planet and forced her into hiding. To preserve the dynasty, Queen Aleena separated and hid her three children: Sonic, Manic, and Sonia after the Oracle of Delphius told her of a prophecy: one day they would reunite with their mother to form the "Council of Four," overthrow Robotnik, and become the rightful rulers of Mobius once more. Meanwhile, Dr. Robotnik did his best to set up an autocratic government, and legally turned anyone who stood against him in robots devoid of freewill, and forced the nobles into paying large amounts of money to him as tribute. When Sonic, Manic, and Sonia grew up, the Oracle of Delphius revealed the prophecy to them: So Sonic, Manic, and Sonia decided to go on a quest, searching throughout Mobius for Queen Aleena. Dr. Robotnik, with the assistance of the bounty hunters Sleet and Dingo, tries constantly to capture the royal family and prevent the prophecy from being fulfilled. The three siblings have powerful medallions that can change into musical instruments, and also weapons when the triplets are in perfect harmony with each other. Sonic's medallion is an electric guitar, Sonia's medallion is a keyboard that functions as a smoke machine, and Manic's medallion is a drumset that can be used as an "earth controller" with cymbals that can deflect laserfire. All of the medallions can be used as laser guns. The three use the amulets not only to fight Robotnik's forces but to also as instruments for their underground (illegal) rock band, "Sonic Underground".

Season 1
01 - 01. Beginnings

01 - 02. Wedding Bell Blues

01 - 03. To Catch a Queen

01 - 04. Mobodoon

01 - 05. The Price of Freedom

01 - 06. Underground Masquerade

01 - 07. Tangled Webs

01 - 08. The Deepest Fear

01 - 09. Who Do You Think You Are

01 - 10. The Last Resort

01 - 11. Come Out Wherever You Are

01 - 12. Winner Fakes All

01 - 13. A Hedgehog's Home is Her Castle

01 - 14. Artifact

01 - 15. Bug!

01 - 16. Sonic Tonic

01 - 17. Friend or Foe ?

01 - 18. Head Games

01 - 19. When in Rome...

01 - 20. The Jewel of the Crown

01 - 21. Three Hedgehogs and a Baby

01 - 22. Dunes Day

01 - 23. Mummy Dearest

01 - 24. Hedgehog in the Iron Mask

01 - 25. Six is a Crowd

01 - 26. Flying Fortress

01 - 27. No Hedgehog is an Island

01 - 28. Getting to Know You

01 - 29. New Echidna in Town

01 - 30. Harmony or Something

01 - 31. Country Crisis

01 - 32. Haircraft in Space

01 - 33. Healer

01 - 34. Sonia's Choice

01 - 35. The Big Melt

01 - 36. Sleepers

01 - 37. Bartleby the Prisoner

01 - 38. The Art of Destruction

01 - 39. The Pendant

01 - 40. Virtual Danger

Season 2
02 - 01. Miles "Tails" Prower is Back!

02 - 02. Sally Acorn's Here!

02 - 03. Sonic's Star Rock

02 - 04. Welcome Back Knuckles!

02 - 05. Manic's Bass-Drums Power Up

02 - 06. You Go, Sonia!

02 - 07. Tails' Singing Star

02 - 08. Sonic's Power Ring Returns

02 - 09. Dancing with the Mobius

02 - 10. Sally's Magical Music Star

02 - 11. Let's Road!

02 - 12. Knuckles at the Under-Holes

02 - 13. Manic's Got the Green-Power

02 - 14. Sonia and Sally's Wonderful Vacation

02 - 15. A Sonic Day Afternoon

02 - 16. Tails' Good Day

02 - 17. Sally at the Fashion Show

02 - 18. Sonic at the Mystic Mansion

02 - 19. Battle of the Boy Music

02 - 20. Knuckles and the Secret Emeralds

02 - 21. Chez Sonia

02 - 22. Manic's Lighting Thunder Crush

02 - 23. Sonic at the Wild Adventure

02 - 24. Girls Day Out

02 - 25. Tails' Lesson to the Rhythm

02 - 26. At the Hop

02 - 27. Thanks to Amy

02 - 28. Sally's Mission Competed

02 - 29. Sonic, Tails and Knuckles in the Three Musketeers

02 - 30. Knuckles' Weight Traning

02 - 31. Sonic and Tails and the Sidekick

02 - 32. Sonia's Dance Style

02 - 33. Manic's Cooler Bands

02 - 34. Sally and the Shiny Crystals

02 - 35. Tails at the Workshop

02 - 36. Rhythm of the Night

02 - 37. Knuckles and the Fireballs

02 - 38. Sonic, Sonia and Manic's Big Adventure

02 - 39. Sonic VS. Doctor Robotnik

02 - 40. Sonic and Friends Saves the Day

Episodes 1
00. Sonic Underground (Opening Theme)

01. Someday

02. Working Together In Harmony

03. When Tomorrow Comes

04. Have You Got The 411?

05. I Found My Home

06. Money Can't Buy

07. Let the Good Times Roll

08. Teach the Children, Light the Way

09. Face Your Fear

10. We Need to Be Free

11. Listen to Your Heart

12. Society Girl

13. Built For Speed

14. Let's Do It to It

15. You Can't Own Everything

16. Never Give Up

17. The Fastest Thing Alive

18. Not Always What They Seem

19. Take a Chance

20. Where There's a Will, There's a Way

21. The Cosmic Dance

22. Being a Kid Is Cool

23. True Blue Friend

24. We Are Sonic Underground

25. Part of the Problem

26. I Can Do That For You

27. No One Is an Island

28. Learn to Overcome

29. The Mobius Stomp

30. We're All In This Together

31. How You Play the Game

32. Don't Be a Backstabber

33. We're the Sonic Underground

34. Never Easy

35. Fun In the Sun

36. Have It All Again

37. Justice Callin'

38. The Sound of Freedom

39. Liberty's Gonna Rock

40. Don't Let Your Guard Down