[[quoteright:320:http://static.tvtropes.org/pmwiki/pub/images/Sonic_Underground_7556.jpg]]
[[caption-width-right:320:Left to right: Sonia, Sonic and Manic.]]

Adapted from a French cartoon called ''Sonic le Rebelle'', '''''Sonic Underground''''' is the third ''[[SonicTheHedgehog Sonic]]'' AnimatedAdaptation made. It was produced by Creator/DICEntertainment.

Sonic and his two siblings, Sonia and Manic, are left by Queen Aleena as [[DoorstopBaby Doorstop Babies]] to families, each of a different class. Eventually, they meet together when grown up, and guided by the Oracle of Delphius, they set out to thwart Robotnik, find their mother, and form the Council of Four.

Thanks to so many original characters and the omission of almost all the official characters existing at the time, despite there being potential room for them (Cyrus could easily have been Tails), and since many of the background characters were more alien than any Earth-based animal, many ''Sonic'' fans and even fans of the series debated that it was really even intended to be a ''Sonic'' show, and that the characters of Sonic and Dr. Robotnik were just a hook for ''Sonic'' fans. Even the series plot is basically a ThisIsYourPremiseOnDrugs take of the Sonic vs. Robotnik story.

Regardless of the characters used, it was most likely the "hook" for the show that resulted in its thorough panning. This was that the ''real'' premise of the show was that Robotnik had banned all music, and our three protagonists were {{Musical Assassin}}s with ThePowerOfRock. Each episode's climax would inevitably be a song performed by the triplets, often with AnAesop based on the events of the episode.

Not to be confused with the [[WesternAnimation/SonicSatAM two]] [[AdventuresOfSonicTheHedgehog other]] [[WesternAnimation western animated]] series based on Sonic the Hedgehog, the {{Anime}} series ''SonicX,'' the {{OVA}} ''SonicTheHedgehogTheMovie,'' or the game that helped to [[CutShort kill it off]] that same year, ''SonicAdventure.''

Now on DisneyXD and {{Netflix}}.

After 10 years of being CutShort, [[http://www.bumbleking.com/forum/viewtopic.php?f=4&t=6519&start=30 the story will conclude]] in the [[ArchieComicsSonicTheHedgehog Archie Sonic Comic's Sonic Universe]]. [[DevelopmentHell Maybe]].
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!!''SonicUnderground'' provides examples of:

* ActionGirl: Sonia.
* AnAesop: Almost every song in the show.
* AnimationBump: Occasionally, most prevalent in the opening.
* TheArtfulDodger: Manic.
* ArrangedMarriage: Sonia to Bartleby, and Queen Aleena to Robotnik in one episode.
* ActionHoggingOpening
* AutobotsRockOut
* BadassMustache: Dr. Robotnik.
* BigFancyHouse: Sonia used to live in one, and her friend Mindy does at the start of "The price fo Freedom."
* BlueBlood: The various aristocrats.
* BreadAndCircuses[=/=]AristocratsAreEvil: The series shows [[FridgeLogic how Robotnik can afford to stay in power]]. The upper-class aristocrats can either provide his funding, or lose their land and privileges, and risk being roboticized.
* BrokenAesop: The 21st episode involves a seller with one of the Queen's gems and willing to sell it at a high price. The trio doesn't have the money and Manic ruefully recommends '[[StickyFingers acquiring it.]]' Sonia and Sonic are disgusted with Manic's thieving skills and shoot it down, [[{{Hypocrite}} even though they have stolen things before]] and Manic has taken things that saved their lives. Later Sonic's ingenious way of getting Sleet and Dingo out of their ship is to flood it with gallons upon gallons of unpaid for olive oil.
* ButtMonkey: Dingo, and Robotnik at times.
* CanonForeigner: Besides most of the main characters, a notable example is Cyrus, a lion and member of the resistance movement.
* CanonImmigrant: Knuckles's grandfather, Athair, was a character from the Archie ''Sonic'' comics.
* CatchPhrase: Much of Sonic's catch phrases from ''Adventures'' and ''[=SatAM=]'' were carried over, along with a few new ones, such as "Bummer mejores!".
* CharacterDevelopment: Yes, there actually was some. In the beginning, Sonia was pretty whiny, prone to complaining whenever her appearance was tarnished. Later in the series, she becomes more of a leader figure, and is easily the most focused of the siblings.
* ChattyHairdresser: The Do-Bot, who turned out to be a spy for Robotnik.
* ColorCodedForYourConvenience: The lasers their instruments shot were color-coded.
* ChromaticArrangement
* CutShort: They made a vow their mother will be found... but she never was. The series ended early. [[http://www.bumbleking.com/forum/viewtopic.php?f=4&t=6519&start=30 Until now!]]
* DeadpanSnarker: Sleet.
* DeathByGenreSavviness: In "Wedding Bell Blues," the hedgehogs know Robotnik's wedding to Queen Aleena is a trap, but fall into it anyway on the off-chance Aleena is actually there.
** In another episode, in a call back to a ''Sonic Satam'' plot, Robotnik challenges Sonic to a race. Sonia and Manic, figuring Sonic couldn't resist, show up to try and rescue him...except he knew it was a trap and ''didn't'' show, and ''they'' have to be rescued.
* DeusExMachina: Queen Aleena made sporadic appearances to save the hedgehogs at times.
* DisguisedInDrag: Sonic and Manic have no qualms with dressing up as ladies to fool Robotnik and his goons.
* DishingOutDirt: Manic, who can cause earthquakes.
* DisappearedDad: No mention has ever been made to Aleena's husband/the siblings' father. Not even in the Mirror Universe.
* DissonantSerenity: Early in the series, there was a strange problem with the animation where the characters would be smiling, even when talking about something depression or when something bad was happening. This was fixed as the series went on.
* DoorstopBaby: Sonic and Sonia; Manic was stolen from his.
* DumbMuscle: Dingo.
* EasyAmnesia: Sonia in "Who Do You Think You Are?"
* EightiesHair: Sonia and Manic.
* EpisodeTitleCard
* EverythingsBetterWithSpinning: Sonia's Super Twirl.
* EvilDebtCollector: Sleet and Dingo are this to both the aristocrats and the people of Mobodoon.
* ExpositoryThemeTune
* FailureIsTheOnlyOption/ CosmicPlaything: When Sleet and Dingo do their jobs of trying to capture Sonic, Sonia, and Manic, they fail. When the come up with plans that would mess up Robotnik... they still fail.
* FullyAbsorbedFinale: The series' story is finally getting a conclusion through the ''[[ComicBook/SonicTheHedgehog Archie Sonic the Hedgehog]]'' comics. Specifically, through ''Sonic Universe''.
* GossipyHens: Sonia chatting with her hairdresser turned deadly when it was revealed she was a spy.
* GroupHug: Seen a lot.
* HalfwayPlotSwitch: Used, and nearly invoked, in "Wedding Bell Blues." Since Queen Aleena didn't show for her forced marriage to Robotnik, they'll instead crown Sonia queen in her stead.
* HarsherinHindsight: The scene the series ends on consists of the three hedgehogs remotely flying cargo aircraft into the side of a skyscraper...
* HoistByTheirOwnPetard: In episode 5, "Mobodoon", the gang tries to defend the town from Robotnik by using their musical instruments, but the musical number they performed earlier drained their power.
* HoverBoard: Manic's, though Sonic was shown with one in a single episode.
* InNameOnly: The only connections to the video games are Sonic, Dr. Robotnik, Knuckles, and the Chaos Emerald.
* IdenticalStranger: In parallel universes, the main cast have doppelgangers.
* {{Idiosyncratic Wipe|s}}: Just the one: Sonic's guitar rotating toward and then away from the screen while an echoing chord plays.
* InstrumentOfMurder
* JerkWithAHeartOfGold: Despite his wealthy lifestyle, cowardice, and the threats to his life should he turn his back on Robotnik, Bartleby has helped the hedgehogs at times.
** In return, they broke him out of prison near the end of the series.
* KleptomaniacHero: Manic.
* LaserGuidedAmnesia: Happens to Sonia in one episode.
* LeftHanging: [[http://www.bumbleking.com/forum/viewtopic.php?f=4&t=6219 Averted after 10 years of playing it straight.]]
* {{Leitmotif}}: Aleena's theme, an ethereal electric guitar riff.
* LoveTriangle: Started out with Bartleby and Cyrus competing for Sonia's affection, then became one between her, Cyrus and Knuckles.
* MadeOfExplodium: The SWAT-bots tend to explode whenever damaged.
* MadnessMantra:
-->'''Emerald-powered Dingo:''' CHAOS...I...WANT...CHAOS!
* MamaBear: Queen Aleena shot down some Swatbots to save Manic from being roboticized.
* MeaningfulName: Sonia and Manic both make the word "Sonic" when "ia" and "ma" are removed from their respective names.
* MechaMooks: SWAT Bots.
* TheMentor: The Oracle of Delphius.
* MessyHair: Manic has it.
* MindControlDevice: The darts in "Bug!"
* MirrorUniverse: The hedgehogs entered one where they were the tyrants and Robotnik was a Freedom Fighter. It ended with them [[HeelFaceTurn redeeming]] their evil counterparts. Strangely, there was no mirror Aleena.
* TheMole: Cyrus in his debut episode.
* MrViceGuy: Manic can't seem to get out of his old habit of stealing.
* MusicalAssassin: All three of the hedgehogs.
* MythArc: Later episodes had more of a StoryArc, with the hedgehogs meeting Knuckles and Cyrus, and Bartleby joining the side of good.
* MythologyGag: In the first episode, we can see Uncle Chuck and Sonic in Uncle Chuck's base from ''[[WesternAnimation/SonicSatAM Sonic the Hedgehog]]''. When Robotnik is taking over, we can see a statue of King Acorn (also from ''[=SatAM=]'') crumble.
* NeverSayDie: Averted in the second episode when the trio fail a training exercise.
-->'''Sonic:''' "I got us killed."
* NiceJobBreakingItHero: A lot of trouble could have avoided if the Oracle hadn't told Robotnik about their plan to overthrow him.
* NoEnding: The show was cancelled before an ending could be written; the final episode doesn't resolve anything. [[http://www.bumbleking.com/forum/viewtopic.php?f=4&t=6519&start=30 So the comic will!]]
* NonIdleRich: The Duke of Argonia, who uses his wealthy lifestyle to aid poor Mobian kids.
* OffModel: Plenty of weird faces and cut-off[=/=]unfinished body parts populate the series.
* OneWingedAngel: A Chaos Emerald-powered Dingo turns into a giant, unstoppable blob who nearly destroys Mobius.
* PhotographicMemory: Sonia.
* ThePowerOfFriendship: This powers the hedgehogs' instruments.
* ThePowerOfRock
* PrinceCharmingWannabe: Bartleby Mink, though he didn't start like it; at first Sonia reciprocated his affections to a degree.
* ProtestSong: The band had a few in their repertoire, such as "Justice Calling" and "The Sound of Freedom".
* RemakeCameo: Phil Hayes, Gary Chalk and Ian James Corlett, who voice Bartleby, Dr. Robotnik and Knuckles respectively in this series, voiced Scratch, Grounder and Coconuts in AdventuresofSonicTheHedgehog.
* RePower: Famously super fast, Sonic gets...ThePowerOfRock.
* RichSuitorPoorSuitor: Bartleby of the high class, haughty variety, and Cyrus, the street smart resistance member. Sonia's also shown affection for Knuckles, who doesn't really fit into either category.
* RidiculouslyHumanRobots: While there are exceptions, such as Argus's roboticized form, most roboticized Mobians don't look much different from their regular selves. Some even look almost completely Mobian except for cybernetic eyes or limbs.
* RoboticReveal: [[spoiler: Ifyoucan]].
* RockTrio: The triplets, naturally, with Sonia playing keyboard instead of bass guitar.
* RoleReprisal: Jaleel White returns as the voice of Sonic and also voices Sonia and Manic.
** TheOtherDarrin: Though Sonic's singing voice is done by Sam Vincent, who would later voice Bugs Bunny in Baby Looney Tunes.
* SadisticChoice: In the aptly-named "Sonia's Choice", she must choose whether to save Sonic or Manic from the roboticizer. Sonia chooses [[spoiler: Sonic]]...and Queen Aleena ends up saving [[spoiler: Manic]].
* ScoobyDoobyDoors: {{Downplayed}} when Sonic gets lost while navigating the Flying Fortress.
* ScrewTheMoneyIHaveRules: A recurring theme on this show is aristocrats giving up their wealth to help the hedgehogs, such as Mindy and [[spoiler:Bartleby]].
* {{Shapeshifter}}: Dingo can morph into just about anything with Sleet's morphing device.
* ShoutOut:
** Manic's hoverboard looks like a Federation Scoutship from the ''Series/StarTrekTheNextGeneration'' movies.
** The end of "Bartleby the Prisoner" is one to ''{{Casablanca}}''.
* SiblingYinYang: Sonia is an upper-class, responsible girl who hates getting dirty. Manic, on the other hand, is a laid-back street rat who's lived in the sewers most of his life.
* SilenceYouFool: Possibly this Robotnik's catchphrase in the show, usually used against Sleet and Dingo when they try to explain themselves about why they are incompetent.
* SitOnTheCamera: in episode "The Jewel in the Crown" when Dingo sits on Manic's remote controlled bug. "I think I sat on a bug."
* TheSmartGuy: Cyrus.
* SpoiledSweet: Mindy [=LaTour=].
* TheStarscream: Sleet and Dingo try to be this when they snatch a Chaos Emerald from Robotnik. It doesn't quite work out.
* StatusQuoIsGod: Played straight with the main story, especially as there was no finale, but averted with Bartleby joining the Resistance.
* StickyFingers: Manic.
* SurferDude: Manic.
* ThemeTuneCameo: Lots of times.
* TheRenaissanceAgeOfAnimation
* ThereWasADoor: Sleet and Dingo have an exchange in episode 2:
-->'''Sleet:''' Go in and help the metalhead. Go!
-->'''Dingo:''' Y-you mean through the door there?
-->'''Sleet:''' [[DeadpanSnarker No, through the wall, genius.]]
-->'''Dingo:''' [[DoesNotUnderstandSarcasm Okey-dokey!]] *charges through the wall*
* ThoseTwoBadGuys: Sleet and Dingo.
* TotallyRadical
* TrademarkFavoriteFood: Again, chili dogs.
* TransformationRay: Sleet has one for use on Dingo.
* UpperClassTwit: Bartleby Mink.
* WeddingSmashers: The hedgehogs try and crash Queen Aleena's forced marriage to Robotnik, except there was never one to begin with as she didn't show.
* WhatKindOfLamePowerIsHeartAnyway: Sonic has SuperSpeed. Sonia has SuperStrength. Manic...can pick locks.
** HeartIsAnAwesomePower: Which helps a lot in sneaking in and out of Robotnik's base.
* WhyDidItHaveToBeSnakes: Sonic's fear of water comes into play in a few episodes.

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