->''"Harmony. Without it, there can be no peace. Even the most different things can co-exist with each other if there is harmony between them. Two worlds, as different as night and day, will be joined together, forever changing both when the dust settles. For one, an idyllic paradise that thrives off of everypony and everything working together. For the other, a rampant whirlwind of chaos that fuels the adventures of its inhabitants. Can the two actually be one? Some say no, as such things were never meant to be together. As this tale will show, harmony can be found in the most unlikely of places, and from the most unlikeliest of people. This is the tale of what transpired when visitors of the chaotic world entered the land of a peaceful existence. What happens then would forever change the balance of both parties, but most importantly, the visitors who first needed harmony with themselves."''
-->-- '''The first paragraph of the story.'''

''Chaotic Harmony'' is a WesternAnimation/MyLittlePonyFriendshipIsMagic[=/=]SonicTheHedgehog {{Crossover}} FanFic by [[{{Tropers/MaroxXIII}} MaroxXIII]].

After an argument splits Sonic and his friends apart, they find themselves suddenly TrappedInAnotherWorld. The series will revolve around how the characters adjust to their new setting, while uncovering a mystery that's been kept hidden in Ponyville for years.

!! List of episodes in the series so far
# ''[[http://www.fimfiction.net/story/25969/Chaotic-Harmony-Episode-1%3A-Arrival Arrival]]'': Prologue detailing how Sonic and his "friends" got to Equestria. [Finished!]
# ''Race'': Sonic vs. Rainbow Dash. [In production]
# ''Strategy'': Tails and the Cutie Mark Crusaders. (Moreso Scootaloo) [Coming soon]
# ''Adventure'': Applejack and Knuckles [Coming soon]
# ''Smile'': Pinkie Pie [[ShipperOnDeck shipping]] Amy and Sonic [Coming soon]
# ''Jewel'': ''TBA''
# ''Understand'': ''TBA''
# ''Showdown'': ''TBA''

First episode can be found [[http://www.fimfiction.net/story/25969/Chaotic-Harmony-Episode-1%3A-Arrival here]].
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!!Tropes featured in Chaotic Harmony so far include:
* [[ActionGirl Action Mares]]: Chapter 5 has Twilight defending Sonic from Eggman. [[spoiler:Rainbow Dash]] gets in on the action as well.
* AllYourBaseAreBelongToUs: Eggman completely thrashes Twilight Sparkle's library looking for...a book.
** WatchingTroyBurn
* AndKnowingIsHalfTheBattle: Twilight recites a lesson about friendship dedicated to the visitors to Princess Celestia near the end of Episode 1.
* BewareTheNiceOnes: You know Twilight Sparkle, the nerdy bookwormish unicorn that seems harmless, right? Yeah, she just stopped an incoming barrage of missiles aimed at Sonic. Not so nice now, huh?
* BigBad: Dr. Eggman.
* BigDamnHeroes: First, Twilight steps in intercepting a near fatal attack aimed at Sonic, and sends it back to Eggman. Then [[spoiler: Rainbow Dash pulls an impressive one, saving Twilight and Sonic while totally ''Sonic Rainuking'' Eggman's machine]]
* BondBreaker: Sonic and his plas split ways after a HUGE HumiliationConga wrecks havoc on Cream's birthday party. But it started earlier than that when he confessed that their friendship isn't as strong as it once was.
* BossBattle: Sonic's Encounter with Eggman is actually read like one, complete with life bars and music to match.
* TheCameo: Big the Cat makes an appearance at Cream's party.
* {{Cloudcuckoolander}}: Pinkie Pie naturally. Nobody from Sonic's world understands her.
* [[LoonyFriendsImproveYourPersonality Crazy Ponies Improve Your Friendship]]
* {{Crossover}}: [[CaptainObvious But of course.]]
** MegaCrossover: We'll see later on.
* ContinuityNod: So far, a few have been made to the MLP side, but this is averted for the Sonic universe.
* CoolAirship: Dr. Eggman's newest flagship, the Egg Skylord, appears at the end of the battle safely carrying the doc away from his captors.
* DarkSecret: Princess Celestia is implied to have one near the end of Episode 1.
* DeadpanSnarker: Sonic moreso than usual.
* DudleyDoRightStopsToHelp: Sure, he's on the run from everypony trying to get a hold of him, but even Sonic couldn't resist helping out Rarity with her new design.
* [[EveryoneChasingYou Everypony Chasing the Fastest Thing Alive]]: Somehow, they're able to keep up with him!
* FantasticRacism: The arrival of Sonic and the others is not met well with the citizens of Ponyville.
* FishOutOfWater: Thanks to Chaos Control, the gang now find themselves in Ponyville.
* FourthWallObserver: Pinkie Pie. She even comments on Sonic's rank at the end of his battle against Dr. Eggman!
* {{GASP}}: Everyoune's reaction when Sonic called Amy a stalker.
* GoodIsNotNice: Sonic made very clear that he doesn't like his "friends," hates Ponyville, and finds all of the residents there crazy. But he won't think twice about stopping Eggman from tearing Ponyville apart.
* JerkAss: Sonic.
** TookALevelInJerkass: He is one irritated dude in this fiction, mostly because since Eggman's last defeat, things around his world have been a lot more peaceful. Everyone else adjusted to a more quieter lifestyle, but for him, the lack of adventure turned him into one hell of a grump....
** JerkWithAHeartOfGold: Though that's not to say he isn't un-caring, as he did help Rarity with her dilemma even though he could've chose not to.
* LargeHam: '''Eggman.'''
* LetsGetDangerous: ''Twilight'' of all ponies, goes from freaking out over catching that hedgehog, to saving Sonic and facing Eggman head on. She even intercepted the mad doctor's missiles and fired them back at him!
* MythologyGag:
** Sonic calls himself the Fastest Thing Alive more than once.
** The first page of the "My Little Pony: Adventures in Equestria" book is taken straight from the opening narrative of the [[Recap/MyLittlePonyFriendshipIsMagicS1E1MareInTheMoon first episode]].
** How does Sonic enter Ponyville for the first time? [[VideoGame/SonicUnleashed By falling flat on his face,]] [[VideoGame/SonicStorybookSeries of course!]]
** Sonic uses one of Rainbow Dash's [[Memes/MyLittlePonyFriendshipIsMagic memetic lines]] during the duet with Rarity in chapter 4.
** [[VideoGame/SonicAdventure Eggman's first appearance in Equestria is announced by a very familiar line]] (uttered By Pinkie, no less!):
-->'''Pinkie Pie:''' Hey look everypony! Itís a giant talking egg! Hehehehe!!\\
'''Dr. Eggman:''' Silence! I am Dr. Robotnik! The greatest scientific genius in the world! You will address me as such!\\
'''Pinkie Pie:''' Okie dokie lokie...*giggle* Eggman! Hehehe HAHAHA! Eggman! Get it? Hahahah!!!
** The story mentions past season 1 episodes ''Mare in the Moon'', ''Boast Busters'' and ''A Bird in the Hoof''.
* NoHoldsBarredBeatdown: [[spoiler: Rainbow Dash goes from a Sonic Rainboom splitting the Egg Viper MK-III into pieces, to a ''Sonic Rainnuke'' to finish Eggman off.]]
* NowItsMyTurn
* PowerCrystal: The Chaos Emeralds, naturally.
* ProtectThisHouse: Ponyville Library comes under fire when Eggman arrives.
* PaintingTheMedium: Like ''Fanfic/AceCombatTheEquestrianWar'', there are links to some of the music from the Sonic franchise to be used as events in the story. WordOfGod confirms that there will be more music coming from both franchises in later episodes.
* SuspiciouslySimilarSong: "Look Your Best" is "Art of the Dress" re-written as a duet between Rarity and Sonic. And it's freaking hilarious.
* ShoutOut:
** Knuckles mentions getting lost on [[VideoGame/SonicAdvanceTrilogy Route 99]] instead of going down [[VideoGame/SonicAdventure2 Route 280]].
** Both of Celestia's guards warn Twilight if she's caught hiding the visitors, she'll be sent... ''[[FriendshipIsMagicBitch to the moooooonnnnnn.]]''
** Combined with a stealthy TakeThat: Rarity mentions how [[VideoGame/PokemonRubyAndSapphire Rubies and Sapphires]] are her favorites. To her, they're even better than [[VideoGame/PokemonGoldAndSilver gold and silver]].
* SequelHook: [[spoiler:at the end of episode 1, Eggman managed to survive that horrible beatdown Rainbow Dash gave him, Princess Celestia knows about the Chaos Emeralds, and she orders the gang to find them before more trouble ensues.]] Sonic ends the first episode telling Twilight that he's going to stick awhile longer.
* {{Wham Line}}s:
-->'''Sonic''' (to Amy): Gee, I dunno... maybe you can find somebody else to chase around. Or better yet, perhaps you can do something besides ''stalk people''.
-->'''Cream''': Mommy, what's the use of having friends, if everyone fights all of the time?
-->'''Tails''' (to Princess Celestia): Wait! How do you know about the Chaos Emeralds!?
* WeUsedToBeFriends: "They're not my friends... not anymore."
* WhosOnFirst: Happens in chapter 3 between Sonic and Owlowiscious:
-->'''Sonic''': Whew...itís just an owl. You arenít going to start talking, right?\\
'''Owlowiscious''': Who?\\
'''Sonic''': You, duh.\\
'''Owlowiscious''': Who?\\
'''Sonic''': You! Iím talking to you right now!\\
'''Owlowiscious''': Who?\\
'''Sonic''': You! You, okay!? Geez, and I thought that pink pony was annoying!\\
'''Owlowiscious''': Who?\\
'''Sonic''': Alright, thatís it! Say Ďwhoí one more time. I dare ya, birdie! [[PunctuatedForEmphasis I. Dare. You.]]
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->''"This is so exiting! Are you excited!? I know I'm excited! I've never been so excited in my life! [[{{GASP}} *GASP*]] I just can't wait! This is going to be the best cross-over ever!"''
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