[[quoteright:300:http://static.tvtropes.org/pmwiki/pub/images/YinYangYo_4220.jpg]]
-->''"In a world of chaos and disarray''
-->''Brother and sister save the day!"''

-->''"When might and magic work as one''
-->''A villain's plan can be undone!"''

''Yin Yang Yo'' is an AnimatedSeries which aired in ToonDisney's Jetix block (later DisneyXD). It retains the same creative team behind {{Nickelodeon}}'s ''WesternAnimation/TheFairlyOddparents'' and ''WesternAnimation/DannyPhantom'' so naturally [[SignatureStyle there are quite a few similarities]].

Yin and Yang are twin rabbits: Yin, the studious and socially aware girl, is constantly mortified and embarrassed by her dirty, disheveled, violent, greedy and self-indulgent (but still miraculously on the side of good) brother, Yang. Together, they study the ancient art of Woo Foo under the tutelage of the grumpy [[OldMaster old panda Master Yo]], who once had his own Woo Foo glory days.

Yin's studies are Woo Foo magic while Yang's are Woo Foo combat, hence the "might and magic" standard above. They both are eager to prove themselves, partly because they want to master what they've learned, but also because the BigBad has rendered it so ''the entire world'' thinks Woo Foo is stupid and laughable. The problem is that, as twins and polar opposites, they get on each other's nerves and get in each other's way often but, when they do finally set aside their differences and actually work together, they prove to be very formidable.

Feel free to contribute to the [[Characters/YinYangYo Character Sheet]]

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!!'''This series provides examples of:'''
* ActionGirl: Yin and eventually Lena after she learns how to use Woo Foo.
* AddedAlliterativeAppeal
** [[spoiler: AlliterativeFamily]]
** AlliterativeTitle
* AerithAndBob: Aside from the titular protagonists who have names derived from the Taoist philosophy, there's normal English names like Dave, Lina, Roger, and Coop. Then there are names like Ultimoose and [[SpellMyNameWithAThe The Boogeyman]].
* AffectionateGestureToTheHead
** In "Dojo Oh No", Master Yo rubs Yin's head to comfort her while she's upset.
** Saranoia also does this briefly in "Bad Nanny Jamma" while assuring Yin will grow up to become successful.
* AffectionateParody: Incredibly common along with a few ShoutOut moments. Only some include…
** The episode "Wonder Tweens Go!" is just a huge AffectionateParody of ''WesternAnimation/TeenTitans''. There’s also Yin's outfit which is also very similar to SailorMoon.
*** Doubles as HeyItsThatVoice UpToEleven.
** Then there's "Camp Magic Pants" which is an obvious parody of Literature/HarryPotter.
** "An Inconvenient Tooth" is entirely based off the LooneyTunes shorts of Bugs Bunny and Elmer Fudd. The list goes on.
* AllGirlsLikePonies: Or Twonicorns, as the case may be.
* AllGirlsWantBadBoys: Yin seems to fall instantly for anyone she knows, if they become tainted with evil. Even Coop the chicken. [[EspeciallyZoidberg Especially Coop the chicken.]] It becomes very plot relevant in "Gone-a-Fowl."
* AlphabeticalThemeNaming
* AmazingTechnicolorWildlife
* AmbiguouslyGay: Carl, The Evil Cockroach Wizard... mainly because of his accent.
** He once used a giant robot in the shape of a giant pink stiletto-heeled stripper-boot, he's been seen being fitted for a dress by his mother (who the dress wouldn't fit, of course, as she's a dragon (don't ask), with no sign that it was unwilling, and that's just the tip of the iceberg. Carl's accent is the straightest thing ABOUT the character.
*** Kinda leads to Carl's mother [[TheUnFavorite not liking him]] into rather [[UnfortunateImplications uncomfortable overtones,]] doesn't it?
* AndNowYouMustMarryMe: A non-villainous example in "For The Love of Clamboy": Yin accepts the jewel from Clamuel and agrees to be his "super special friend" when all she really wanted was the jewels. According to his tradition, she has to marry him.
* AnimationBump: The animation seems to improve in the second season.
* AnimalBattleAura: A Woo Foo Aura, which is in the shape of the animal that makes it.
* ArtifactOfDoom: Ironically, most of the power items are in Yo's Woo Foo Armory, but the villains get their hands on it and HilarityEnsues.
* ArtisticLicenseBiology: All the animal characters such as Yin and Yang, Master Yo, Yuck, Lina (a dog), and Coop would certainly have tails yet none of them do. In addition, there's also the fact some of the characters have floating ears yet can hear out of them just fine.
** [[LampshadeHanging This is even mentioned in "A Walk In The Woods":]]
--> '''Master Yo''': I'm looking for a couple of children: lazy, pink and blue, ears ain't attached to their heads... no tails.
** In "Yin Yang You", Yin, Yang, Lina, and Carl being trapped inside the real world causes them to slowly change into anatomically correct animals. To all four of them, this is ... less than good. To different degrees:
** Yin and Yang are upset, since they have trouble controlling their "hoppy" legs and can't hold things with their paws.
** Lina is mainly just annoyed, because "talk to the paw" is a terrible CatchPhrase.
** Carl is grossed out over becoming a real cockroach but is too distracted by his latest scheme to pay it too much mind.
* ArtShift: There are a few scenes which are drawn to look like a children's picture colored with crayons:
** "Gone-A-Fowl" has the slideshow done by Yang.
** "For The Love of Clamboy" has a demonstration of the Super Special Friends ceremony also done by Yang.
** "Upstanding Yuck" during Yuck's flashback.
* BadFuture: The premise of "Deja Foo", Yang creates a future where Ultimoose becomes the new Night Master when he found the Amnesulet but he managed to hit the ResetButton on it. [[spoiler:When Yang use this as a advantage to start deliberately hurt others in attempt to get revenge, it's even worse when he forgot about the Amnesulet and got Yin and Master Yo killed by Ultimoose in the process!]] Yang managed to prevent the future from happening by being nice this time around and stopped Ultimoose, [[spoiler:with the help of the other villains who Yang was nice to!]]
* [[spoiler:BadassFamily]]
** BadassAdorable: The cute, Technicolor rabbits Yin and Yang who look harmless at first glance but certainly have no problem beating enemies twice their size.
** BadassTeacher: Master Yo
* BalloonBelly: Happens to Yin in "How the Cookies Crumble" and she even has [[ExposedAnimalBellybutton her umbilicus exposed]].
* BattleCry: Quite a few in particular.
** Yang: "Chee, Hoo, Wha!"
*** [[CrowningMomentOfFunny "I said 'Chee-hoo-wha', not 'Chihuahua'!"]]
** Ultimoose: "HOOH! HAH! HOOH!"
* BeCarefulWhatYouWishFor: While the official {{Aesop}} of ''Mission Yin-possible'' is "don't jump to conclusions," this trope easily qualifies as a secondary Aesop: the ArtifactOfDoom du jour, the Fuzzy Pink Slippers of Heart's Desire, will grant you your [[ExactlyWhatItSaysOnTheTin heart's desire]], [[WantingIsBetterThanHaving but they will be bound to you by magic and can't be removed until you no longer want what the Slippers gave you.]]
* {{BFS}}: Smoke’s sword which is nearly as large as she is.
* BigBad
** The Night Master in season one until he’s defeated in “Night Fall”. Eradictus then takes his place in season two.
** Ferocitus appears in the last episode of season two and seems as though he would have filled the slot for the past villains.
* BlahBlahBlah
--> '''Yang''': I chop! I smash! I-
--> '''Yin''': Blah, blah, blah.
* BoobsOfSteel: Smoke
* BookDumb: Yang who shows a few times he’s capable of witty tricks and can get the upper hand against smarter villains when he tries. He simply shows a lack of interest in general education.
* BrainsAndBrawn: Done between the twins with Yin and Yang, respectively. Although Yin is fairly well strength wise, she's much more reliant on her intelligence and magic and Yang really enjoys to hit stuff along with ObfuscatingStupidity.
* BrickJoke: This series runs on these, but the biggest one comes from ULTIMOOSE: in "The Trouble with Twonicorns", he says he wants to pick up chicks, with his horns showing [[PungeonMaster a baby chicken]] the last episode of the series has ULTIMOOSE [[spoiler:honestly attracting Coop's mom.]]
* BrotherChuck: After "Welcome to the Dark Tomorrow", Molecu-Lars vanished without any explanation.
* BrotherSisterTeam: The titular bunnies.
* ButtMonkey
** Dave who receives a fair amount of beatings and ill treatment from his friends no matter the situation. Ironically, he’s one of the strongest characters due to his ability to speak to trees and use them during battle.
** Carl and Ultimoose are often shunned and mocked by other villains due to their idiocy.
* CatchPhrase:
** Yang: "Hippity hoppity hard", "That's right!", "Pellets!" and "Two words. 'Who' 'Cares'?"
** Lina: "Talk to the hand!"
** Yuck tends to say "I'm back!" whenever he appears again. Towards the end of the episode when he thinks he's going to win he often says "Say goodbye."
* CallingYourAttacks: "Yincinerate! Yangarang! Transfoomate!" et. al.
* CanisLatinicus: "Roboticus Maximus" translates to Biggest/Important Robot.
* CardCarryingVillain: Nearly every villain in the series addresses themselves as evil but mostly "Carl, The Evil Cockroach Wizard!"
* ChainedHeat: Happens to Yang and Carl that kicks off the plot to "Get Off My Back".
* ChristmasEpisode: "Seasons Beatings"
* ComicallyMissingThePoint: Yang has an ongoing habit of doing this in response to Yin’s panic during a bad situation.
* CouchGag: After the title comes a random line from the episode, often one that sounds horribly wrong out of context.
* CoveredInMud: In "Basic Yin-Stinct", Yin struggles to decide which path of a fork in the road to take while Yang drives them on a scooter. Due to failing to make a decision fast enough, the scooter runs into a tree and sends her flying into mud.
--> '''Yin''': Mud? I don't land in mud!
* CreepyDoll: The doll Yang wins for Yin in "A Toy Story" is this, only because Zarnot is controlling it from the inside and tries to kill Yang.
* CrystalBall: Saranoia and Carl both have these to spy on the twins occasionally.
* CuteBruiser: Being pink and blue bunnies, both twins do qualify.
* DarkActionGirl: Saranoia, Smoke, and Ella Mental.
* DeadpanSnarker:
** Lina, Ella Mental, and G.P.(Fr-ped), specially toward Saranoia the latter.
** Carl can be ''very'' snarky towards his mother.
--> '''Edna:''' Try not to embarrass me.
--> '''Carl:''' Well, it'll be hard to compete with ''that'' gown.
* DeflectorShields: Foo Field
* DepartmentOfRedundancyDepartment: "Power doesn't make you evil. Being evil makes you evil!"
* DisproportionateRetribution: Yuck tends to do this a lot.
** In "Yin Yang Yuck!", he decides to walk right in the middle of a busy street, causing cars to crash into each other. When an angry driver honks at him, Yuck replies "Beep at me again. See what happens." The driver does and so Yuck decides to beat the crap out of him.
*** Also in "Yin Yang Yuck!", when Master Yo refuses to train Yuck, Yuck responds by trying to kill him.
** In "Imperfect Fooplicates", a fooplicate claims that he doesn't want to go to the ice cream shop, the place Yuck ordered they go to. Yuck's response: throw a blast at him and yell [[ControlFreak "You'll do what l say!"]]
* DoesNotLikeShoes: Most of the characters go around barefoot.
* DoesThisRemindYouOfAnything: Amongst many edgy jokes in “Fighting Fooberty”, Yang’s jittery, eager response to Lina is incredibly similar to a boy experiencing arousal.
* DoomyDoomsOfDoom
* DragonsUpTheYinYang: No pun intended.
* DramaticDrop: Yo, on the occasion of realizing his students are about to let SealedEvilInACan out.
* DramaticThunder: Used at the end of "Upstanding Yuck" when Yuck [[spoiler: becomes evil again.]]
-->'''Yuck''': You wanted me to [[spoiler: be evil again? Ha! I'm evil again!]] (cue lightning) [[LampshadeHanging And there's the lightning to prove it]].
* DumbMuscle: Indesructo-Bob, emphasis on ''dumb''.
* EvenBadMenLoveTheirMamas: Both Carl and Herman love Edna and try to impress her through their evil deeds.
* EvilCounterpart: Yuck who was created accidentally by Yin and Yang's bad qualities such as Yin's obsession with control and Yang's aggression.
** Even so, he tries to subvert this in Upstanding Yuck. [[spoiler: He fails...]]
* EvilIsHammy
* EvilLaugh: Most of the villains have one.
* EvilRedhead: Smoke and Ella Mental
* EvilSorcerer
** Carl The Evil Cockroach Wizard
** The Night Master is also a sorcerer, albeit more competent.
** Saranoia is the female variant, albeit much crazier.
* EvilTastesGood:
** In "Dance Dance Devastation", Carl buys ingredients for his evil cookie. When he comes across evil butter, he licks it and says it's "evil-licious".
** When Yin hides inside of a cheese cake in "Mission Yinpossible", she comments that it's "evilly rich".
* EvilerThanThou: Played for laughs between Carl and his brother Herman.
* ExcitedShowTitle
* EyeScream: In "This Yang Isn't Brought To You By", a toy that Yang advertises called "Eye-Biters" is a pair of glasses that sprout miniature bear traps and crush the wearer's eyes.
* EyedScreen
* FantasticSlur: At times the villains will address those who use Woo Foo, particularly Yin and Yang, by the term "Woo Fools".
* FantasticVoyagePlot: "Voyage to the Center of the Yo"
* FirstKiss: Yin hopes to have this in "Falling Yin Love". Yin really grows to like Brett and the two of them do kiss in the end. [[spoiler: It's revealed to be Yuck and Yin's kiss provided him with enough power to regain his physical form.]]
* FlyingBroomstick: Used in "Camp Magic Pants".
* FootsieUnderTheTable: Yang and Lina do this in "For The Love of Clamboy" while doing research about the life of clams. When Yang finds a startling fact, this conversation stirs up:
--> '''Yang''': Oh my gosh, Yin!
--> '''Lina''': No, it's Lina. You didn't think you were playing footsies with your sister, because that is weird.
* FountainOfYouth: Master Yo
* FourFingeredHands: used but subverted with the Manotaur who has five instead.
* FunWithAcronyms: In an attempt to stop Yang from advertising dangerous toys, Yin decides to form an alliance against him titled Mothers Against That Jerk Yang. When trying to shorten it into an acronym, she obviously struggles to pronounce it. A woman standing by then suggests they title it "S.A.M.A.N.T.H.U.H".
* GettingCrapPastTheRadar: Various.
** Yang yelling "Pellets!" whenever he's annoyed in general.
** The sheer amount of time they use the word "sucks" (as in "This sucks!!") is mind-boggling, especially for family friendly Disney.
** Every single scene of "Fighting Fooberty" is sufficient to make anyone over the age of 12 slightly green in the face.
** A scene in "Basic Yinstinct" has Yang get away with calling Yin flat chested.
** In "Yin Yang Yuck!", Yuck comes out of the bathroom laughing about how hard it is to get "blood and car parts off your knuckles".
** In "Camp Magic Pants", there is a giant gold statue of pants in the camp and winning a game allows you to touch it. Yang comments, "Is it alright if I touch it in the ankle area?" Yin also later says, "...Down in the ankle area so there's nothing creepy about it."
** In "Master Dave", Yang exclaims at the beginning of the episode, "Go for the nuts, Yin. I mean the bolts too, but go for the nuts."
*** From the same episode, Carl says, "Yes, yes, honestly! I mean, I'm trying to be all evil and rampage-y here, and you keep sticking your beak in my business, which sounds a lot dirtier than it actually is..."
** In "The Hex of the Ex" Yin is going through a montage of rejecting Coop. The final scene shows theme in a [[{{Hell}} fiery area]], where Yin states "It has not, as of yet frozen over.

* GoodAngelBadAngel: Yang has this in "Deja Foo".
** Yuck sort of has one in "Personality Problem": the difference being is that he has a girl half and a boy half and they're both evil. Yuck shows discomfort and anger at having a female half.
* GoshHornet
** Bees attack Yang in "How the Cookie Crumbles" and "Today You are a Bear"
** Lena gets attacked by them in "Zarnot's Girlfriend."
* GranolaGirl: Yin
* GratuitousForeignLanguage In "Dance Dance Devastation", Yin and Yang briefly sing in GratuitousSpanish...then GratuitousGerman.
* GreenLanternRing: Yin's magical abilities
* GroinAttack: In 'Gone-A-Fowl', Boopy Von Ha-Ha Pants kicks Master Yo in the head multiple times, then in the crotch.
* GrossOutShow: There’s plenty of belching, farting, and a few poop jokes here and there.
* GrossUpCloseUp: When Carl turns the twins ugly in "A Bad Case of the Buglies".
* HalfDressedCartoonAnimal: A good portion of the characters go about in only a shirt, a belt, or some form of accessory as an outfit. There is a still amount of background or side characters who wear a full set of clothing.
* HalloweenEpisode: "The Howl of The Weenie"
* HammerSpace: All of the characters seem to have this but especially Yang who can pull out his sword at any time.
* HarmlessVillain: Varies constantly with Carl. On one hand he’s an incredibly flamboyant cockroach wizard who still lives with his mother and feels the need to remind people that he’s evil. But when provoked, he can do a fair amount of damage with his magic.
* HeartSymbol: Yang leaves them behind him [where a cartoon character would ordinarily leave a puff of smoke] as a wake when he realizes his crush likes him back.
* HeelFaceRevolvingDoor
** [[spoiler:In the episode "Upstanding Yuck", Yuck was beaten up by a group to become good and then became evil again when he got beaten up by Yin and Yang one too many only to realize that he was good all along.]]
** In the episode "Crawling with the Enemy", a disguised Carl [[EnemyMine teams up with Yin and Yang]] to take down one of Eradicus' corporations. At the end of the episode, moved by how good Yin and Yang had treated him, he removed his disguise, says that he doesn't want to be evil anymore and be friends with them. He's kicked out.
* HerCodeNameWasMarySue: Yang wrote some stories when he was younger, [[OldShame and is mortified when Yin discovers them]].
* HeyItsThatVoice: SethMacFarlane in particular as the Manotaur.
* HilaritySues
* HoistByHisOwnPetard: Yang even {{Lampshades}} it.
--> '''Yang''': Our enemies usually end up defeating themselves.
* HumongousMecha: Zarnot is a living toy robot but can become large if needed.
** In "Smorks", the Smorks create a giant Smork Bot out of multiple electronics from the dojo.
* HypocriticalHeartwarming: Yin says (on multiple occasions) that she's the only one who gets to laugh at Yang.
* HypocriticalHumor
* IAmBigBoned: Master Yo.
* IKissYourHand: This is used as a sneak tactic to remove the Foolplication charm from someone’s wrist and hide it in the mouth during “Imperfect Fooplicates”.
* IfYoureSoEvilEatThisKitten: In order to get access to the Night Master's lair and get the title, you must commit very evil acts. [[spoiler:Yin would have become the Night Mistress if she crosses the MoralEventHorizon by [[ShootYourMate killing her brother Yang.]]]]
* IncestSubtext: Some moments between Yin and Yang invoke this trope.
** "I don't have to listen to you, you're not hot anymore."
* {{Invisibility}}: well, [[CallingYourAttacks Yinvisibility and Yangvisibility]].
* InvoluntaryDance:
** In "Dance Dance Devastation", Carl puts a spell on the dance game Yin and Yang are playing that forces them to dance and sometimes sing against their will: if they don't, a monkey that keeps following them zaps the two. They later use this to their advantage and become {{Dance Battler}}s.
** Yin and Yang beat Yuck in "Camp Magic Pants" by making the gold pants dance with disco music and disobey him.
-->'''Yang''': Silly Yuck, don't you know: everyone's pants love disco.
* JerkAss:
** Yang is often called one due to his immaturity and selfish nature during certain moments, but he does show he can fairly [[JerkWithAHeartOfGold nice after learning a lesson]].
** Master Yo can act this way mainly due to being a grumpy old man and lacking patience when it comes to teachings. But much like Yang, he has a soft spot.
** Yuck is called this constantly due to being made of negativity and receiving Yang’s often brash, violent behavior.
* JokerJury: Used in "Fit To Be Tried".
* JumpingOutOfACake: A lighthearted example, being that Yin does so in Mission Yinpossible.
* KiAttacks: Magic is treated as this.
* KidAnova: Yang
* KidHero: Yin and Yang along with about every member of the Woo Foo Army. It’s never directly stated how old they are but it's implied to be around eleven to twelve years old.
* KneelBeforeZod: In "Welcome To The Dark Tommorow", Eradicus uses the Licking Stick to force Yin, Yang, and Yo into bowing before him.
* LampshadeHanging: Quite a lot.
* LargeHam
** Yang has his moments of being especially dramatic and energetic during his rants or fits of excitement.
** [[EvilIsHammy All the recurring villains are large hams.]]
* LastMinuteHookup: [[spoiler:Yin and Coop]]
* LastOfHisKind: Master Yo is quite fond of telling anyone who will listen that he is the last panda on the planet. Before training Yin and Yang, he was also the last Woo Foo warrior.
* LetsGetDangerous: Carl, when he [[spoiler: was wiping the floor with Night Master's EliteMooks in the season one finale.]]
* LoadsAndLoadsOfCharacters
* LukeIAmYourFather: [[spoiler: Yo is Yin and Yang's father]]
* MagicWand:
** Saranoia makes use of these often.
** In "Camp Magic Pants", along with {{Flying Broomstick}}s, those attending the camp are given magic wands.
* MaliciousMisnaming: Saranoia does this to Yang every time she (Saranoia) appears on the show, the nickname Mark
* ManipulativeBastard:
** [[spoiler:Yuck]] uses Yin twice for his own gain:
*** In "Falling Yin Love" he poses as her dream boy and dates her while the whole time he is actually [[spoiler: absorbing her Woo Foo to regain his physical form.]]
*** In "Camp Magic Pants" he [[spoiler: possess the headmaster and manages to make Yin become evil so she can touch the golden pants and allow him to control it.]]
** There's also Eradicus' minions that manipulate Yang into gathering up the items to revive him.
* MediumAwareness: Prominent in Season Two.
* MommasBoy: Herman, oh so much.
* {{Mooning}}: Yang does at the end of "The Yindianapolis 500" to President Muffin, despite the fact that he doesn't even wear pants.
* MorphWeapon: Yang can change his sword into a staff, nun-chucks, a jam hammer, and fruit.
* MyBelovedSmother: It's made obvious that Herman relishes his mother's doting, but when Carl briefly gets his mother's undivided love and attention in ''Mission Yin-possible'', he finds that being the favorite entails a lot more babying than he is comfortable with.
* NeverSayDie: Destroy is a common replacement for the villains though “die” is often used during more serious moments.
--> '''Master Yo''': You could have been killed!
** There's also in "Yin Yang Who?" [[spoiler: after Yin jumps in front of a Woo Foo Aura Drain, she's aware that she'll die soon.]]
--> '''Yin''': [[spoiler: That was the Aura Drain and now I'm gonna d...di...]]
--> '''Yang''': [[ComicallyMissingThePoint Dance?]] Oh great, and now I'm gonna yack. Bucket!
* NewPowersAsThePlotDemands: Lampshaded in ''Dojo Alone'' after Yin and Yang finally combine their Auras.
--> '''Yin and Yang:''' [[CallingYourAttacks Fists of Yincineration]]! Which we suddenly know we can do!
* NoCelebritiesWereHarmed: Averted - Nancy O. Delffa (and voiced by none other than Nancy O'Dell herself)
* NonStandardCharacterDesign: The clams in "For The Love of Clamboy" seem to have actual photos of clams in their design.
* NotSoHarmlessVillain: Carl in season one finale[[spoiler: even though he was helping the good guys]].
* ObfuscatingStupidity: Yang is smarter than he pretends to be but he does this in order to be able to get away with things.
* ObsessedAreTheListMakers: In "Slumber Party of Doom", Yin creates an incredibly long list of what she feels is necessary to throw the perfect sleepover that must be performed at specific times. This causes her friends to become very annoyed.
--> '''Yin''': Some say I'm obsessive, I say I'm a well oiled fun machine!
--> '''Lina''': I say obsessive.
* OffModel: A recurring error is giving Yang eyelashes or taking away Yin's.
** In the opening, Yin's eyes briefly look purple instead of blue.
* [[spoiler:OfficialCouple:]]
** [[spoiler:Yang and Lina]]
** [[spoiler:Yin and Coop]]
* PaperThinDisguise
** Done by Carl often and Yin and Yang always seem to fall for it.
** In "Mission Yinpossible", Yang only wears a mustache and Carl still couldn't recognize him.
** This is averted by Yuck who disguises himself so well not even the viewerd know it's him until the ending. These "disguises" involving [[spoiler: controlling robot suits and even body possession.]]
** Averted again this time by Badfoot who wears two convincing disguises in "Old Softie".
* ParentalAbandonment: Yin and Yang's rabbit parents have not made an appearance so far, Master Yo is their only parental figure.
** [[spoiler: Yo is somehow their father, but forced to forget by Chai and Ti when they were born. the [[MissingMom identity of their mother is still a mystery, though]].]]
* ParentalBonus
* ParentalFavoritism
** Saranoia's FreudianExcuse is that her wizard father adored his son and paid little attention her while growing up.
** Edna doesn't bother to hide that she prefers Herman over Carl.
* PinPullingTeeth: Yuck bites off the pin of a coconut shaped grenade and throws it at Yin and Yang in "Voyage To The Center of Yo".
* PinkGirlBlueBoy: Yin and Yang, respectively.
* PintSizedPowerHouse: Yin, Yang, Lina, and practically every member of the Woo Foo army, composed entirely by (insanely strong) kids.
** [[JustifiedTrope Makes sense]], for some of them, considering:
*** Dave's parents are also [[DungeonsAndDragons treants]], possibly with the same abilities.
*** Boogie Man's father also looks to be the same kind of fighter.
*** Roger Jr.'s father (and probably mother) are [[PunchClockVillain Punch clock villans.]]
*** Coop's Mother is the strongest of all... a hottie with Public Relations power.
** Carl and Herman count as well, seeing that Carl is a powerful wizard and Herman is an ant with SuperStrength.
* PlotRelevantAgeUp: Kraggler does this to Yin and Yang.
* PolarOppositeTwins: Yin and Yang
* PositiveDiscrimination
* PowerGlows: Woo Foo can be transferred into weapons, making them glow an often yellow color when especially powerful.
* PowerNullifier: The Woo Foo Aura Drain is able to drain any Woo Foo powered user of their powers as well as causing them to slowly die unless they come in contact with either of their parents to save them: [[spoiler: Yin has this done to her by Eradicus in an attempt to save her brother. She is saved by Master Yo.]]
* PowerTrio: Master Yo, Yin and Yang, as well as the Chung Pow Kitties.
* ProtagonistTitle
* PungeonMaster: Rubber Chucky.
* QuirkyMinibossSquad: Eradicus' mook squad: Ella Mental, Rubber Chucky and Indestructi-Bob.
** Molecu-Lars disappeared after their introduction.
* RealWorldEpisode: "Yin! Yang! You!"
* RedSkyTakeWarning: About anytime a villain appears and starts causing havoc, the sky turns red.
* RightBehindMe
* RoguesGallery: Carl, Zarnot, Saranoia, Herman, Ultimoose... really, half of the cast is comprised of villains.
* SealedEvilInACan: Eradicus, [[spoiler: until Yang, [[NiceJobBreakingItHero in a misguided attempt to become famous, sets him free]], ushering in [[TheEndOfTheWorldAsWeKnowIt the Dark Tomorrow.]]]]
* ShadowDiscretionShot: Coop's first transformation into Evil!Coop has one.
* SiblingRivalry
** Yin and Yang, though they get along as often as they fight
** Carl and Herman's rivalry borders CainAndAbel territory.
* SiblingYinYang: Guess...
* SickEpisode: "Woo Foo Flu" from start to finish.
* SlapstickKnowsNoGender: Though Yang receives a fair amount of slapstick, Yin and Lina tend to get hurt for the sake of laughs pretty often. The most prominent example is in “Splitting Hares” when Yin is shot off a cliff by Carl and breaks most of her bones on her way down a rocky hill.
* [[{{Smurfing}} Smorking]]: As a parody of TheSmurfs, the Smorks do this constantly.
* SplitScreen
* StalkerWithACrush: Coop constantly attempts to spy on Yin and ask her out on dates only to be shot down. Also Yang whose more subtle than Coop, but makes plenty of advances on Lina that she finds more odd than charming.
* StealthPun: At an all-bear formal party, Yang asks where the bathroom is: a bear politely indicates the woods. Yang looks confused for a moment, then smacks his forehead and says, "Duh, of course."
* StrawFeminist: Saranoia who is determined to take Yin away from her male teacher and brother because she’s convinced she’s being abused.
* SuperpoweredEvilSide: Coop
* SwordAndSorcerer: Yang’s Might and Yin’s Magic form the twins into this duo.
* TalkingToHimself:
** Yang and Yuck are both voiced by Scott [=McCord=].
** The same with Dave and Coop who are both voiced by Dwayne Hill.
* TertiarySexualCharacteristics: Yin's eyelashes and [[strike:hair]]earpin.
* TheEndOfTheWorldAsWeKnowIt: The "Dark Tomorrow".
* TheToothHurts: A prominent example in "An Inconvenient Tooth" is about Yang catching Wild Hare Tooth from his extreme lack of dental hygiene.
* TheUnFavorite
** Saranoia's rants indicate she was one of these growing up.
** Carl fits this trope even better than Saranoia, with his mother constantly praising his brother over him.
* ThemeTuneRap: Done by Kyle Massey of ''ThatsSoRaven'' and Corey In The House fame.
* ThickLineAnimation
* TitleDrop: Yin, Yang, and Yo say it as a battle cry in the Season One finale.
* TookALevelInBadass
** Dave when he discovers his powers to manipulate plants
** [[spoiler:Lina when she uses Might Woo Foo and was second-in-command of the Woo Foo army.]]
* TornadoMove: The Foo-nado of course. Also the Yuck-i-cane which has a similar purpose and able to cause a fair amount of damage through high speeding winds.
* {{Tsundere}}: Lina[[spoiler: ,she even [[LampshadeHanging lampshades]] this to Yang in Gone-A-Fowl.]]
* TwinTelepathy: Yin and Yang occasionally hit the same thought at the same time and/or finish each other's sentences when they're separated and in danger.
** Yang has used it to find Yin on occasion, though not entirely under his own control.
* TwinkleSmile: When Yuck appears in "Upstanding Yuck", there are a few quick shots of his now clean self including one of his teeth sparkling.
* UnusualEuphemism: "Pellets" and "hippity-hoppity hard" are pretty common phrases used by both Yin and Yang to express anger or annoyance. There's also quite a few ways of saying "Foo" such as "mother of Foo" or "what the Foo".
* VerbalTic
** Coop's habit of clucking in between his words.
** Rainbow Mane tends to say "and stuff" after his sentences.
* VillainTeamUp: The episode "League of Evil" has Carl, Smoke, Pondscum, and The Puffin form a team along with sharing an apartment together.
* VomitDiscretionShot: Used as a RunningGag in "Shadowcluck".
* WeaksauceWeakness
** Carl is incredibly competent and dangerous when it comes to being a wizard, but enraging him makes him act like a six year old with a temper tantrum. This is shown in the season one finale, where Carl for once isn't fighting enemies who snark at him, allowing him to focus and take out hordes of opponents.
** Herman's allergic reaction to panda fur. There is exactly ''[[LastOfHisKind one]]'' panda left, but still.
* WittyBanter: There's a small exchange in "Personality Problem" about this.
-->'''Yang''': So, should we start with some witty banter or just bring the pain?
-->'''Yuck''': Pain is good. Especially when I'm serving it-Ha! And I'm serving it up BIG TIME!
* WonderTwinPowers: The Woo Foo Aura results in a giant energy form made up of Yin and Yang working together so their BattleAura combines into a half-pink, half-blue Battle Bunny.
** Turned up a notch when Master Yo is also involved in it, his aura is green. Not surprising when you think about it.
* WoobieDestroyerOfWorlds
** Yuck in "Upstanding Yuck".
** Carl can be seen in this way. It is implied on numerous occasions that his failed attempts at being a villain efficiently and the physical abuse of his older brother, is resentment that motivates him to try to defeat Yin and Yang to impress his mother.
* XtremeKoolLetterz: Pondscum is spelled as "Pondscüm".
* {{Yandere}}: Chad 3000 in "Moon Over My Yinnie" becomes incredibly possessive of Yin and tries to kill Yang multiple times.
* YouFool: Woo Fool seems to be a popular insult amongst the villains.
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