Character of the WesternAnimation/YinYangYo cartoon

[[foldercontrol]]
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!'''''Main Characters'''''
[[folder:Yang]]
'''Yang'''
->Voiced by: Scott [=McCord=]

A blue, male rabbit and the twin brother of Yin. He mostly uses the Martial Arts side of Woo Foo, but he can also use the Mystic side of Woo Foo. Yang is a cuckoo, lucky, courageous character, and has a liking for clowns. Despite not usually showing it, he really cares about his sister and Master Yo's well-being. He enjoys fighting, and likes hitting stuff.
[[hardline]]

* AttentionDeficitOohShiny: Especially the case in "Brain Drain" where Master Yo grows frustrated with Yang's inability to stay focused. Though he ends up being able to use his brain towards the end, he still struggles with this.
* BadassAdorable
* BattleCry: "Chee, Hoo, Waa!"
* BloodKnight: Loves kicking butt.
* BlowYouAway: "Foonado!"
* BookDumb: He's intelligent in his own way.
* BrainsAndBrawn: The Brawn to Yin's Brains.
* BrotherSisterTeam: With Yin.
* BruiserWithASoftCenter: According to "Touchy Feelings", his strongest emotion is love.
* BlueIsHeroic
* ButtMonkey
* CallingYourAttacks
* CatchPhrase: Several.
* ChickMagnet: Has gotten the attention of Lina, Melodia, Princess of the Stink Aardvarks and even the dangerous Smoke.
* CrouchingMoronHiddenBadass: Sure he isn't as smart as his sister, but he is still a powerful warrior and capable of surprising feats and even more surprising thoughts.
* CuteBruiser
* DeadpanSnarker
* DumbAndDrummer: In "The Gig is Up", he's the drummer of the band.
* DumbMuscle: Tends to rely too much on violence to settle his problems even if he does have his moments of clarity.
* ExcuseMeWhileIMultitask: Has shown more than a few times that he's able to make wise cracks and goof off, even engaging in a full conversation with someone without looking at whoever is attacking him.
* FoolishSiblingResponsibleSibling: Foolish to Yin's Responsible.
* HalfIdenticalTwins: With Yin.
* HeinzHybrid: [[spoiler: Master Yo is his father, making him and Yin half-panda.]]
* HotBlooded
* InterSpeciesRomance: With Lina who turns out to be a dog.
* IShallTauntYou: Especially during "Yin-Credible", it's shown that he tends to get the upper hand on foes by teasing them throughout.
* ItsAllAboutMe: Tends to be rather selfish in his actions if he feels he'll achieve some sort of award in the end but it normally turns out to be a facade to hide his insecurities.
* JerkWithAHeartOfGold: The Heart of Gold aspect becomes more apparent with CharacterDevelopment.
* KidAnova
* {{Kissgusting}}: Because of his age, he hates being kissed, even if it's Lina the one who kisses him.
* LargeHam
* LoveAtFirstSight: Towards Lina.
* ObfuscatingStupidity: Yang is smarter than he initially appears, but he does this so he can get away with things and to make people not to expect anything from him. Actually lampshaded in an episode.
* OfficialCouple: With Lina.
* PintSizedPowerhouse
* PolarOppositeTwins: With Yin.
* PowerGlows: His sword glows when it is especially powerful.
* PurpleEyes
* RedOniBlueOni: Red to Yin's blue.
* StalkerWithACrush: A mild example though it's no longer the case when him and Lina become a couple.
* SwordAndSorcerer: The Sword to Yin's Sorcerer.
* {{Tsundere}}: A family-love related version with Yin and Yo, often trying to avoid showing affection or dismissing tender moments with a deadpan "whatever".
* VitriolicBestBuds: With Roger Jr.
* WhiteBunny: [[{{Pun}} Colorfully]] [[AvertedTrope averted]].
* [[WhyDidItHaveToBeSnakes Why Did It Have to Be The Dentist?]]
* [[YouGottaHaveBlueHair You Gotta Have Blue Fur]]
[[/folder]]

[[folder:Yin]]
'''Yin'''
->Voiced by: Stephanie Morgenstern

A pink, female rabbit and the twin sister of Yang. She mostly uses with the Mystic side of Woo Foo, but she is also skilled in Martial Arts. Yin is often described as intelligent, cute, girly, and sassy, but she is often quite stubborn and shows signs of being a "neat freak". Yin generally has a good sense of right and wrong, and will often do the right thing.
[[hardline]]

* ActionGirl
* AllGirlsLikePonies: Or Twonicorns, as the case may be.
* AllGirlsWantBadBoys: She's only hot for Coop when he's evil. [[spoiler: She reveals this was a phase and snaps out of it. She hooks up with Coop once he channels his powers for good.]]
* AttentionWhore: Incredibly during "Yin-Credible" where she takes credit for Yang's witty insults just to hog up the spotlight. This ultimately ends up biting her in the butt later.
* BadassAdorable
* BadassBookworm
* BalloonBelly: Briefly in "How The Cookie Crumbles"
* BarrierWarrior: Due to a number of DeflectorShields, she's able create force fields as shield or use them as their own weapons.
* BrainsAndBrawn: The Brains to Yang's Brawn.
* BrotherSisterTeam: With Yang.
* ButtMonkey: Not as bad as Yang, but she still suffers for the sake of comedy quit a bit.
* CallingYourAttacks
* ColorCodedWizardry: The color of her magic tends to change depending on the spell. It is normally a bright shade of blue while her fire based attacks are a fitting red. When activating her aura, it's always pink.
* CuteBookworm
* CuteBruiser
* DeadpanSnarker
* EvilMakeover: During "Gown a Fowl", Yin's appearance becomes more and more dark as Coop's evil nature starts to cling onto her, starting off with simply dark clothes and make up until her fur and aura entirely change.
* ExcessiveEvilEyeshadow.: Takes up a sudden fondness for dark and heavy eye make up when Coop's evil corrupts her, as well as the rest of her clothing until the markings give her something similar to the Nightmaster.
* FoolishSiblingResponsibleSibling: Responsible to Yang's Foolish.
* GirlyBruiser
* GranolaGirl
* HalfIdenticalTwins: With Yang.
* HeinzHybrid: [[spoiler: Master Yo is her father, making her and Yang half-panda.]]
* HypocriticalHeartwarming: She says that she's the only one who gets to laugh at Yang.
* InterSpeciesRomance: With Coop (a chicken) and Clamuel (a clam) among others.
* KungFuWizard: Regularly combines her magic skills with fighting, being able to mesh her strength and speed with spells during battles.
* LevitatingLotusPosition
* LittleMissBadass
* [[MySisterIsOffLimits My Brother Is Off Limits]]: She isn't very supportive about Lina's relationship with Yang, though her reasoning equates to wanting to spend more time with her friend rather than Lina with Yang.
* NeatFreak: Has been used against her before.
* OfficialCouple: With Coop.
* PinkMeansFeminine
* PintSizedPowerhouse
* PlayingWithFire: "Yincinerate!"
* PolarOppositeTwins: With Yang.
* PositiveDiscrimination
* RedOniBlueOni: Blue to Yang's red.
* [[RoseHairedSweetie Rose Furred Sweeite]]: Though the "sweetie" part can sometimes be debatable, Yin is a rather nice girl with good intentions if her selfishness doesn't get in the way.
* SwordAndSorcerer: The Sorcerer to Yang's Sword.
* TakingTheBullet: [[spoiler: Jumps in front of the Woo Foo Aura Drain Eradictus originally aims at Yang, ultimately letting herself slowly die in his place.]]
* WhiteBunny: [[{{Pun}} Colorfully]] [[AvertedTrope averted]].
[[/folder]]

[[folder:Master Yo]]
'''Master Yo'''
->Voiced by: Martin Roach

Teacher of Yin and Yang. Yo is a grumpy old panda whose age is unknown (but he missed his 117th high school reunion). Yo has great sage wisdom and is a master in the Woo Foo arts. Master Yo mentors Yin and Yang in the Woo Foo way to save the world, but it wasn't his choice. The spirits of past Woo Foo warriors stopped him from watching a movie called Who Stole the Cookie until he decided to do it. He's able to use both might and magic and has moves that Yin and Yang have no clue about.
[[hardline]]

* [[spoiler: ActionDad]]
* AfroAsskicker: Back in his younger days, he dawned skills as broad as his afro.
* BadassGrandpa
* BrilliantButLazy: He's a master of Woo Foo, but is now perfectly content to lounge around and do nothing.
* DeadpanSnarker
* DirtyOldMan: Attends a macrame gathering with Yin just so he can meet up with single women that are most likely way younger than he is.
* FunnyAfro: Sported one back when he was younger though it's entirely withered away as he's aged.
* GrumpyOldMan
* HeroOfAnotherStory: Is currently trading out his past success to be a mentor though he isn't too shabby on his past skills and still contains a lot of his knowledge.
* IAmBigBoned
* JerkWithAHeartOfGold: A lazy, gluttonous, and rude old man but he does care a lot about Yin and Yang and is willing to do what he can to protect them.
* LastOfHisKind: He's the last panda on earth.
* LukeIAmYourFather: [[spoiler:He's Yin and Yang's missing dad.]]
* PapaWolf: Though he regularly lets Yin and Yang handle their own battles, he's more than willing to stand up for and rush to their aid if he sees they're in need of help. He especially applies to this after the reveal that [[spoiler: he's they're biological father.]]
* ParentalSubstitute: Has practically raised too children due to their absence of their actual parents. Though it later turns out that [[spoiler: he was their father all along and had his memory wiped of them ever being born.]]
* InterSpeciesRomance: [[spoiler:In relation to the previous trope, Yo should had a rabbit girlfriend/wife.]]
* TheObiWan: Despite he's still alive, his spirit appears to advice Yin and Yang when he's not present.
* OldMaster: A spoofed example.
* PandaingToTheAudience
* PurpleEyes
* TricksterMentor
* TrademarkFavoriteFood: Pretzels.
[[/folder]]

!'''''Allies'''''

[[folder:Lina]]
'''Lina'''
->Voiced by: Novie Edwards

An aqua-green female dog, Lina is Yang's girlfriend (after "Gone-A-Fowl") and Yin's best friend. She is a nice, yet short-tempered girl who lives on a farm with her father. She was first introduced in "Beetlemania", when Yang pretended to be a Woo Foo Warrior in order to impress her, but his plan backfired after he had to fight a giant steel beetle; eventually, Yin was able to get Yang to tell the truth. Lina is often unafraid to state her opinion and even talks back to her father. She was trained by Yin and Yang to use Woo Foo and is the second-in-command of the Woo Foo army Yin and Yang gathered together.
[[hardline]]

* ActionGirl: After being trained to use Woo Foo might.
* BlushSticker
* CatchPhrase: "Talk to the hand!"
* DeadpanSnarker
* FurryFemaleMane: Has short magenta hair.
* InterspeciesRomance: With Yang. She's a dog.
* TheNoseless
* PurpleEyes
* OfficialCouple: With Yang.
* SassyBlackWoman: Sure, she's blue but she certainly has the voice and personality of one.
* SpellMyNameWithAnS: Some people called her Lena.
* TookALevelInBadass
* {{Tsundere}}: Lampshaded by Lina herself in "Gone-A-Fowl".
* ViolentlyProtectiveGirlfriend: Defending Yang from Evil Yin in "Gone-A-Fowl".
* VocalEvolution: For a short moment, she has a very high voice in "The Truth Hurts" and then goes back to a deeper voice.
* YouGottaHaveBlueHair: You Gotta Have Aquamarine/Turquoise Fur
* ZettaiRyouiki: A Grade B at most.
[[/folder]]

[[folder:Roger Jr.]]
'''Roger Jr.'''
->Voiced by: Damon Papadopoulos

Logically the son of Yin and Yang's part-time enemy, Roger the Skelewog. At first, Roger Jr. was a bully to Yin and Yang, having mock fights with Yang and teasing him and Yin, but, during "Woofoogeddon", it was revealed he longed to be Yang's best friend. Roger Jr., being a monster, has displayed super strength, such as when he easily took out a whole group of the Night Master's soldiers just by running by them with his arms. He is also a member of the Woo Foo army Yin and Yang gathered together.
[[hardline]]

* BreathWeapon
* FriendlyEnemy
* JerkassFacade: He pretends to hate Yang, but he longs to be his friend.
* NiceHat: His baseball cap.
* SuperStrength
* VitriolicBestBuds: With Yang.
[[/folder]]

[[folder:Dave]]
'''Dave'''
->Voiced by: Dwayne Hill

A magical talking tree stump, Dave is a low-life and is considered pathetic by his friends. Many times, Dave is often caught in the crossfire of battles or hurt in some way by friend and/or foe. He is also whiny, talks nonstop about his family of trees, and is never noticed. As discovered in Stuck, Dave has the ability to communicate with and manipulate non sentient plants. This apparently surpasses that of the other characters. He is now a member of Yin and Yang's Woo Foo army.
[[hardline]]

* ButtMonkey: Is constantly deemed annoying and whiny by anyone who meets him, including his group of friends.
* TheChewToy: Which is saying something given how much slapstick other's suffer.
* GreenThumb: Can communicate and manipulate other plants which ends up making him quite powerful.
* NiceHat: His baseball cap.
* PlantPerson: Literally a talking tree stump.
* PurpleEyes
* TookALevelInBadass: Learns about his abilities during "Stuck" and from then on has been able to use to help out.
* YouthfulFreckles

[[/folder]]

[[folder:Coop]]
'''Coop'''
->Voiced by: Dwayne Hill

A nerdy chicken who appears to be scared of any threats and has a huge crush on Yin but because she never returned any of his feelings, Coop joined the Night Master in exchange for the promise to have Yin when the world was taken over. He is a minor villain and he is seen with some of the other villains in the Yin, Yang, Yo intro in season 1. Coop gave the impression of incompetence, but in reality, he had powers and abilities rivaling Yin and Yang's; in the end, Coop couldn't bring himself to go through with the Night Master's plans and held him in place so Yin and Yang could destroy him. Eventually, he returns and ends up overwhelmed by the power of the Night Master, temporarily becoming evil before snapping to normal and going off to train and gain control. Upon doing so, he joins the Woo Foo army.
[[hardline]]

* AbhorrentAdmirer: Towards Yin due to his obsessive behavior and general nature that Yin finds more annoying than endearing, no matter how hard the poor guy tries to impress her.
* AllLoveIsUnrequited: His feelings towards Yin seem like they'll never be returned [[spoiler: that is until the ending of the series when Yin seems to return his feelings.]]
* InterSpeciesRomance: A chicken who has, occasionally, gotten romantically involved with a rabbit.
* NerdGlasses
* OfficialCouple: [[spoiler: Later gets the relationship he's been yearning for with Yin.]]
* PunnyName: A chicken named Coop, as in a chicken coop.
* SingleTargetSexuality: Only shows to have eyes for Yin the entire series...unless you count his strange fondness for corn.
* StalkerWithACrush: To Yin.
* SuperPoweredEvilSide: Due to the Nightmaster's presence infesting him, he can become a super powered and muscular version of himself that comes along whenever he grows agitated.
* VerbalTic: "Buckaw!"
[[/folder]]

[[folder:Muffin, The Town President]]
'''Muffin, The Town President'''

[[BlatantLies Description coming soon.]]
[[hardline]]

* ILied: In one episode when he promised Yin and Yang that he'd get them into a hip club.
* MayorPain
[[/folder]]

[[folder:Jobeaux]]
'''Jobeaux'''
->Voiced by: Creator/BillEngvall

A Redneckistanian practicing Woo Foo, while being disliked by his teachers, Yin and Yang, as a stupid, smelly hick; however, when he finally gets the time to clean himself up, he reveals himself to be a smart, well-groomed young man. After defeating the Chung Pow Kitties, Jobeaux reveals his knowledge of Yin and Yang's disrespect and returns home to marry and live in a castle of diamond-encrusted grits (which Yin was fantasizing about before they met). He has a pet armadillo named Fuzzy Thunder that hides in his mouth, giving him a hick accent.
[[hardline]]

* DeepSouth: He lives in Redneckistan
* ModestRoyalty: Somewhat. Despite being a prince, he's rather casual and doesn't show much interest in changing his traditional ways even when he does take up a married life in a diamond encrusted grit fortress.
* RoyalsWhoActuallyDoSomething: Takes a very active role in his kingdom and seems to be the most active method of defense.
* WarriorPrince: Yes, it's hard to believe, but he's a prince.
[[/folder]]

[[folder:The Boogeyman]]
'''The Boogeyman'''

The Boogie Man is a disco-loving green monster that helps Yin and Yang defeat Pondscüm, Zarnot, Fastidious and Mastermind in "Roboticus Maximus". When the two rabbits were looking for a sidekick to boss around, they chose him. Eventually, they put him in charge over them which lead them to a victory. He became part of the Woo-Foo army they gathered.
[[hardline]]

* AfroAssKicker
* CoolShades
* EverythingsFunkierWithDisco
* FunnyAfro
* TheUnintelligible: "This boogety-bites the big bamma-lamma!", among others. Actually protects him against mind-reading as while someone could read his mind, they still can't understand disco.
[[/folder]]

!'''''Villains'''''

[[folder:The Night Master]]
'''The Night Master'''
->Voiced by: David Hemblen

Billed as a "Dark Overlord in an Evil Class All By Himself", the Night Master is a very powerful and dangerous foe who was responsible for the near extinction of Woo Foo by eliminating all of the Woo Foo knights except for Master Yo. The Sensei managed to turn Night Master's army to stone and sent him into hiding for a hundred years until he tricked Yin and Yang into using Woo Foo in order to free his army. The Night Master appears to be a demonic sorcerer bat (as such, he hates light) of some description and has a liking for Gothic, ostentatious outfits.
[[hardline]]

* AsLongAsThereIsEvil: It's possible for about anyone to take up the Nightmaster's reign as long as they prove how terrible of a person they are. So even if the current one dies, there can always be a replacement.
* BatOutOfHell: Resembles an incredibly tall and thin bat wearing a cloak.
* BigBad: Season 1
* TheComicallySerious: It's his short temper and serious nature towards most things that make his interactions with more zany characters all the more comical.
* DarkIsEdgy: Easily one of the more deliberately dark villains of the series with little added to his character to make him seem more silly and pitiful.
* DarkIsEvil
* EvilLaugh
* EvilSorcerer
* EvilOverlord
* {{Expy}}: Aku of SamuraiJack
* TheHeavy: The one who started the main source of conflict with Woo Foo being close to nonexistent int the current society and not at all taken seriously by others.
* KnightOfCerebus: Despite some occasionally funny scenes regarding his fashion choices, he's clearly the main cause behind a mass genocide and he's taken in all seriousness whenever he invests in his plans
* LeanAndMean
* NamesToRunAwayFromReallyFast
* ObviouslyEvil: He's a giant bat who wears a dark cloak and speaks in an eerie voice; also, he prefers looming in the shadows at all times.
* RedAndBlackAndEvilAllOver: The marks around his eyes are red and his cloak is black with red underneath.
* RedEyesTakeWarning: Sometimes they are most noticeable when he's in the dark.
* SurroundedByIdiots: He's pretty smart himself, it's just that his minions tend to be much less intelligent than him and screw up his plans.
* TheTrickster: Enough to get Yin and Yang to accidentally free him.
* WeakenedByTheLight: His main weakness is sunlight which is why he always looms in the darkness to avoid being burned to death.
* VileVillainSaccharineShow: A genocidal, power hungry destroyer who now wants to kill two children and their elderly panda mentor and maybe take over the world in the process.
[[/folder]]

[[folder:Carl, the Evil Cockroach Wizard]]
'''Carl, the Evil Cockroach Wizard'''
->Voiced by: Jamie Watson

Carl, the Evil Cockroach Wizard (who tends to shout out his name as much as possible and always wants to be called Carl [[SpellMyNameWithAThe the]] Evil Cockroach Wizard), continuously schemes to defeat Yin, Yang, Master Yo and the power of the Woo Foo with his insecure genius. He also lives with his overbearing mother Edna, who is a dragon (it makes no sense as to how they are all related). Carl is always trying to find a way to impress his mother and out-do his brother Herman. Despite his desire to win his mother's love, Carl is resentful and has talked back (usually under his breath), made her cry, and even put a spell on her.
[[hardline]]

* AffablyEvil
* AmbiguouslyGay
* BreakingTheFourthWall
* ButtMonkey
* CardCarryingVillain
* DeadpanSnarker: Easily one of the more sarcastic characters.
* DisappearedDad
* EnemyMine: One of the only villains to team up with Yin and Yang. [[spoiler: He even considered a HeelFaceTurn in one episode but was rejected]].
* EvilIsPetty: This is how Yin and Yang get him and Herman to end their truce in ''Family Day''.
--> '''Yin:''' We need to get them fighting again... but how?
--> '''Yang:''' What's that emotion I have that always makes me wanna dump on your day?
--> '''Yin:''' Oh, oh! [[LampshadeHanging Petty jealousy]]?
* EvilSorcerer
* GreenEyes: Possibly indicative of his [[GreenEyedMonster jealousy]] of his brother and/or to invoke EmeraldPower.
* LetsGetDangerous / NotSoHarmlessVillain: He's powerful enough to [[spoiler: take out the Night Master's EliteMooks in droves during the season one finale]]. He is also the member of the RoguesGallery that has the most episodes centered around him.
** Lampshahded a few times. Yang points out that while he is dangerous, their insults make him mad and throws him off.
** Another example is where Carl switches minds with Yo. Yo uses Carl's powers to fight back against brother Herman, revealing Carl is as strong as his brother.
* PaperThinDisguise: How Yin and Yang ''never'' seem to see through them is a mystery, as almost ''all'' his plans include the use of a disguise at some point, often more than once an episode, occasionally involving [[DisguisedInDrag crossdressing]], and at least once it wasn't even necessary.
--> '''Herman:''' Exactly ''why'' do we have to [[SuperMarioBros dress like plumbers]] to sneak into a bathroom window?
--> '''Carl:''' You know me, I like to play dress-up.
* SiblingYinYang: With Herman.
* SupernaturalIsPurple: His cape is purple.
* SwordAndSorcerer: When cooperating with Herman, with him as Sorcerer.
* TheUnfavorite
* WeaksauceWeakness: Getting him angry causes him to lose focus; unfortunately for him, it is very easy to get him angry.
* WoobieDestroyerOfWorlds: It is implied on numerous occasions that his failed attempts at being a villain efficient and physical abuse of his older brother, is resentment that motivates him to try to defeat Yin and Yang to impress his mother.
[[/folder]]

[[folder:Eradicus]]
'''Eradicus'''
->Voiced by: Jonathan Wilson

A mighty Gryphon who is bent on destroying Woo Foo. As revealed in "Welcome To The Dark Tomorrow", he is in fact the first and original Night Master. After his demise (of unknown cause), other beings of darkness took on the mantle of evil he left behind including an unknown snake lady and the bat-creature Yin and Yang faced in season 1. His deceased minions posed as the ghosts of the Woo Foo Elders to manipulate Yang into collecting the items of power needed to revive him. Tricking Yang into throwing the items into the Night Master's fireplace at the stroke of midnight, Eradicus was instantly resurrected.

* AttackOfTheFiftyFootWhatever: He's miles taller than about any other person presented, only seeming smaller than the Halloweenie he summons and can stand atop of.
* BigBad: Season 2
* CardCarryingVillain
* CorruptCorporateExecutive: As the head of "Eradicorp"
* [[EarlyBirdCameo Early Griffon Cameo]]: First seen in "Doomed To Repeat It"
* EvilOverlord
* NamesToRunAwayFromReallyFast: His name could easily be interpreted as "eradicate", which means to destroy completely. He especially lives up to his name after he successfully brings on the Dark Tomorrow which is the show's equivalent to the apocalypse.
* LargeAndInCharge
* LargeHam: Lots of it.
* OurGryphonsAreDifferent
* PowerEchoes: Almost always has the presence of two voice speaking at one time, though it's especially noticeable whenever he shouts.
* SuddenlyShouting: To add onto his hamminess, he has a bizarre habit of starting off his sentences in a flat and calm tone until randomly shouting at the top of his lungs by the end.
* VillainsOutShopping: Aside from being evil, he loves polka and to throw slumber parties with his minions
[[/folder]]

[[folder:Ella Mental]]
'''Ella Mental'''
->Voiced by: Linda Ballantyne

A female villain who can read minds. She is the smartest one of Eradicus's minions, though her blunt corrections often get her zapped by Eradicus. Eradicus also forced her into tuba lessons, and can play polka music.
[[hardline]]

* DarkActionGirl
* TheDarkChick
* DeadpanSnarker: Normally in response to the other's incompetence.
* EvilGenius: The smartest out of the group and is far more likely to plan ahead and approach situations with common sense before jumping head of herself.
* FieryRedhead: Mostly averted as she's easily the most level headed member of the team, but does have a tendency to become incredibly malicious and loud if angered.
* {{Flight}}: Is one of few characters shown to have this ability.
* MagicStaff: Regularly holds a long staff with a glowing red orb at the top.
* MiniDressOfPower
* PsychicPowers: Is able to mind read and levitate items and harbors a great deal of power from being within her own mind as shown in Mind Games when she nearly overpowers Yin.
* PowerpuffGirlHands
* ProudBeauty: Holds a lot of satisfaction in her attractiveness and doesn't take it well when Yin thinks she's not that hot.
* PunnyName: Sounds like Elemental
* QuirkyMinibossSquad
[[/folder]]

[[folder:Indestructo-Bob]]
'''Indestructo-Bob'''
->Voiced by: Tony Daniels

A villain who has nearly impenetrable armor and can bowl over nearly anyone. He can be best described as unintelligent.
[[hardline]]

* TheBrute
* DumbMuscle: Emphasis on ''dumb''.
* NighInvulnerability: Hence his name
* PunnyName
* QuirkyMinibossSquad
* ThirdPersonPerson: He refers to himself as "Bob"
[[/folder]]

[[folder:Rubber Chucky]]
'''Rubber Chucky'''
->Voiced by: Peter Crugo

A villain who can stretch himself into any shape and any person. He loves cracking bad jokes. His name is a portmanteau of the gag toys Rubber Chicken and Rubber Ducky.

* NiceHat
* PungeonMaster
* PunnyName
* QuirkyMinibossSquad
* VoluntaryShapeshifter
[[/folder]]

[[folder:Molecu-Lars]]
'''Molecu-Lars'''
->Voiced by: David Berni

A villain who can shapeshift and regenerate his limbs.
[[hardline]]

* TheAhnold
* BrotherChuck: Introduced physically in "Welcome to the Dark Tomorrow" but never seen again.
* PunnyName
* QuirkyMinibossSquad
* VoluntaryShapeshifter
[[/folder]]

[[folder:Brother Herman]]
'''Brother Herman'''
->Voiced by: David Berni

Carl's black-hearted, sadistic, selfish and evil ant brother, Herman, is a tyrannical ant warrior who rules his kingdom with an iron fist, a diabolical mind, and impeccable table manners. He is also quite the mama's boy. He attempted to take over the world until Master Yo stopped him.
[[hardline]]

* AloofBigBrother: To Carl. Though it's never outright stated that he is the elder of the two, it's implied here and there, and he certainly fits the trope.
** BigBrotherBully
* DisappearedDad
* DropTheHammer: When he's not wielding a sword or [[GoodOldFisticuffs his fists]], he uses a warhammer.
* EvilOverlord
* EvilerThanThou: To Carl.
* AFatherToHisMen: Subverted. "Please, soldier, don't cry... because ''weakness is a punishable offense!'' THROW HIM IN THE DUNGEON!!!"
** Although, in the same episode as the above quote, the motivation behind his plan is to protect his subjects from [[SolarPoweredMagnifyingGlass Solar Powered Magnifying Glasses]].
* FauxAffablyEvil
* GrayEyes
* MommasBoy: A trait he and his brother share.
* MultiArmedAndDangerous: He has four arms, making him capable of ''[[DualWielding Quadruple]]'' [[UpToEleven Wielding]].
* MultiMeleeMaster: Swords and hammers.
* NighInvulnerability
* OhCrap: When he finds out that the potion to take away his allergies no longer works [[spoiler: because all the potion did was conjure up a clothespin over his nose, and Yin flicked it away easily]].
* SatelliteCharacter: While Carl appears plenty of times without him, it's noteworthy that he ''never'' appears in an episode without Carl making at least a cameo, if not sharing the spotlight. His character is largely defined by comparison with his brother. It's particularly jarring since he's mentioned as having conquered most of the world, and is played up as being a more competent villain overall.
* SiblingYinYang: With Carl.
* SuperStrength
** StrongAnts
* SwordAndSorcerer: The Sword (or Hammer, or Fists) when paired with Carl.
* WeaksauceWeakness: He's allergic to panda fur. [[spoilers:Both physically and mentally allergic to it.]]
[[/folder]]

[[folder:Ultimoose]]
'''Ultimoose'''
->Voiced by: Tony Daniels

Ultimoose is the ultimate Night Master lackey: tough as nails, a master at Moose fighting, and really, really dumb, despite his shortness and strong antlers. He seems to offer work under the Night Master but is merely a dim-witted pawn.
[[hardline]]

* BattleCry: "HOOH!HAAH!HOOH!"
* BoisterousBruiser
* ButtMonkey
* [[spoiler: FromNobodyToNightmare: In Deja Foo after becoming the Night Master, (calling himself the Night Mooster) and killing Yin and Yo and nearly killing Yang as well.]]
* HarmlessVillain: He's treated as one, but can be quite dangerous.
* LargeHam: a lot
* MooseAreIdiots
* RedEyesTakeWarning
* StrawMisogynist
* ThirdPersonPerson
[[/folder]]

[[folder:Yuck]]
'''Yuck'''
->Voiced by: Scott [=McCord=]

Yuck, a turquoise-green rabbit with terrible hygiene, is an entity formed from Yin's obsession with control and Yang's aggression. As a disgusting, mutant rabbit, Yuck wants more than anything in the world to be the greatest, most powerful Woo Foo Knight of all time.
[[hardline]]

* AllYourPowersCombined: He has all of Yin and Yang's abilities
* [[ArrogantKungFuGuy Arrogant Woo Foo Guy]]
* AxCrazy: Aggressive as he is, Yuck seems to derive sadistic fun from generally hurting people and many of his deranged smiles imply he isn't entirely right in the head.
* {{Badass}}: Despite his arrogance and cruelty, he does prove to be one of the most formidable foes in the series, able to outsmart and near victory a number of times by himself. Not to mention that he's possibly the most power Woo Foo knight in existence, nearly killing Master Yo the first time in a mostly one sided fight.
* BigEater: Eats an entire pie and a pizza in his debut episode in just a few bites, normally making a mess along the way.
* BloodKnight: Having Yang's aggression, this is a given.
* BlowYouAway: "Yuck-i-cane!"
* CallingYourAttacks: Sometimes
* ControlFreak: Obtains an obsessively controlling personality on behalf of Yin.
* EnergyBall: Is able to devise a ginormous sphere of green energy on one finger strong enough implode an entire town.
* EvilCounterpart: To both Yin and Yang.
* FangsAreEvil
* GoodCostumeSwitch: In "Upstanding Yuck" he wears a non ripped shirt, seems to have bathed himself, and slicks back his fur.
* HeelFaceRevolvingDoor: Also in "Upstanding Yuck" he becomes a good guy by having a group of hooded figures beat goodness into him. Yin and Yang don't trust him of course and follow him around, ambushing him whenever his words sound like a threat. They're proven wrong in the end, realizing too late that Yuck was good all along and that their actions have only turned him back to his old ways.
* {{Hermaphrodite}}: Though he is addressed using male pronouns, "Yin Yang Yuck!" shows him coming out of a bathroom labeled with a question mark. Then "Personality Problem" reveals that he actually does have a male and female aspect of his personality.
* HiccupHijinks: The main thing that defeats him at the end of "Imperfect Fooplicates". Despite his incredibly increased power after inhaling a number of Fooplicate flakes, this also gave him a bad case of hiccups that make him lose control of his abilities and ultimately beat himself up.
* {{Jerkass}}
* KillerRabbit: An almost literal version.
* LargeHam: Not quite as much as other examples as he seems to be able to keep his speaking patterns more casual, but he can certainly bring up the ham [[IncomingHam whenever he makes an entrance.]]
---> Yeah baby, I'm back!
* MagicKnight
* ManipulativeBastard: Has proved himself capable of plotting multiple people to his schemes.
* MasterOfDisguise: Unlike other villains, he wears some pretty convincing disguises to the point his reveal can be the biggest shocker, normally involving robot suits or someone else's body he'll posses.
* NeverMyFault: Rarely ever takes the blame for his failures, especially in "Personality Problem" where he blames Yin and Yang for being on top of their game for him being defeated and towards the end of the episode where he claims his girl half's idea is the reason he lost.
* ThePigPen
* PintSizedPowerhouse
* PlayingWithFire: Is capable of doing the Fists of Fire when he's first made, just to prove how powerful he already was.
* SicklyGreenGlow: His magic is this color.
* SlasherSmile
* SmugSuper: Always feels the need to point out how he's a Level 5 Woo Foo Warrior and he's still hungry for more power.
* ThirdPersonPerson: On occasion, he'll end a threat with his own name, such as shouting phrases like "So swears Yuck!" or "You'll be no match for Yuck!".
* VocalEvolution: His voice starts off as more nasally in the first season and sounds more raspy in "Voyage to The Center of Yo". In the second season, he has his official voice which is deeper and slightly raspy.
[[/folder]]

[[folder:Smoke]]
'''Smoke'''
->Voiced by: Linda Ballantyne

A hyper-active female who was, supposedly, Yang's girlfriend. It turns out she was using him to fight against her brother, who in turn, captures Yin to fight against Smoke. Yin and Yang eventually capture the two into Smoke's Prison Prism.
[[hardline]]

* AffectionateParody: Smoke and Mirrors capture Yin and Yang and force them to fight in a style similar to Pokemon while the characters themselves are one of anime. Smoke dating Yang is a parody of Pokemon's usual PowerOfFriendship theme. She is dressed in SailorFuku and wields a large Buster Sword-like blade.
** Smoke loses the Pokemon angle in later appearances, becoming an entirely different parody that's only more ironic considering her VA (see below).
* AmazingTechnicolorPopulation: Yellow skin.
* AmbiguouslyHuman: Resembles a human more than anyone else, only excluding her yellow skin and lack of a nose, though she's never specifically stated to be one.
* AxCrazy: A number of the things she randomly yells between her lectures range from bizarre to downright terrifying threats towards people who may be annoying her.
* {{BFS}}
* BoobsOfSteel
* CuteLittleFangs: Has two sharp teeth that come out of her mouth.
* DarkActionGirl
* DatingCatwoman: Yang dated her.
* EvilRedhead
* FieryRedhead: Can't go very long without screaming a threat, normally finishing with a giggle.
* ImpossibleHourglassFigure
* LargeHam
* MagicSkirt: Despite doing a great deal of fighting, her skirt stays in place as though it were cloaked in starch.
* NoblewomansLaugh: A subtle case as her laughs aren't much beyond a giggle though she always holds her hand up to her mouth whenever doing so.
* TheNoseless
* PunnyName
* RapunzelHair: That is one HUGE ponytail.
* RedEyesTakeWarning
* SailorFuku: Going along with an embodiment of anime parodies.
* ThighHighBoots
* VerbalTic: Normally finishes her statements with a "tee hee!"
[[/folder]]

[[folder:Mirrors]]
'''Mirrors'''
->Voiced by: Jonathan Wilson

Smoke's rivaled brother. When Smoke uses Yang in the tournament, Mirrors obtains Yin to fight her. Yin and Yang managed to use one of the Forever Friend Prisms to imprison Smoke and Mirrors. Mirrors' hairstyle resembles the hairstyle of Goku from Dragon Ball Z. He appears to speak in a way mocking most anime, by stopping and starting at odd intervals.
[[hardline]]

* AffectionateParody: Smoke and Mirrors capture Yin and Yang and force them to fight in a style similar to Pokemon while the characters themselves are one of anime. Mirrors mimics Tuxedo Mask while having a vague resemblance to [[DragonBallZ Goku]].
* AmazingTechnicolorPopulation: Green skin.
* AmbiguouslyHuman: Bares a humanized appearance much like his sister's though it's never clarified what he actually is.
* AnimeHair
* CuteLittleFangs: A lot like Smoke's.
* [[IKnowKarate I Know Kung Fu]]: As he very well points out with a series of poses before disappearing in his introduction.
* PunnyName
* SomethingAboutARose: Flings one into the ground before his introduction, copying [[Anime/SailorMoon a particular anime.]]
* WalkingShirtlessScene
[[/folder]]

[[folder:Saranoia]]
'''Saranoia'''
->Voiced by: Linda Ballantyne

With an outfit & magic wand for every occasion, Saranoia is a powerful sorceress and mistress of disguise. Deeply sexist and obsessed with female rights, she is determined to free Yin from studying Woo Foo and take in as her disciple. She had a terrible childhood and always thinks men are like her lazy brother Mark and her boy-favoring wizard father, who she mistakes Yo as, just as she mistakes Yang for Mark.
[[hardline]]

* AmazingTechnicolorPopulation: Light purple skin.
* BeautyMark: Under her left eye.
* [[EvilSorcerer Evil Sorceress]]
* {{Flanderization}}
* GreenEyes
* HotWitch
* ImpossibleHourglassFigure
* MagicWand
* {{Squick}}: InUniverse, her obsession with Yin.
** [[LesYay "Sweat Sisters."]]
* StrawFeminist
* TheUnfavorite
* [[YouGottaHaveBlueHair You Gotta Have Purple Hair]]
[[/folder]]

[[folder:Zarnot]]
'''Zarnot'''
->Voiced by: Jamie Watson

Once Yang's favorite toy, Zarnot is an evil action figure brought to life by the Lie Fairy, hell bent on destroying Yang.

* CardCarryingVillain: He ''wants'' to be one.
* LargeHam
* HumongousMecha: Subverted for most of the time, but sometimes displays the ability to grow huge
[[/folder]]

[[folder:Pondscum]]
'''Pondscüm'''
->Voiced by: Jonathan Wilson

A street, Swedish, fish inside a robot suit. His being a "Swedish fish" appears to be a reference to Swedish Fish candy. He is obsessed with "bling-bling", and will get it at all costs; however, he truly carries a Swedish accent.
[[hardline]]

* FunnyForeigner
* EverythingsFunkierWithDisco
* GoldMakesEverythingShiny
* InsistentTerminology: Insists that people pronounce the U with the umlaut in his name properly.
* NegativeContinuity: it was revealed to be a frog in "Deja Foo", but in "Welcome to the Dark Tomorrow" was a fish again.
* {{Sidekick}}: the Blixens
[[/folder]]

[[folder:Chung Pow Kitties]]
'''Chung Pow Kitties'''

Are little, furry and adorable kittens (at first glance), but they are really evil and heartless ninjas. They usually wear dresses red, blue and green.
[[hardline]]

* BadassAdorable
* CatsAreMean
* {{Evil Diva}}s
* PintSizedPowerhouse
* TerribleTrio
* TheUnintelligible: They only say "meow" yet they manage to be an incredibly popular band.
* [[VillainWithGoodPublicity Villains With Good Publicity]]: Due to being a popular band, they're easily able to deceive people and get away with their schemes.
[[/folder]]

[[folder:Kraggler]]
'''Kraggler'''
->Voiced by: Tony Daniels

A gargoyle who is about a "bazillion" years old, Kraggler used to be a great and powerful warrior and Master Yo's arch enemy. Reduced to a feeble old man, after he broke the time traveling hour glass he got the power to drain the youth from anything, or give his age to anything.
[[hardline]]

* GrumpyOldMan: He's default form if he isn't much younger.
* OurGargoylesRock
* PlotRelevantAgeUp: Does this to Yin and Yang which later turns into RapidAging for the duo.
* TotallyRadical: Whenever he's in the form of his younger self.
* TimeMaster: The hourglass he had can influence time travel and grants him the ability to influence one's age.
[[/folder]]

[[folder:Mastermind]]
'''Mastermind'''
->Voiced by: Peter Crugo

An evil mittens-wearing wizard who was a big threat years ago; now he's just a brain looking for a body to regain his reign of evil.
[[hardline]]

* DiabolicalMastermind
* TheDitz: "I was the ruler of an empire that covered over twelve continents in a world that only had seven!"
[[/folder]]

[[folder:The Manotaur]]
'''The Manotaur'''
->Voiced by: SethMacFarlane

A half-man with hairy hooves, but all man (that is if one would count collecting comic books and action figures manly). He is a large man with a bald head who dresses like a city man.
[[hardline]]

* AmbiguouslyGay: His fashion sense.
* BaldOfEvil
* EvilLawyer
* FourFingeredHands: Unlike the rest of the cast, he subverts it.
* LargeHam
[[/folder]]

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