Characters / Yin Yang Yo!

Characters of the Yin Yang Yo! cartoon

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Main Characters

    Yang 
http://static.tvtropes.org/pmwiki/pub/images/yang.jpg
Voiced by: Scott McCord

A blue, male rabbit and the twin brother of Yin. He mostly uses the Might 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.
  • Attention Deficit... Ooh, Shiny!: 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.
  • Badass Adorable: A cute blue rabbit who is a Woo Foo practitioner.
  • BattleCry: "Chee, Hoo, Waa!"
  • Blood Knight: Loves kicking butt.
  • Blow You Away: "Foonado!"
  • Blue Is Heroic: A blue rabbit and one of the main heroes.
  • Book Dumb: He's intelligent in his own way.
  • Brains and Brawn: The Brawn to Yin's Brains.
  • Brilliant, but Lazy: In "Doomed to Repeat It", he says that he does learn stuff, but he doesn't want Master Yo to know that, so that he could get away with more; in fact, if he is willing to think, he is able to escape traps/situations more often (unless he wanted to be trapped/captured just so he could fight some more).
  • Brother-Sister Team: With Yin.
  • Bruiser with a Soft Center: "Touchy Feelings" reveals he's this. When his emotions are blasted out of him (takin the shape of small color bunnies of energy half his height), Yin tries to find the Love bunny, since Yang loves to kick butt. While searching for it, the Love bunny approaches behind Ying and Fre-ped. It's practically a Kaiju in terms of size, being almostt twice as tall as the buildings of the city. Yin and the villain lampshade this revelation on much Yang really cares:
    Fre-Ped: Wow, he sure bottles up that thing deep inside there, doesn't he?
    Yin: It's a boy thing.
  • Butt Monkey
  • Calling Your Attacks
  • Catch Phrase: Several.
  • Chick Magnet: Has gotten the attention of Lina, Melodia, Princess of the Stink Aardvarks and even the dangerous Smoke.
  • Crouching Moron, Hidden Badass: 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.
  • Cute Bruiser
  • Deadpan Snarker
  • Dumb and Drummer: In "The Gig is Up", he's the drummer of the band.
  • Dumb Muscle: Tends to rely too much on violence to settle his problems even if he does have his moments of clarity.
  • Excuse Me While I Multitask: 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.
  • Foolish Sibling, Responsible Sibling: Foolish to Yin's Responsible.
  • Half-Identical Twins: With Yin.
  • Heinz Hybrid: Master Yo is his father, making him and Yin half-panda.
  • Hidden Depths:
    • He is actually more intelligent than he appears to be and when he puts his mind to it, can be very studious and learn techniques quickly.
    • In an episode revolving around mind-reading, we learn he loves writing poetry (usually about Lina) as well as fantasing about painting her toenails.
  • Hot-Blooded
  • I Shall Taunt You: Especially during "Yin-Credible", it's shown that he tends to get the upper hand on foes by teasing them throughout.
  • Inter Species Romance: With Lina who turns out to be a dog.
  • It's All About Me: 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.
  • Jerk with a Heart of Gold: The Heart of Gold aspect becomes more apparent with Character Development.
  • Kid-anova: He's a pre-teen yet has gotten the attention of a few females, one of which older than him.
  • Large Ham: Befitting his loud fighting style.
  • Love at First Sight: Towards Lina.
  • Obfuscating Stupidity: 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.
  • Official Couple: With Lina.
  • Pint-Sized Powerhouse
  • Polar Opposite Twins: With Yin.
  • Power Glows: His sword glows when it is especially powerful, most likely through charginng it with woo-foo energy.
  • Purple Eyes: Which he seems to have inherited from Yo.
  • Red Oni, Blue Oni: Red to Yin's blue.
  • Stalker with a Crush: A mild example though it's no longer the case when him and Lina become a couple.
  • Sword and Sorcerer: 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".
  • Vitriolic Best Buds: With Roger Jr.
  • White Bunny: Colorfully averted.
  • Why Did It Have to Be Snakes?: He hates dentists.
  • You Gotta Have Blue Hair: Yang is a blue rabbit.

    Yin 
http://static.tvtropes.org/pmwiki/pub/images/yin.jpg
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's often as stubborn as her brother while being a "neat freak" and a "control freak." Yin generally has a good sense of right and wrong, and will often do the right thing.

    Master Yo 
http://static.tvtropes.org/pmwiki/pub/images/master_yo.PNG
Voiced by: Martin Roach

Teacher of Yin and Yang, Yo is a grumpy old panda whose age is unknown though implied to be a centenarian (as he'd missed his 117th high school reunion). Yo has great sage wisdom and is a master in the Woo Foo arts, but is also pretty lazy and prone to lounging around. 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.
  • Action Dad: He turns out to be the biological father of Yin and Yang.
  • Afro Asskicker: Back in his younger days, he dawned skills as broad as his afro.
  • Badass Adorable: When he was reverted to a toddler in an episode. Even at three years old, he was already more talented and powerful than Yin and Yang combined. He could already use Woofoo Aura better than them and even some unique tricks like calling down thunder with Woofoo Lightning. Lampshaded:
    Yin: He's only 3 and he can Fooportate?!
    Yang: No wonder he's a Master!
  • Badass Grandpa: More than a century old, but till capable of kicking butt.
  • Brilliant, but Lazy: He's a master of Woo Foo, but is now perfectly content to lounge around and do nothing.
  • Child Prodigy: Look at Badass Adorable above. Considering he mastered skills that Yin and Yang barely even know about at only three, he qualifies.
  • Deadpan Snarker
  • Dirty Old Man: Attends a macrame gathering with Yin just so he can meet up with single women that are most likely way younger than he is.
  • Funny Afro: Sported one back when he was younger though it's entirely withered away as he's aged.
  • Grumpy Old Man
  • Hero of Another Story: 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.
  • I Am Big Boned: In an episode where he was losing layers of his body and stripped down to bone, he mentions this. He retains this mindset when his flesh returns.
  • Inter Species Romance: In relation to the previous trope, Yo should have had a rabbit girlfriend/wife.
  • Jerk with a Heart of Gold: A lazy, gluttonous, and rude old pada, but he does care a lot about Yin and Yang and is willing to do what he can to protect them.
  • Last of His Kind: He's the last panda on earth.
  • Luke, I Am Your Father: He's Yin and Yang's missing dad.
  • Panda-ing to the Audience
  • Papa Wolf: 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 he's their biological father.
  • Parental Substitute: Has practically raised two children due to their absence of their actual parents. Though it later turns out that he was their father all along and had his memory wiped of that knowledge to train them "without bias and fear."
  • Purple Eyes
  • Old Master: A spoofed example.
  • Spirit Advisor: Despite he's still alive, his spirit appears to advice Yin and Yang when he's not present.
  • Trademark Favorite Food: He loves his soft pretzals.
  • Trickster Mentor: He takes some pleasure in letting his students make their mistakes and him rubbing it in their faces regarding his advice.

Allies

    Lina 
http://static.tvtropes.org/pmwiki/pub/images/lina.PNG
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.

    Roger Jr. 
http://static.tvtropes.org/pmwiki/pub/images/rogerjr.PNG
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.
  • Breath Weapon: He has the ability to breathe fire.
  • Friendly Enemy: At first, Roger Jr. was a bully to Yin and Yang, having mock fights with Yang and teasing him and Yin, but during Woofoogeddon/Who Knows What Evil Lurks, it was revealed he longed to be Yang's best friend. In Season 2, he ultimately ends up be friending Yin and Yang and their other friends.
  • Jerkass Façade: He pretends to hate Yang, but he longs to be his friend.
  • Nice Hat: His baseball cap.
  • Super Strength: Roger Jr. Being a monster, has displayed super strength such as when he easily took a whole group of the Night Master's soldiers just by running by them with his arms.
  • Vitriolic Best Buds: With Yang.

    Dave 
http://static.tvtropes.org/pmwiki/pub/images/daveyyy.jpg
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's considered 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.
  • Butt Monkey: Is constantly deemed annoying and whiny by anyone who meets him, including his group of friends.
  • The Chew Toy: Which is saying something given how much slapstick everyone else suffers.
  • Green Thumb: Can communicate and manipulate other plants which ends up making him quite powerful.
  • Nice Hat: His baseball cap.
  • Plant Person: Literally a talking tree stump. He even has a squirrel living in him.
  • Purple Eyes
  • Took a Level in Badass: Learns about his abilities during "Stuck" and from then on has been able to use to help out.
  • Youthful Freckles

    Coop 
http://static.tvtropes.org/pmwiki/pub/images/coop_yin_yang_yo.jpg
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.
  • Abhorrent Admirer: 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.
  • All Love Is Unrequited: His feelings towards Yin seem like they'll never be returned that is until the ending of the series when Yin seems to return his feelings.
  • Inter Species Romance: A chicken who has, occasionally, gotten romantically involved with a rabbit.
  • Nerd Glasses
  • Official Couple: Later gets the relationship he's been yearning for with Yin.
  • Punny Name: A chicken named Coop, as in a chicken coop.
  • Single-Target Sexuality: Only shows to have eyes for Yin the entire series...unless you count his strange fondness for corn (though he is a chicken.)
  • Stalker with a Crush: To Yin.
  • Took a Level in Badass: In his quest to try and win Yin's affection, he trains under the Night Master and quickly becomes as strong as Yin anf Yang. He does furhter still when he absorbs some of the Night Master's power in Season 2 aand learns to control it.
  • Super-Powered Evil Side: 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. Of course, this nearly corrupts Yin and he disappears for several episodes to control his evil side.
  • Verbal Tic: "Buckaw!"

    Muffin, The Town President 
http://static.tvtropes.org/pmwiki/pub/images/image102.png
Voiced by: N/A

Description coming soon.
  • Amazing Technicolor Wildlife: He's a green goat.
  • Butt Monkey: He is usually attacked by Carl.
  • I Lied: In one episode when he promised Yin and Yang that he'd get them into a hip club.
  • It's All About Me: He's a bit egomaniacal, often losing sight of what's moral.
  • Jerkass: He cares mostly about his publicity and popularity (although he does care for his cat Puddin Paws), and is even willing to take credit for the deeds Yin and Yang perform in order to attain it.
  • Mayor Pain: The mayor of the town and a real jerkass.
  • No Name Given: His real name is unknown, as Carl randomly started calling him Muffin the first time he captured him, and everyone else (including the President/Mayor himself) has been using it ever since.

    Jobeaux 
http://static.tvtropes.org/pmwiki/pub/images/jobeaux_cute.png
Voiced by: Bill Engvall

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.
  • Deep South: He lives in Redneckistan.
  • Modest Royalty: 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.
  • Royals Who Actually Do Something: Takes a very active role in his kingdom and seems to be the most active method of defense.
  • Warrior Prince: Yes, it's hard to believe, but he's a prince.

    The Boogeyman 
http://static.tvtropes.org/pmwiki/pub/images/boogeyman18.png

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.
  • Afro Ass Kicker: A Woo Foo knight who sports an afro.
  • Cool Shades: A circular, pink pair.
  • Disco Dan: Boogeyman is a disco-loving green monster, and has a funky speech that's hard for anyone to understand.
  • Early-Bird Cameo: Appears as a minor character in The Howl of the Weenie.
  • Funny Afro: A purple afro to be exact.
  • Real Men Wear Pink: His entire outfit (sans the belt, glasses, and shoes) is pink.
  • The Unintelligible: "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.
  • You Gotta Have Blue Hair: He has purple hair.

Villains

    The Night Master 
http://static.tvtropes.org/pmwiki/pub/images/night_master.PNG
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.
  • As Long as There Is Evil: 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.
  • Bat out of Hell: Resembles an incredibly tall and thin bat wearing a cloak.
  • Big Bad: Season 1.
  • The Comically Serious: It's his short temper and serious nature towards most things that make his interactions with more zany characters all the more comical.
  • Dark Is Edgy: 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.
  • Dark Is Evil
  • Evil Laugh
  • Evil Overlord
  • Evil Sorcerer
  • Expy: Aku of Samurai Jack.
  • The Heavy: 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.
  • Knight of Cerebus: 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
  • Lean and Mean
  • Names to Run Away from Really Fast
  • Obviously Evil: 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.
  • Red and Black and Evil All Over: The marks around his eyes are red and his cloak is black with red underneath.
  • Red Eyes, Take Warning: Sometimes they are most noticeable when he's in the dark.
  • Surrounded by Idiots: He's pretty smart himself, it's just that his minions tend to be much less intelligent than him and screw up his plans.
  • The Trickster: Enough to get Yin and Yang to accidentally free him.
  • Weakened by the Light: His main weakness is sunlight which is why he always looms in the darkness to avoid being burned to death.
  • Vile Villain, Saccharine Show: 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.

    Carl, the Evil Cockroach Wizard 
http://static.tvtropes.org/pmwiki/pub/images/yin_yang_yo_6.jpg
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 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.
  • Affably Evil: He's pretty friendly with the twins even during evil schemes and the two have allied on occasion.
  • Ambiguously Gay
  • Breaking the Fourth Wall
  • Butt Monkey
  • Card-Carrying Villain: Loves to show off he is evil.
  • Deadpan Snarker: Easily one of the more sarcastic characters.
  • Disappeared Dad: While seen interacting with his brother and mother, no mention of a father.
  • Enemy Mine: One of the only villains to team up with Yin and Yang. He even considered a Heel–Face Turn in one episode but was rejected.
  • Evil Is Petty: 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! Petty jealousy?
  • Evil Sorcerer
  • Green Eyes: Possibly indicative of his jealousy of his brother and/or to invoke Emerald Power.
  • Not-So-Harmless Villain: He's powerful enough to take out the Night Master's Elite Mooks in droves during the season one finale. He is also the member of the Rogues Gallery 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.
  • Paper-Thin Disguise: 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 crossdressing, and at least once it wasn't even necessary.
    Herman: Exactly why do we have to dress like plumbers to sneak into a bathroom window?
    Carl: You know me, I like to play dress-up.
  • Sibling Yin-Yang: With Herman.
  • Supernatural Is Purple: His cape is purple.
  • Sword and Sorcerer: When cooperating with Herman, with him as Sorcerer.
  • The Unfavorite: His mother prefers Herman over him, due to his brother's success.
  • Weaksauce Weakness: His weak self-esteem and short temper means that insults throw him off his game pretty easily. Yang exploits this very often.
  • Woobie, Destroyer of Worlds: 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.

    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.

    Ella Mental 
http://static.tvtropes.org/pmwiki/pub/images/ella_mental.JPG
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.
  • Dark Action Girl
  • The Dark Chick
  • Deadpan Snarker: Normally in response to the other's incompetence.
  • Evil Genius: 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.
  • Fiery Redhead: Mostly averted as she's easily the most level headed member of the team and a brunette, but does have a tendency to become incredibly malicious and loud if angered.
  • Fingerless Hands
  • Flight: Is one of few characters shown to have this ability.
  • Magic Staff: Regularly holds a long staff with a glowing red orb at the top.
  • Mini Dress Of Power
  • Psychic Powers: 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.
  • Proud Beauty: Holds a lot of satisfaction in her attractiveness and doesn't take it well when Yin thinks she's not that hot.
  • Punny Name: Sounds like "elemental".
  • Vain Sorceress: Less magic and more psychic powers, but still fits.

    Indestructo-Bob 
http://static.tvtropes.org/pmwiki/pub/images/bob1.jpg
Voiced by: Tony Daniels

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

    Rubber Chucky 
http://static.tvtropes.org/pmwiki/pub/images/chunky.png
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.

    Molecu-Lars 
http://static.tvtropes.org/pmwiki/pub/images/larsyyy.jpg
Voiced by: David Berni

A villain who can shapeshift and regenerate his limbs.

    Brother Herman 
http://static.tvtropes.org/pmwiki/pub/images/herman.PNG
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.

    Ultimoose 
http://static.tvtropes.org/pmwiki/pub/images/ultimoose.PNG
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.

    Yuck 
http://static.tvtropes.org/pmwiki/pub/images/eca_yin_yang_yo.jpg
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.
  • All Your Powers Combined: He has all of Yin and Yang's abilities
  • Arrogant Woo Foo Guy
  • Ax-Crazy: 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 Adorable: 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.
  • Big Eater: Eats an entire pie and a pizza in his debut episode in just a few bites, normally making a mess along the way.
  • Blood Knight: Having Yang's aggression, this is a given.
  • Blow You Away: "Yuck-i-cane!"
  • Calling Your Attacks: Sometimes
  • Control Freak: Obtains an obsessively controlling personality on behalf of Yin.
  • Energy Ball: Is able to devise a ginormous sphere of green energy on one finger strong enough implode an entire town.
  • Evil Counterpart: To both Yin and Yang.
  • Fangs Are Evil
  • Good Costume Switch: In "Upstanding Yuck" he wears a non ripped shirt, seems to have bathed himself, and slicks back his fur.
  • Heel–Face Revolving Door: 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.
  • Hiccup Hijinks: 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
  • Killer Rabbit: An almost literal version.
  • Large Ham: 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 whenever he makes an entrance.
    Yeah baby, I'm back!
  • Magic Knight: Dual-wields the Might and Magic capabilities of Woo-Foo.
  • Made of Evil: Made from the negative qualities of Yin and Yang (specifically bossiness/need for control and impatience/violent streak).
  • Manipulative Bastard: Has proved himself capable of plotting multiple people to his schemes.
  • Master of Disguise: 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.
  • Never My Fault: 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.
  • The Pig Pen
  • Pint-Sized Powerhouse
  • Playing with Fire: Is capable of doing the Fists of Fire when he's first made, just to prove how powerful he already was.
  • Sickly Green Glow: His magic is this color.
  • Slasher Smile
  • Smug Super: Always feels the need to point out how he's a Level 5 Woo Foo Warrior and he's still hungry for more power.
  • Third-Person Person: 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!".
  • Vocal Evolution: 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.

    Smoke 
http://static.tvtropes.org/pmwiki/pub/images/smokeying.jpg
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.

    Mirrors 
http://static.tvtropes.org/pmwiki/pub/images/mirrors.PNG
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.

    Saranoia 
http://static.tvtropes.org/pmwiki/pub/images/saranoia.PNG
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.

    Zarnot 
http://static.tvtropes.org/pmwiki/pub/images/zarnot8.png
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.
  • Brought to You by the Letter "S": He has a stylized "Z" around his chest area.
  • Card-Carrying Villain: He wants to be one.
  • Crazy Jealous Guy: A platonic version. It has been revealed in "Dummy Up" that Zarnot still desires Yang's affection and attention, and seems to grow insane jealousies towards any other toy that Yang might be playing with (such as Yochop). Whenver Yang ignores him, he seems to want Yang's attention more, and is willing to go far lengths to attain it.
  • Dark Is Evil: His main color scheme are dark blue and black.
  • Evil Is Hammy: He uses the same villain cliches.
  • Humongous Mecha: Subverted for most of the time, but sometimes displays the ability to grow huge

    Pondscum 
http://static.tvtropes.org/pmwiki/pub/images/pond.png
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.
  • Disco Dan: Loves to disco dance.
  • Funny Foreigner: A Swedish fish who loves disco.
  • Gold Makes Everything Shiny: Pondscum even wears a gold made suit. He is obsessed with "bling-bling", and will get it at all costs. Even his sidekicks are equipped with gold armor when a battle gets serious.
  • Insistent Terminology: Insists that people pronounce the U with the umlaut in his name properly.
  • Light Is Not Good: He wears shiny gold, but is a definite antagonist.
  • Negative Continuity: He was revealed to be a frog in "Deja Foo", but in "Welcome to the Dark Tomorrow" was a fish again.
  • Sidekick: The Blixens.

    Chung Pow Kitties 
http://static.tvtropes.org/pmwiki/pub/images/cpk.PNG

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.

    Kraggler 
http://static.tvtropes.org/pmwiki/pub/images/kraggler.PNG
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.

    Mastermind 
http://static.tvtropes.org/pmwiki/pub/images/mastermind.JPG
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.
  • Diabolical Mastermind: Mastermind is power hungry, and wishes to gain full domination of the planet as he did in the past.
  • The Ditz: "I was the ruler of an empire that covered over twelve continents in a world that only had seven!"
  • Evil Brit: He has a British accent and is a Diabolical Mastermind.
  • Green and Mean: He emits green flames and is one of show's antagonists.
  • Hair-Trigger Temper: He also has a short temper, which results that his head is engulfed in green flames which are usually extinguished by emergency water sprinklers.
  • Was Once a Man: He was once a human wizard.

    The Manotaur 
http://static.tvtropes.org/pmwiki/pub/images/the_manotaur.PNG
Voiced by: Seth MacFarlane

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.
  • Ambiguously Bi: He's trying to win over Womanotaur and he has an interesting fashion sense.
  • Bald of Evil: He's bald and his plan was to kidnap all the Twonicorns and to shave off all their hair to make a large wig to cover up his really smooth, bald head to get a date with the Womanotaur.
  • Evil Lawyer Joke: Becomes on in "Game Over".
  • Four-Fingered Hands: Unlike the rest of the cast, he subverts it. Most of the cast treat it as a horrifying thing that he has five fingers.
  • Half-Human Hybrid: Half man, half minotaur.
  • Large Ham
  • Real Men Wear Pink: He's not ashamed of wearing a pink shirt or sweater.

http://tvtropes.org/pmwiki/pmwiki.php/Characters/YinYangYo