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Yuck is an antagonist in Yin Yang Yo!. He is an Evil Level 5 Woo Foo Warrior who originally was an entity formed from Yin's obsession with control and Yang's aggression. Yuck wants nothing more than to become the most powerful Woo Foo Knight ever, and to do that, he needs to eliminate Yin & Yang plus Master Yo.

He was voiced by Scott McCord.


He first appears in "Yin, Yang, Yuck", where Yin and Yang accidentally created him by splitting their personalities up, causing it to create an evil rabbit named Yuck. Later in "Falling Yin Love", where he pretended to be Brett, Yin's boyfriend where she went to go on a date with him.

In the episode "Upstanding Yuck", he became good, but Yin and Yang didn't believe him. In the end, Yuck turned evil again after Yin and Yang attacked him many times. Despite being half female, Yuck is often considered a "he" and lacks eyelashes, much like Yin and Yang's combined Aura. His last appearance was in the episode "Personality Problem", where he feeds on the aura of Yin and Yang to have more power, but in the end, Yin and Yang manage to combine their auras to fight. Yuck has no choice but to escape them but is finally defeated when Yin and Yang beat him by pulling up a mountain. It is unknown what happened to him, because after this episode he did not reappear in the series.

Powers and Abilities

Yuck, being a creation of Yin & Yang, has all their abilities, plus his own "Foonado" called a "Yuckicane". He has also been shown to use Energy Rays, Levitation, Foo Field, Fists of Fire, Foo-portate, Foo Orbs, Paws of Power, Bamboo Weaponry, Aura Swap, and Foo-Plicate (with the Foo-Plication Charm). He also seems to be able to possess people, as seen in the episode "Camp Magic Pants". He can also change into his muscular form at will. He also has superspeed and super strength and super jumping and he is super smart.


  • Yang: Not much is shown about Yuck and Yang's relationship but it is known that Yang hates Yuck because he hurt Yin's feelings. It is shown in Imperfect Fooplicates that Yuck is also smarter then Yang, knowing math.
  • Yin: Yin and Yuck are enemies. Throughout the series, he appears to have more of a relationship with her than Yang, since he tricks her most of the time ("Falling Yin Love", "Camp Magic Pants") but never focuses his schemes on Yang. At the end of "Falling Yin Love" he appears quite happy when she lies about liking his true self. Furthermore, he dislikes his girl part, which he inherited from Yin. This may partially stem from Yang's dislike of girly things, as he was made of the twos negative properties.
  • Yo: Yuck hates Yo with all of his might because he refused to train him and Yuck even tried to kill him.


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