Yin Yang Yo! episode
“Yin Yang Who?”
239 - Yin Yang Who?
Episode no. Season 2
Episode 39
Original airdate April 18, 2009
Season 2
January 1, 2008 – Present
  1. "The Pecking Order / Party Favors"
  2. "Smoke and Mirrors / Yin-credible"
  3. "Season's Beatings / Splitting Hares"
  4. "Brain Drain / The Big Payback"
  5. "Imperfect Fooplicates / Messy Relationships"
  6. "A Bad Case of the Buglies / Control Issues"
  7. "Foreign Exchange Problem / Turnabout"
  8. " The Manotaur / League of Evil"
  9. "This Yang Isn't Brought to You By... / Stuck"
  10. "Deja Foo"
  11. "Gone-A-Fowl"
  12. "Basic Yin-stinct / Fighting Fooberty"
  13. "Wonder Tweens Go! / Touchy Feelings"
  14. "O'Brother There Art Thou / Roger...Over and Out"
  15. "Yin, Yang, Carl / Smorks"
  16. "An Inconvenient Tooth / Situation Tragedy"
  17. "Camp Magic Pants / Worked Stiff"
  18. "Skirting the Issue / Moon Over My Yinnie"
  19. "For the Love of Clamboy / Zarnot's Girlfriend"
  20. "Clown-Fu Fighting / Cat Smash Fever"
  21. "Mission Yinpossible / Disapp-Eared"
  22. "Get Off My Back / Slumber Party of Doooom"
  23. "Old Softie / Dance Dance Devastation"
  24. "Upstanding Yuck / A Walk in the Woods"
  25. "Welcome To The Dark Tomorrow"
  26. "Today You Are a Bear / Pets Peeved"
  27. "The Howl of the Weenie"
  28. "Extra Cheese, Anchovies and Doom! / The Confidence Game"
  29. "Roboticus Maximus / Size Matters"
  30. "Unmoving Pictures / The Recline and Fall of Civilization"
  31. "Mind Games / The Carl of the Wild"
  32. "Clothes Encounters / Commander-in-Cheat"
  33. "The Secret Life of Possum Panda / Dummy Up"
  34. "Game Over / Creeping With the Enemy"
  35. "The Yindianapolis 500 / Personality Problem"
  36. "Yin Yang You!"
  37. "Party Troopers / Shadowcluck"
  38. "Division Quest"
  39. "Yin Yang Who?"

Season 1
List of episodes


This episode aired in April 18, 2009.

The Next battle with Eradicus has come at last! Unfortunately for Yin and Yang, the parents of their Woo Foo Army refuse to let their kids fight! Even worse, Eradicus has learned from a captured Master Yo the darkest secret of Woo Foo: The Woo Foo Aura Drain! And he has used it to zap Yin of her aura! The only cure is an Aura Transfusion from a parent (or children which Yin and Yang do not have)! Now, Yang's sword must guide Yin and Yang to their long-lost parents before Yin vanishes from existence while Eradicus's forces decimate their defenseless town! Who are Yin & Yang's parents? Will their army be allowed to fight? Will Eradicus be defeated for good, or is the world doomed to become a modernless wasteland filled with Eradicus's accordion-based terror?!


Eradicus has gathered the required information from Master Yo about the most lethal power to use against a Woo Foo warrior: the Woo Foo Aura Drain.

As Eradicus initiates his final assault on the town, the Woo Foo Army is prevented from fighting by their respective families. To make matters even worse, Yin's Aura is completely drained by him! The only known cure for an Aura Drain is having an aura donor, which must be a parent.

With this realization, Yin and Yang begin a search for the parents they've never known, only to be led into a trap and subsequently imprisoned in Eradicus's cave by Yang's Sword. There, they find Master Yo unconscious. However it seems Yang's sword has not misguided them. Unknowingly, Yang transfers part of his aura into Yo's body, who in turn saves Yin. Both are dumbfounded by the scenario. But then Yo explains that he is Yin and Yang's biological father after catching a glimpse of his life so far (the "Edge of Aliveatude") in his stasis state.

Yin, Yang and Yo then finally make their escape from their holding cell and immediately hurry to the town to engage in one next battle against Eradicus! But even with their Auras combined, the tide of the battle is still tipped to Eradicus' faovr. In a remarkable turn of events, all the members of The Woo Foo Army have been given permission by their parents to fight Eradicus and his Army. The entire Woo Foo army then lend their Woo Foo Energies, resulting into an Aura of even greater size and power! With the combined efforts of Yin, Yang, Yo and their army, Eradicus is finally defeated and he, his minions and his army are banished into a dimensional vortex, the same fate of the Night Master since Night Fall.

After, a montage is presented, showcasing the Woo Foo practitioners regarded for their heroism and continue carrying out their heroic actions. Yin and Yang are also officially declared Level 2 Woo Foo Knights, leaving them to question Yo on who their mother is. The episode ends with a new villain, Ferocitus, introduced, and Yin, Yang and Master Yo yelling out their battle cry - "Yin! Yang! Yo! Let's go!" - as they face this new villains Just Begun

Main Antagonist

Eradicus and his minions

Woo Foo Weapons Introduced


Woo Foo Techniques Introduced

Woo Foo Aura Drain


  • This episode is the season finale for Yin Yang Yo! season 2 as well as the series finale since the series was suddenly cancelled.
  • In this episode the identity of Yin and Yang's father has been revealed: it appears that Master Yo was the biological father of Yin and Yang the whole time and that he couldn't remember due to Masters Ti and Chai having erased Yo's memories in order for him to train them unbiasedly without worry for their safety.
  • Ultimoose is declared as a threat to himself, not to society.
  • Lina, Roger Jr., Dave, Coop, Jobeaux and the rest of the members of the Woo Foo army become Woo Foo knights and are meritted for their heroism against Eradicus.
  • According to the show's creator Bob Boyle, Yin Yang Yo! would return for a third season On Nickelodeon sometime in 2010, with Ferocitus as the possible main antagonist. However, due Jetix's departure from the TV and the appearance of Disney XD, the show was sadly cancelled.
    • However after according to the above, in September 2016, a petition was started for convince The Walt Disney Company of greelight the production of a revival season (or a feature-length film or a spin-off if is possible).[1]
  • This episode appears to have demonstrated family-genre themes the most in the entire series.
  • It was announced that the show will not return for the third season, because the second season would be it’s series last. Seems like there’s no hope.


Yin Yang Yo! - Yin Yang Who (Part 1)

Yin Yang Yo! - Yin Yang Who (Part 1)

Yin Yang Yo! - Yin Yang Who (Part 2)

Yin Yang Yo! - Yin Yang Who (Part 2)


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