2. Finding Hershel

Master Yo gives his young protégés a test, which involves having them watch a seemingly harmless rock named Hershel.

3. 600 Channels of Doom!

Carl, the Evil Cockroach wizard, gives Yin and Yang a new TV with only one remote. Yin and Yang fight over the remote, giving Carl a chance to destroy them.

4. An Oldie But a Goodie

Yin and Yang tell Yo that he is old, and Yo makes them pick up his medication. Yo throws a party to look cool, but Yin and Yang make Yo's old enemy, Kraggler, mad. Kraggler turns everyone, except Yin and Yang, into old people.

5. Yin Yang Yuck!

Yin and Yang wish to lose their bossiness and aggression and in the process accidentally create a new villain, Yuck.

6. Beetlemania

Yang fakes being a Woo Foo Warrior to impress a girl. To prove his skills, he has to take out a huge steel beetle.

7. Enter: The Ant

Yin and Yang try to teach Yo that it's not good to boss kids around, but little do they know, Herman the Evil Ant is waiting for the panda to leave so he can conquer the world.

8. Sweet Stench of Love

Yin and Yang get into a fight while cleaning their room, and when Yin costs Yang the world record at a video game, he refuses to shower until one of them cracks and apologizes. But Yang is soon encouraged to clean himself up when his odor attracts the amorous advances of Malodia the Elephant, Princess of the Stink Aardvarks.

9. Woo Foo Flu

Yin comes down with a case of the Woo Foo Flu, an illness that causes her to bend reality whenever she sneezes. Master Yo orders Yang to take care of her while Master Yo concocts an antidote for the Woo Foo Flu. However, Yin later gets captured by Carl - who intends to exploit her illness so it can help him take over the world - and Yang may have to get himself sick to save Yin.

10. The Imagination Situation

Yin and Yang use Zarnot to boost their popularity by lying. When Zarnot becomes huge, they must prove that they are telling the truth.

11. Too Much Yangformation

12. Aura... or Not

Yin's Woo Foo Aura gets out of control, trying to save the environment and escapes Yin's body, destroying the town.

13. Falling Yin Love

Yin falls in love with a person named Brett who actually turns out to be Yuck.

14. On Golden Pondscum

Yin and Yang have to stop Pondscum from stealing Yo's golden chair.

15. Old School

Kraggler uses the cronalogicum to trade ages with Yin and Yang so he can become young again.

16. A Toy's Story

Yang won a doll at the county fair for Yin, but the doll is actually Zarnot.

17. The Trouble with Two-ni-corns

Yo tells Yin to go to the valley of the two-ni-corns and find a rainbow mane The Gnu to fix her toy. Meanwhile, Yang is taken over by Ultimoose.

18. Scarf It Up!

Saranoia makes a snow day so that Yin and Yang can play outside and Yin may have a day off, as she holds an obsession with Yin's future

19. Return of the Night Master

The Night Master rebuilds his armies that were frozen years ago by Master Yo. Little do they know, Yin and Yang are involved in his plan.

20. My Stupid Sword

Yang is thrilled that the CPK (Chung Pow Kitties; a pastiche of Hello Kitty and Powerpuff Girls), a rock band made of cats with mad ninja skills in town. Not only that, but they also appear on Broadway and are looking for a new member. Having a sharp sword is a requirement. Yang's bamboo sword isn't sharp enough, but Master Yo refuses to give Yang a new sword. Yang plots to steal weapons from the Forbidden Armory to try to make the cut.

21. Neat Freak

Yin meets a hamster who loves to clean while she is out buying cleaning supplies. The hamster reveals himself to be Fastidious, and asks the Woo Foo students to help him defeat some of the spirits who have been making a mess. However, there is something sinister about Fastidious.

22. The High She-as

Yin and Yang are fishing when a group of female pirates appear. They act really nice towards Yin, but not so much towards Yang. Are these pirates all they appear to be, or is there something else about them?

23. A Match Not Made In Heaven

Carl wants to use his mother's destructive jewelry for his nefarious purposes (especially since she never wears them) but his mother, Edna, won't let him. Meanwhile, Yang pulls a practical joke on Master Yo by posting his bio on a website for dating service for old people. Master Yo's blind date turns out to be Edna. Can Yin and Yang break up this relationship that's not meant to be before Carl can take advantage of his mother's absence?

24. Scary Scary Quite Contrary

Master Yo shows Yin and Yang that black-and-white films can be scary.

25. How the Cookie Crumbles

Yin uses the misfortune cookies on Yang to take away his good luck.

26. The Yin of Yang

Yang is really interested in a girl named Lina, who is Yin's really good friend. The trouble is, Yang's behavior turns Lina off. So Master Yo suggests that Yang should try to be more like Yin in order to make Lina like him.

27. Shopping Sprawl

Yin and Yang are fed up with not getting an allowance from Master Yo for doing chores around the dojo. Then a stranger appears, announcing the opening of a new UltraMega Mall in their town and giving the two young warriors credit cards to their heart's content. Are Yin and Yang playing directly into an evil villain's plans?

28. Wubble in Paradise

Yin and Yang host an awards show for evil Brother Herman.

29. Dictator of the Year

The Night Master hides in Yang's imagination.

30. Master Dave

A new master is in charge.

31. Destination Danger

A fun road trip serves as a cover for a covert operation.

32. Bad Nanny Jamma

Dressed as a donkey, Yin and Yang infiltrate a bad-guy convention.

33. Pros and Cons

Saranoia returns.

34. The Gig Is Up

Yin and Yang meet the legendary Woo Foo twins.

35. Doomed to Repeat It

Coop teams up with Yin and Yang to win back an ancient Woo Foo artifact.

36. Family Day

Herman and Carl want to give their mom a pair of rabbit's feet for luck.

37. The Hex of the Ex

Master Yo's ex-girlfriends show up.

38. Out on a Pledge

Yang finally makes some guy friends, but they're not who they say they are.

39. Dojo Alone

Brother Herman attacks while Master Yo is away.

40. Attack of the Lesson

A heavy-handed hero teaches everyone a lesson.

41. A Case of Evils

Yin and Yang wonder if Master Yo is really evil.

42. Attack of the Vidiots

Yang acts up in a video game.

43. Fit to be Tried

Yin and Yang are put on trial.

44. Voyage to the Center of the Yo

Yin and Yang follow Yuck to a terrifying place... inside Master Yo.

45. Sitting Shaggler

Shaggler turns into a baby.

46. Shadows and Light

Yang uses an ancient tool to end Yin's constant pursuit of popularity.

47. The Truth Hurts

Yin and Yang are promoted.

48. Who Knows What Evil Lurks

Information on Yin and Yang is leaked to the Night Master and the twins try to find the culprit.

49. Night Fall

The Night Master plots to kidnap Master Yo so he can plunge the world into darkness and be free.