Yin reluctantly goes on a date with Coop, and she falls under his evil spell.

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

Yang hurts Yin's feelings when he starts training under Ultimoose.

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.

Badfoot tries to steal a powerful artifact from Master Yo.

Carl attempts to blot out the rays of the sun.

Yang loses his emotions after he is zapped by Fred.

Yin and Yang are magically stuck together by Mastermind so they will learn to cooperate with each other.

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

Yin, Yang and some of their friends accept a free vacation to a mysterious island, not knowing that it's a trap set by Smoke.

When Yang separates himself from Yin and Master Yo, he saves a robot, and they start to act like brothers. But Yin is feeling suspicious and jealous and discovers the robot is actually a spy made by Zarnot sent to destroy Yang.

Yang takes a job at an amusement park that turns out to be anything but fun.

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

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.

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.

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

Yin hosts her first slumber party but she drives everyone crazy with her strict schedule.

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

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

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.

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.

Yin and Yang prepare to go on vacation. Coop returns and tried to warn them of The Night Master's energy escaping, but they ignore him until it's too late.

Ultimoose and Yang search for an amulet that will give them all of the Night Master's powers.

Yin and Yang begin magic training at Camp Magic Pants and become involved in pranks that get them into trouble.

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