Xiaolin Showdown

Xiaolin Showdown is an American animated television series that aired on Kids WB and was created by Christy Hui. It's set in a world where martial arts battles and Eastern magic are commonplace, the series follows four young Xiaolin warriors in training who battle the Heylin forces of evil. They do this by protecting Shen Gong Wu (ancient artifacts that have great magical powers) from villains that would use them to conquer the world. Typical episodes revolve around a specific Shen Gong Wu being revealed which results in both sides racing to find it. Episodes usually reach a head when one good and one evil character must challenge each other to a magical duel called a Xiaolin Showdown for possession of the artifact.

Sapphire Dragon(Season 1, Episode 8)
The sapphire dragon transform the monks in sapphire zombies who obey all his commands.

Screams of the Sirens (Season 2, Episode 16)
After a Xiaolin Showdown, the Xiaolin Warriors find the mermaid Dyris frozen in ice. After freeing her, she is attacked by a warrior who was also frozen in ice, named Klofange, who Dyris says is trying to destroy all mermaids and she is the last. Jack takes Klofange to his headquarters, and the Xiaolin take Dyris to the temple. When the Xiaolin learn that Dyris is an evil siren who wants to flood the world using underwater volcanoes and rule it, they must defeat her in a Xiaolin Showdown to save the Earth.

Near the end, Dyris hypnotizes Omi into falling under her spell for a brief amount of time after hitting her.

The Return of PandaBubba(Season 2, Episode 30)
The Xiaolin go to Tokyo to retrieve the Zing-Zom Bone, a Shen Gong Wu that turns people into zombies, but Jack gets to it first. Then, Kimiko learns that her father has been tricked into working with Hong Kong crime boss PandaBubba, and that Jack has given him the Zing-Zom Bone. In order to prevent PandaBubba from turning people into zombies, Kimiko must defeat him in a Xiaolin Showdown.

Saving Omi(Season 2,episode 39) & Finding Omi(Season 3, Episode 40)
Omi becomes evil after using the Yin Yang Yo-Yo, and when the Xiaolin Warriors try to save him, a strange creature eats their souls, and now they obey every command of Chase, who orders to do his laundry.

Chucky Choo(Season 3, episode 48)
After learning a con dragon named Chucky Choo sold fake Shen Gong Wu to them, Wuya, Jack, and Cyclops vow revenge on him.

Kimiko use the Yin-Yang Yo-Yo in this episode and becomes evil for a brief moment.