The Powerpuff Girls fight Mojo Jojo after he kidnaps kindergarten students in a cage and steal their candy. ---- The origins of the Powerpuff Girls Z are revealed through the source of "Chemical Z".
Professor Utonium, his son Ken, Blossom, the Mayor, and Ms. Bellum and Poochi find Bubbles jumping cheerfully as she is attacked by Mojo Jojo and takes them in for research.
Buttercup reluctantly joins the group but don’t really wanna be 'bestie' with Blossom and Bubbles but the girls are put into the same class to make them get along to stop Mojo from hogging all the food in a restaurant if they want to being at time for lunch!
The girls take turns being a mother figure to Ken, while Mojo plans to turn everyone into monkeys and his first victim is Ken!
Angry with being teased at the zoo, Mojo attacks a fruit seller. ---- Professor Utonium, Mr. Mayor, Ms. Bellum and the girls inspect the tall building which will become Mayor's Tower when Mojo tries to claim it to.
Fuzzy Lumpkins keeps driving the girls and friends away while they try to enjoy a trip to the woods. ---- Classmate Princess Morbucks (Himeko) is hit by the black Z-Rays and plots to outshine the Powerpuff Girls.
Blossom is given the task of being the bodyguard of her favorite TV hero, Johnny Cosmo when Mojo threatens him. ---- The Amoeba Boys (now including a lady) attempt to become villains with little success.
A local shop owner and the Girl's friend, Annie is hit by black Z-rays turning her into the monster Sedusa! She attempts to glamour herself to win the heart of her friend Jason.
Buttercup trains a young kid named Justin to become a better soccer player. ---- After falling in love with Ms. Bellum, Fuzzy decides to take her back to the woods.
The arrogant hairdresser Gilbert is hit by black Z-Rays and uses his power to hypnotize the customers to accept his eccentric hairstyle.
Friends in High Places: Believing Blossom, Bubbles and Buttercup are planning to show off, Princess follows them to unearth their plan.Happy Birthday, New Townsville: Mojo decides to steal all the cakes in the city.
Bubbles reminisces about Cody a boy she met when she was six years old, who promised to meet her again someday, but he gets hit by a black Z-Ray and turns into werewolf.
Mojo and the Amoeba Boys: Mojo decides to teach the Amoeba Boys how to become villains.Revenge of Negatron: A camera thrown away by the Mayor takes out his revenge by turning New Townsville black and white.
The Gangreen Gang attempt to capture Buttercup during a big soccer match between the New Townsville Titans and the Cityville Colts.
Fashion Action: Mojo attacks a fashion show that Blossom and Bubbles are participating in.The Way of the Noodle: After a customer puts too much vinegar on the soup, black Z-Rays turns the soup into Noodlehead and forces people to eat noodles 'the right way', but the Powerpuff Girls Z are too full to stop him.
The Powerpuff Girls find out why Princess Morbucks is showing off every night, costing them their sleep.
Picture This: Ernie, the school newspaper's photographer, struggles to take a decent picture of the Powerpuff Girls.Revenge of Digitron: The Mayor's petty argument with his brother, the Principal, causes an electric wave monster to be created.
Mojo Jojo, Fuzzy Lumpkins, and the Gangreen Gang join forces to defeat the Powerpuff Girls.
Practice Makes Pandemonium: A piano hit by black Z-Rays terrorizes the town after being played poorly by Mojo.Ms. Keane to the Rescue: In order to not let their grades slip, Ms. Keane shoots down every excuse the girls have to fight Mojo.
Using the Powerpuff Girls' DNA, his own DNA, along with Chemical Z, Mojo Jojo creates Brick, Boomer, and Butch, the Rowdyruff Boys, but the results are not what he expected!
Quack-Quack Attack: A boy's rubber duck is lost and hit by a black Z-Ray, and Poochi decides to take care of it.Veggie Vengeance: A group of vegetables take all the vegetables into space after no one eats them.
A mysterious being (Him) sends a mummy to collect "white energy" from the Powerpuff Girls to escape from its prison While Mojo and the Powerpuff Girls are fighting for delicious snacks, the PastryPuffs.
A Comedy of Terrors: Him's particles transforms a comedian in a monster. Beetle Battle: With the help of Buttercup, Ken trains his pet beetle to defeat his rival in a beetle fighting tournament. But the opponent beetle gets hit by Him's particles.
In order to introduce him to new friends, Professor Utonium sends his son back to school.
The Write and the Wrong Way: Miyako's pen and eraser are infected by Him's black spores. The pen likes to cause mischief, but the eraser tries to stop him. Flower Power: Him's spores infect a lonely flower, who begins to cover the town in flora.
While the girls try to make Ken's wish true with the existence of Santa, Mojo decides to suck the Santas' into his machine. Including Mr. Mayor.
Attack of the Sushi Monsters: Him's spores infect a sushi-making machine, which creates a menacing group of sushi monsters.Cat On a Hot Tin Poochi: After Princess Morbucks is returned to her normal form, Sapphire stays behind and spends the night with Poochi.
Princess, Sedusa, and Violet from the Amoeba Boys join forces to create havoc in New Townsville and plan to steal the Powerpuff Z's gold statue.
Harmed to the Teeth: Blossom and Mojo go to the dentist after eating too many sweets. Beware the Hair: The girls encounter a Dancing Man when they go on a trip to a disco.
The origins of Him are revealed.