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PJ Masks: Sibling Power-Up

Summary:

As the heroes are all introduced to Connor’s big sister, a masked leopard steps into the city and challenges Catboy into a duel. However, Romeo has other plans.

Notes:

Hello! Screenie here. I had the idea of maing this fanmade episode back in March 2025, all while working on Big Hero 6: The Revived series and Akademi, which I won't be touching for now thanks to burnouts. I also thought of releasing this for the show's tenth anniversary on September 18, so here I am. Here we go!

Chapter 1: Act 1: The Rebel of Two Cats

Summary:

The PJ Masks are challenged into a battle against Bad Girls United, a villainous group formed by Luna Girl, Octobella, and a new villain named Silent Cat.

Chapter Text

One night, the PJ Masks was driving around in the Cat-Car 

“That's one mission completed for the night.” Owlette said, “Right guys?”

“Yes! And with that, we could have a sleepover,” Gekko replied, “..free of villainy.”

As for Catboy, he gets an idea.

“Hey guys, remember how I told you two about my sister moving here?” Catboy asked his friends.

The friends nodded in response.

“Well, she is moving here by morning.” Catboy then said, “I’d say we invite her.”

“Brilliant!” Gekko exclaimed.

“Here we go!” Owlette then exclaimed.

 

All of a sudden, a kid, who seems to be wearing a black suit with white details, got in the heroes’ way. The kid’s suit was very similar to Catboy’s.

“Catboy, watch out!” Owlette exclaimed.

 

Catboy pressed on the brakes, bringing the Cat-Car to a halt. However, the kid reacted by looking at them in dismay. She then pretended to fall, getting Luna Girl and Octobella’s attention.

“Silent Cat!” Luna exclaimed as she and Octobella rushed over to Silent Cat, “What happened?”

Silent Cat stood up from the ground just as the PJ Masks got out of the Cat-Car.

“I’m sorry-” Catboy tried to apologize.

“NONSENSE!” Silent Cat exclaimed, “These three PJ Pests you two were talking about started this!”

Octobella looked at the PJ Masks, especially Gekko, in disgust.

“They hit me with their good looking car!” Silent Cat argued.

“What? Hit you?” Catboy was shocked, “Look, you ran into our way, that’s why I had to stop-”

 

However, the three villains didn’t believe him.

“Kitty Cat, look at what you’ve done!” Luna argued at Catboy.

“Even more, you COPIED MY SUIT!” Silent Cat added.

“What do you mean?” Catboy asked, “I got this suit because of my amulet.”

“Oh, so you got one too..” Silent Cat muttered, “Well then, let me show you who’s the real cat!”

Silent Cat lets out a hiss, looking at Catboy.

“Oh you see, Silent Copycat.” Catboy said to Silent Cat.

“Y’know what, let’s call it a day.” Luna said, “But PJ Pests, be ready tomorrow.”

The PJ Masks were left confused.

“About what?” Owlette asked.

“For a Heroes versus Villains battle.” Luna replied.

“We’re in!” Gekko exclaimed.

“Cause you three are no match for us, PJ Masks.” Catboy then said to the girls.

“Or us, Bad Girls United!” Octobella exclaimed.

 

Once morning came, Connor, Amaya, and Greg tells Ivan and Newton about what happened last night.

“Okay, so we were driving in the Cat-Car, then all of a sudden, three villains appeared in our sight.” Amaya said.

“I did stop the Cat-Car, but Silent Cat accused me of hitting her!” Connor added, “Even more, she accused me of copying me!”

“So that’s why you came to the Power-Q much later than us..” Ivan muttered.

“Yup. And they challenged us into a battle.” Greg then said, “It takes place tomorrow, which means no sleepover for us then.”

 

As the group approached Connor’s house, they were met with brown-haired hair. Her skin tone is the same as Connor, but much lighter. She is also wearing a yellow shirt with a blue bow.

“Max!” Connor exclaimed to the girl, “I knew you would be waiting for me!”

Connor ran up to the girl and gave her a hug. Just then, Max’s eyes turned to Connor’s friends, who were staring.

“So these are your best friends..?” Max asked.

“Yup. As for you guys, meet my sister, Maxine!” Connor then said to his best friends, “Max, my friends, fresh from school.”

 

Max rushed to her brother’s four friends, saying,

“Hey guys! Name Is Maxine! You could call me Max. Nice to meet you!”

Amaya spoke up and said,

“Hey Max! Nice to meet-”

“Tell me, are you interested in choir?” Max asked, “I’m a member there.”

“Kind of.” Amaya replied.

“Actually, I’m interested in music.” Ivan then said to Max.

 

As for Connor, he looked at his handheld mirror. He knows how he feels about Silent Cat getting into his way, so he tells himself,

“Don’t worry, cause I know this battle will be easy. Silent Cat is no match for me.”

Moments later, Max enters the house while Connor regroups with the others.

“Are you guys ready for the fight?” Newton asked.

“Yup.” Greg replied, “Going to give Octobella some payback for stealing Lionel from me!”

“Same with me.” Connor added.

“And we’re set.” Amaya then said, “PJ Masks, we’re on our way!”

“Into the night-”

“To get back at Silent Cat!” Connor interrupted, “For copying me, and to save the day!”

 

TRANSFORMATION SEQUENCE

 

After transforming, the heroes met up in the Power Q, ready for what’s going to happen.

“Let’s go!” Catboy exclaimed.

As for An Yu and Lilyfay, they were very uncertain about what was going to happen.

“Wait guys.” An Yu asked, “Are you sure this is a good idea?”

“Huh?”

“When you first got back at the Speedy Twins, you nearly got lost in space!” Lilyfay argued, “And now you’re getting back because of some cat who tried to copy you?”

“I know it’s dangerous.” Catboy then said.

“Then why are you attempting it?” An Yu then asked.

While Catboy didn’t know what to answer, Owlette spoke up for him and said,

“Luna Girl and Octobella challenged us for today.”

“They told us about it last night, before getting home.” Gekko added.

“Enough arguing!” Catboy exclaimed, “We have to go!”

However, Bastet held onto Catboy.

“You’re not going,” She said to him, “..without us.”

“Yeah! We’ll join ya!” Lilyfay said.

“Just to keep you safe.” Newton added.

PJ Robot chimed in and insisted that he will go with the heroes as well.

“Well, it looks like PJ Robot is tagging along.” Ice Cub then said.

PJ Robot cheered as he followed the rest of the PJs.

 

In the park, the “Bad Girls United” were hiding behind a bush, with Silent Cat pacing around.

“Ugh! 

“What’s with the pacing?” Luna complained.

“What if those PJ Pests win?” Silent Cat panicked, “What if Copycat completely takes my look as his own? Oh I WON’T LET THIS HAPPEN!”

“Trust us, SC, you’re not the only one roped into this battle.” Octobella reassured, “You have us.”

 

Just then the sound of a roaring engine came by, indicating the PJs’ arrival. Gekko, Newton and Ice Cub exits the Gekko-Mobile. Owlette, An Yu and Lilyfay exit the Owl-Glider. While Catboy and Bastet exit the Cat-Car.

“We are the PJ Masks, ready for the win!”

The Bad Girls United exited the bush altogether.

 

As the fight started, Romeo was watching from his flying factory, grinning.

“Ah yes, the PJ Pests and them being distracted.” He muttered, “Now, time to carry out my ULTIMATE plan!”

Turns out, Romeo has persuaded the Bad Girls United into distracting the heroes.

“What is the plan?” Romeo looked at Robot, who was sitting in a folding chair. “Oh yes! Drain the power of some of the heroes’ crystals!”

“Does it include Moon Crystals and Pondweed?” Robot asked.

“No- Wait! Robot, for the first time,” Romeo walked up to Robot, “..you’re a GENIUS!”

“I am..?” Robot muttered, “Yes yes yes!”

“We will drain, not just the power crystals,” Romeo said, “..but these two!”

“But what about Kitty Cat’s Copycat?” Robot asked.

“I don’t really know what source she uses.” Romeo replied, “But for sure, we will find it.”

 

On the PJ’s end, Gekko manages to avoid every tornado Octobella throws towards him.

“Ha! Missed!” Gekko said to Octobella, who ends up throwing a tornado at Luna Girl.

“Hey! Watch it!” Luna exclaimed.

Luna was chasing Owlette, who then unleashed a feather nest towards her, trapping Luna.

“Hey!”

 

Meanwhile, Catboy uses his furballs at Silent Cat, causing her to fall over. As he was about to use his Cat-Stripes to trap Silent Cat, Catboy is hit by Luna, who uses the feather nest to ram herself towards him.

Silent Cat uses it as an opportunity to put Catboy into sleep, shocking PJ Robot and the other heroes!

“So glad we’re here to help!” Ice Cub then exclaimed.

PJ Robot then flew into the battlefield and carried Catboy into the vehicles, where the others were watching.

“Don’t worry. We’ll wake you up.” Bastet said to Catboy, “Sun Disc!”

However, her expression changed when she noticed her disc not coming out.

“Wait, let me try it again.” She said, “Sun Disc!”

Nothing was working.

“Don’t worry. I got this.” Lilyfay then volunteered, walking up to Catboy. “Starlight Power!”

That zing woke Catboy up.

“Oh my gosh!” Newton was shocked, “It worked! Sorry for doubting you.”

“It’s okay.” Lilyfay replied.

 

As for the other two members, Gekko uses his camouflage, confusing Octobella.

“Ha? Where are you?!” Octobella called out.

All of a sudden, the Luna-Magnet falls off from Luna’s hands, much to her dismay.

“Hey! Give it back!” Luna exclaimed.

But it was too late, as Gekko threw the magnet towards Owlette, who then used it to trap Octobella. Owlette also uses her feather nest to trap Silent Cat.

“PJ Masks for the win!” Owlette and Gekko exclaimed.

“Yes!” The others cheered.

“They did it!” Catboy was glad.

The two other members rushed into their teammates, happy about their victory. Owlette decides to release both Luna and Octobella from their traps, while Silent Cat utilizes her claws to break free from her cage.

“The next time you see us, we’ll win!” Octobella shouted, “You’ll see!”

 

“Well, what a night.” Owlette spoke up, only for her glance to turn to Bastet.

“I don’t know what’s wrong with me.” Bastet said, “I feel like my powers are fading.”

All of a sudden, a beam of light came from An Yu’s staff.

“My staff!” An Yu exclaimed, “No!”

“Now that’s happening..” Gekko muttered.

 

“Guys! I know you hate us by now,” Octobella came up to the heroes, “..but-”

“NONSENSE!” Catboy shouted.

“Catboy, that’s not nice.” Newton said to him.

“Newton’s right-” An Yu was about to speak up.

“I don’t care. We need to find the cause of some of our powers fading away.” Catboy argued.

“Well, you’re not the only one.” Octobella spoke up, “Romeo went into the moat and got his hands on my pondweed!” Octobella explained, “It is the only source of my power!”

The heroes were shocked.

“No wonder I couldn’t summon my Sun Disc!” Bastet exclaimed.

 

On Romeo’s end, he exits Ice World, with the Ice Crystal on his hand, excited.

“That’s three PJ Pests, five more to go.” He muttered, “Maybe I should get to space to take Star Kid’s-”

However, Armadylan jumps in front of him.

“Hey you!” He said to Romeo, “I heard you distracted the PJ Masks and those three villains into fighting with each other.”

“Oh, really? Distract them just to give myself some time to take all their powers?” Romeo muttered.

“Whatever you’re doing with it, it won’t work-” 

However, Armadylan felt his powers getting weak. He also transforms back into his civilian identity, a fair-skinned kid with a side-swept fringe.

“Oh look! My flybots have finished their thing.” Romeo said, “Taking your crystal from the tunnel!”

“I might get it back,” Dylan stood up from the ground, “But I would need some help.”

“Help? By now, the PJ’s are out of power.” Romeo mocked, “Oopsie..”

As Romeo made his leave, Dylan curled up into a ball.

 

As for the heroes, they were driving in the PJ Vehicles when Ice Cub, who was in Gekko-Mobile, suddenly felt something.

“What’s happening?!” He exclaimed.

All of a sudden, he transforms back into his civilian identity.

“Oh no! I lost it!” Ivan exclaimed, “I lost my powers!”

“You’re not the only one.”

Lilyfay, who was inside the Owl-Glider, looked at her chest.

“I’m losing my zing!” Lilyfay was very worried.

“With Romeo sending his flybots to every place where our powers are at,” Newton said, “..in no time, we will be powerless.”

“I have a feeling he’s going to take our Power Q as well.” An Yu then added, “It has the PJ Crystal, right?”

The original trio then nodded.

“Don’t worry, cause I know where we could go.” Catboy reassured his team.

 

In no time, the PJ Masks’ old headquarters came into their view.

“I’m glad no one opted to take it down..” Gekko muttered, “We’d barely use it since getting a new one in space.”

“So that used to be yours..” Lilyfay muttered.

“Yup. And if the Power Q ends up in a villain’s hands,” Catboy said to the team, “..then we know where to go.”