It has been a while since four Nicktoon Heroes united as one to fight against their their villains known as the Syndicate. Then it happen when the heroes are transported to an island where Mawgu seeks vengeance. The group expands and together they defeated the enemy and save their worlds. For a third time, evil reigns over this time Professor Calamitous had use the fairies and ghost energy to create evil toy armies to conquered. The Nicktoons united once more and they move in to stop him. Some of the heroes were captured but they were freed. Now that the Syndicate was defeated, the Multiverse is at peace once again. Or is it?

[Retroville Jimmy's Lab]

Inside his lab, Jimmy Neutron, was researching about a new element. His dog Goddard, is sleeping.

"Hmm. I could figure out how the energies from other worlds could generate enough power to keep the Doomsday Device operated." Jimmy said as he looks at the blue prints of the device. Then all of a sudden, an alarm blares and Jimmy immediately responds.

"Vox, locate the threat." Jimmy said to the computer.

"THREAT LOCATED. OUTSIDE THE HOUSE PERIMETER. TARGET: PROFESSOR CALAMITOUS." Vox informed Jimmy.

"Goddard!" Jimmy called out to his dog who immediately wakes up, "We need the other heroes. Get to the portal and find them and tell them to meet me here pronto."

Goddard barks in reply and heads out to the portal. He jumps through the machine as Jimmy grabs his gear and heads out to combat the threat.

[Cindy's residence]

Meanwhile across the street from Jimmy's place was the home of Cindy Vortex. In her bedroom, the fearless blonde girl was practicing self defense with her best friend, Libby. They still have their powers after the N Men was dismantled. Cindy practices her strength while Libby practices her force-field and invisibility. Libby had learned from Jimmy that her force field is not only for defense but offense as well. Then all of a sudden, the house rumbles and the girls look out and see a giant mech walker before turning to see Jimmy.

"Looks like Calamitous is at it again." Cindy groaned.

"Hey look. Jimmy is out there." Libby said pointing to the large head kid, "You know what we have to do."

"Without Carl or Sheen, the N Men is not complete." Cindy said as she reaches to her lamp and pulls on the levers down. Her wall opens up two doors and it shows two costumes.

"Who needs them." Libby said as she goes to her blue costume and begins putting it on.

"Is only just the three of us." Cindy said as she too puts on her costume.

Meanwhile outside and on the street, Professor Calamitous is in his mech machine heading for Jimmy's lab.

"Where are you, Neutron?! You are going to um... uh.." Calamitous spoke with a lose of words.

"Pay for what you have done?"

The mad doctor looks down and sees Jimmy with his Tornado Blaster in hand.

"Miss me, Calamitous?" Jimmy asked.

"Oh, you little brat! I will make you regret for what you have doen a long time ago when the Syndicate was on the verge of... um... conquering the..."

"Universe?" Jimmy asked,

"Yes! That!" The professor said. "So, Neutron, since your buddies aren't here, it is just you and me, but I would never like to make things fair so I got back up this time." With that coming out of a portal was a humanoid robot with red eyes. In his hand is an electric staff. Also next to him was a female alien with pink eyes. She wears a grey skin tight suit and has helmet. Her hair is blue with pig tails through her helmet. Attach to her back was a sword with a hybrid of plasma and steel. Attach to her hips were two dueling blasters. "Meet my new associates, Cyrus and Roxan."

"As long as I get paid to get the job done." Cyrus said.

"That's it? A kid. This must be a joke right?" Roxan groaned.

"I'll pay you triple if you bring him to me alive." Calamitous said to her.

"Deal." Roxan said as she presses a button and out comes a jet pack suit. She then flies in the air and pulls out her blasters.

"Huh, three verses one?" Jimmy asked, twirling his blaster in the air.

"There is no way you can take us on." Cyrus said as he charges at Jimmy. He flinches before something knocks him to the ground.

Jimmy, Calamitous, and Roxan looks and see Jimmy's friends Cindy and Libby who are in their superhero costumes.

"Argh! Those melding kids again!" Calamitous said. But then he see only three. "Say where is the fat one and they annoying fan one?"

Well, let's say that Carl is on vacation with his parents for a week while Sheen was at the comic con trying to prove the Ultra-Lord was better than either Marvel nor DC.

"They won't be back for awhile. So it is three of us and only three of you." Jimmy said.

"Destroy them!" Calamitous said to Cyrus and Roxan.

[Soundtrack: Man of Steel Dubstep Remix]

The three heroes and the three villains clashed against each other. Professor Calamitous tries to strike with his mech, but due to size, Jimmy outruns his attacks. Jimmy uses the opportunity to fire his tornado blaster at the head causing damage.

"You will pay for that, Neutron." Calamitous said.

"Try and keep up!" Jimmy taunted.

Meanwhile, Cindy dodges the staff from the robotic man. Cindy tries to go in for close combat, but Cyrus keeps on pushing her back. Cindy then sees a street sign and grabs it with her strength. She charges at Cyrus and they clash their weapons against each other.

Elsewhere, Libby keeps on using her force-field to defend herself from blaster fire by Roxan as she shoots her blasters at her. The superhero then forms a shield on her arm and throws it at Roxan. The female bounty hunter didn't have time before the shield hits her in the chest and she gets thrown in a car. She then gets up before smirking.

"You are good, girl. You have been practicing with your combat skills." Roxan said with impressed.

"And you're not bad for a bounty hunter." Libby said with agreement.

The two girls clashed again. The three heroes continue their clashed while Goddard is sent to find help.

[Amity Park]

Meanwhile at Amity Park, the three heroes, Danny, Sam, and Tucker are walking home from school. It has been a while since their last adventure in another world. Their last adventure together was when they were transported to Volcano Island to defeat the evil Mawgu. It is the first day of Summer.

"Man, i can't believe that summer is finally here." Tucker said.

"Yeah but you know it means summer of fear for the ghosts." Sam opposed.

"Yeah. I remembered when Vlad unleashed the ghosts all over the town but we stopped him." Danny said.

Than all of a sudden, a green portal opens and out comes Goddard.

"Hey, look! It's Goddard." Tucker said.

"What's he doing here?" Sam asks.

Then Goddard opens up his screen and it shows a message: Jimmy in trouble! Head to Retroville immediately!"

"Looks like Jimmy's in trouble again." Danny smirked before he transforms into his Ghost Form.

"You're not leaving us this time, Danny." Sam said as she goes into her bag and a green and grey blaster is shown. She wields it before the device begins transforming into the Peeler Suit covering Sam in armor from head to toe.

"Yeah, uh, I'll think I'll sit this one out." Tucker said.

The two warriors rush through the portal with Goddard following them.

[Bikini Bottom]

At the city of Bikini Bottom, at Spongebob's house, the sponge hero and his best friend, Patrick are reading Mermaid Man and Barnacle Boy comics.

"Gee, Patrick, it is been a while since we help the Nicktoons to save the worlds." Spongebob said.

"Yeah, even those toybots who like Krabby Patties." Patrick said.

"I know we should go visit Sandy." Spongebob said.

The two friends head out to their friend's place. At the tree dome, they look and see Sandy practicing her karate. She jumps and kicks a dummy to the ground.

"Hey, Sandy." SPongebob said to her.

"Howdy, Spongebob. Howdy, Patrick," Sandy said before picking up a staff and twirling it around. "What brings you here?"

Just as Spongebob was about to answer, the green portal opens up and out comes Goddard.

"Hey look! It's the robot good with the screen!" Patrick said.

"It's Goddard." Spongebob said as he, Patrick, and Sandy approaches the dog. Then Goddard shows them the SOS message.

"Oh no! Jimmy is in trouble!" Spongebob said. "Come on, guys. We are going to be heroes again!"

"Yeah, I love being heroes!" Patrick said in agreement.

"Time for a good old fashion Texas cage match!" Sandy said as she quickly rushes to her tree house to change. Spongebob manages to armed himself with the bubble pouch and his karate gloves. Patrick prepares himself before Sandy returns. She wears her suit that she used when she and Spongebob were on Karate Island. Spongebob manages to supply the group with some bags of Krabby Patties for the journey.

"Let's go!" Spongebob declared as he, Patrick, and Sandy jumps through the portal with Goddard following.

[Tremorton]

Meanwhile in the city, a figure was thrown on the floor but quickly recovered and on her feet. It is none other than the female robot XJ9: Jenny Wakeman.

"You guys don't known when to quit!" She said to the invaders. The invaders were a band of space raiders. They were mercenaries hired by Queen Vexus. Then one of the raiders gets blown away by a purple flame. Jenny turns and sees none other her friend, Misty.

"You had to make the call." Misty said.

As the tow girls fight, the green portal opens and out comes Goddard. Jenny takes cover behind a car and sees the dog.

"It's Goddard!" She said as her hand form into a crossbow.

"What a nice dog." Misty said as she blasts another raider.

Jenny reads the message and was in shocked, "Misty, Jimmy is in trouble! We got to go to Retroville pronto!"

"Ok! Let me finish up here!" Misty said as she grabs the last raider before throwing him at the dropship before grabbing the vehicle and tosses into space. After she is done she meets up with Jenny and they jump through the portal.

[Dimsdale]

Meanwhile in the city of Dimsdale, the ten year old, buck toothed hero has return from his Crimson Chin comic book adventures.

"Man, what a battle!" Timmy said, "The Bronze Knee Cap, the Iron Lung, and the Golden Gut put us up a good one."

Poofing by him were his Fairy Godparents, Cosmo, Wanda, and Poof who were in their superhero uniform.

"Yeah, Timmy. My bones felt like jello." Cosmo said as he collapses into ground.

"Well the good news is that you and the Crimson Chin managed to save the day." Wanda said to Timmy.

"And not to mention that I got a kiss from the girl that I saved from the Iron Lung." Timmy said as he rubs his cheek.

"Poof poof." Poof said.

Then the green portal opens up and out comes Goddard.

"Hey, it's Goddard!" Timmy said.

"Hey, where's big headed Jimmy?" Cosmo asked.

"Well, boys, Jimmy is in trouble again. You know what to do, sport." Wanda said to Timmy.

"So Neutron needs me, eh? Sure i could help that out." Timmy said.

"Let's go!" Cosmo said.

The four heroes jump to the portal to help Jimmy.

[Miracle City]

In the Mexican City of Miracle, Manny and Frida are walking home from school.

"Man, this will be the best weekend ever!" Manny said.

"You said it, Manny" Frida said.

Then all of a sudden, the green portal opens up and out comes Goddard.

"Hey, is the robot dog!" Frida said.

The two reas the message knowing Jimmy is in trouble.

"Go get them, Manny!" Frida saids before Manny spins his belt and he transforms into EL Tigre. He then runs through the portal before it closes in front of Frida.

"Be careful, Manny." Frida said.

[Retroville]

"Ha ha ha ha ha!" He laughed, "I have finally got you! Now say goodbye!"

Just as he was about to finish Jimmy off, a star strikes a Calamitous and it releases Jimmy. He falls but gets caught. Jimmy looks and sees Goddard.

"Thanks boy!" Jimmy said to his dog who barked in reply.

"You didn't start the party without us, didn't you, Neutron?"

Jimmy turns and sees his allies, Timmy, Spongebob, Patrick, Sandy, Danny, Sam, Jenny, Misty, and Manny who had arrived thanks to Goddard. They have all been gathered at Retroville to help Jimmy.

"You had to make the call didn't you?" Timmy asked him.

"I have to." Jimmy said. Then Cindy and Libby land next to them.

"Hey look! It's his friends, Cindy and Libby!" Spongebob said.

When Cindy turns and sees Timmy who in now as Cleft the Boy Chin Wonder, she blushes madly. Libby sees this before smirking.

"Hi, Cindy!" Timmy said.

"Oh, Timmy! I can't believe you're here again. And you look kinda cute as a superhero." Cindy said which made Timmy blush.

"Aw, young love." Spongebob said.

"Can we please deal with Calamitous and his henchman right now?!" Jimmy asked.

Roxan and Cyrus then appear next to the professor.

"Looks like the kid has brought some friends." Cyrus said.

"That robot girl looks like she could be worth a fortune." Roxan said as she points her blaster at Jenny.

"You will have to do a lot more than that to be me!" Jenny opposed.

"Hey, Spongebob, who's that robot guy?" Patrick asked his best friend.

"I don't know, Patrick, but I beat this guy came from outer space!" Spongebob said.

"Let's get this loco!" Manny said as he transforms into El Tigre.

The heroes charge at the villain before something happened. From inside the mech, the reactor begins overloading. Everyone stop what they were doing before turning to Calamitous.

"What is going on?!" Timmy asked.

"You fools! The core is overloading!" Calamitous informed.

"Brace yourselves!" Jimmy warned before a powerful flash of light consume everyone before fading away. Near them was an old man who saw everything.

"Curses! Aliens are at it again." He said.

Roxan and Cyrus are part of Calamitous' henchman.

Cyrus was once a man before an accident almost cost him his life. He was then rebuilt into a cybernetic death machine before he want rogue. He was decommissioned before getting reprogrammed by Calamtious.

Roxan was a Dexarian Bounty Hunter from the far reaches of space. Having a troubled past, Roxan was an ex military before beging her career hunting down the worst bounties throughtout the galaxy. She shows no fear and sometimes no mercy to her enemies.

I will write more...