Author's Note: Hey all! Wow, it sure has been a long time since I last uploaded some stories. You can thank college finals shudder and overall laziness for that. Plus, the fact that I only have Internet access at college and that I choose to write my stories all at once first and then upload them later also contributes to my inept fanfiction duties. I was planning on uploading this story sometime over the Thanksgiving holiday, but never got around to it. To the people who were waiting for a story that never came, I apologize. Anyhow, I was a little surprised that the JTPH 3 did not involve Calamitous getting revenge for what happened to him in the JTPH 2, so I took it upon myself to write a story based on what would happen if a part 4 was made, since the aniamators chose to go in a different direction. Enjoy and please review! Oh, and one more thing, The Fairly Oddparents and Jimmy Neutron are property of Frederator Inc., O Entertainment and DNA Productions respectively, but I you knew that anyway. And now, on with the story!

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Dimmsdale

It was a bright and sunny Friday morning during summer break in the California town of Dimmsdale. Timmy Turner was up in his room with his fairy godparents, Cosmo and Wanda, and he had just told them that he had a surprise in store for them.

"You're giving us the day off?" asked Wanda incredulously.

"Sure," replied Timmy. "With all of the wishing that I've been doing lately, I thought that I should give you guys a break".

"Will you be alright without us for awhile?"

"You bet. I'm planning on asking Chester and AJ to play some baseball with me".

"Hey, good idea Timmy. Hopefully that will make up for you ditching them last time," said Cosmo.

Timmy glared at the green-haired fairy. "They forgave me then before helping me and Jimmy defeat 'Shirley' by bringing him to his senses and not abandoning him, remember? Plus, after the meeting with Chester and AJ, I plan on going to Retroville to see Cindy again".

"How are you going to do that if we're taking the day off?" asked Wanda.

"Not to worry, Wanda. I wish I had a dimensional portal to Retroville!"

Cosmo and Wanda waved their wands and a silver orb appeared on Timmy's wrist. On the middle of the orb sat a pale white dial with Retroville and Dimmsdale settings.

"In order to activate the portal Timmy, just turn the dial to the Retroville setting, and a vortex will open up in front of you. Make sure that if anybody goes into the portal with you that they go first, then you second," explained Wanda. "Otherwise, they will be stuck in that particular world. In order to return to Dimmsdale, just turn the dial to the Dimmsdale setting and another portal will open up".

"Thanks guys. Well, I'm off to go meet Chester and AJ. You two have a great time during your day off. Oh, I almost forgot, do you guys know where my Auto-Poofer is?"

"Well, it should still be stuck in your Game Buddy after Jimmy put it in there to teleport himself back to Retroville before Crocker used it to transport himself, me, Cosmo, and Jimmy to Fairy World before," said Wanda.

"Ooh, ooh, I know where it is!" shouted Cosmo. He then unscrewed the top of his head and pulled out the Game Buddy that still had the Auto-Poofer stuck in it.

"Once again, Cosmo has proved that his empty head can be used for storage," muttered Wanda looking at her husband play a video game on the Game Buddy.

"I'm going to need the Auto-Poofer when you're done with that," said Timmy.

"Here you go," mumbled Cosmo as he pulled the Auto-Poofer out of the Game Buddy without taking his eyes off the screen and gave it to Timmy.

"What do you need it for anyway?" asked Wanda.

"Just in case I need to immediately return to my room for any reason I would want to have it with me". Wanda just shrugged at that comment. "Well, I'm off to go meet Chester and AJ. Have fun you two," said Timmy as he left his room.

"We sure will Timmy. After all, I just made reservations for myself and Wanda at the Fairy World Magic Springs Spa just now," announced Cosmo, who had put down the Game Buddy and now had a laptop computer floating in front of him.

Wanda raised an eyebrow as she flew over to her husband. "How did you manage to get reservations there? That is the most exclusive spa in Fairy World. You have to wait months in advance in order for someone to service you, and even then, they probably throw you out".

"I've got my sources," said Cosmo with a sly smile.

We then cut to Binky Abdul sitting in front of a computer in the reception area of the Fairy World Magic Springs Spa.

"I'm glad that I was able to set up Cosmo and Wanda for a luxurious day at the spa. They deserve a good rest and it sure beats the heck out of the job I had at the Fairy World prison. Jorgen has been on my case ever since I let that short bald man wearing that white lab coat with the weird goggles enter the prison and deactivate the security system, thus letting out all of the Anti-Fairies to have Friday-the-Thirteenth last forever. In order for that guy to deactivate the security system, he would have had to have been from another universe… Boy, what are the chances of that ever happening?"

Retroville

Pretty good, actually. In an equally bright and sunny Friday morning during summer break in Retroville, Jimmy was testing yet another invention with his two best friends Carl and Sheen. As always, Jimmy requests that Carl and Sheen be testers and witnesses to his many inventions whether they are dangerous or not, always saying that their safety is in good hands ;) . During this particular testing day, Carl brought along Professor Calamitous with him, who was shrunk by Jorgen Van Strangle and turned into Jimmy's mother, Judy, by Wanda in the second power hour. Jimmy was initially skeptical about Calamitous' presence, whether he looked liked his mother or not, but with much negotiating, Carl managed to convince Jimmy to let Calamitous be present, just as long as he was kept in his jar.

"Gentlemen, I have invited you here to witness and test my latest invention: a gumball, that when ingested, will allow your body to stretch in an infinite number of directions so as to allow the user to fit into tight spaces with ease. It took some weeks of planning, but I believe that all the bugs were worked out," announced Jimmy. In his outstretched hand sat five colored gumballs.

"Ooh, let me try purple, LET ME TRY PURPLE!!" shouted Sheen.

"Alright, alright… Now Sheen, after you have chewed the gum for several minutes I want you to try to fit into this jar I have here".

While Sheen was busy chewing the purple gumball, Jimmy brought out a jar from behind his back and handed it to him.

"Uh, I don't know Jimmy. Are you sure that all of the bugs have been worked out?" asked a concerned Carl.

"Don't worry Carl. The Neutron Elasticity Gumball has been fully tested prior to Sheen testing it for the first time ;) . Nothing can go wrong".

However, as you might have guessed, things did go wrong. When Sheen finished chewing the gum, he crammed the jar onto his head. Things seemed to be going well until Sheen realized that his head was the only part of his body that was affected by the gum. He looked through the glass at Jimmy and Carl who were giving him weird looks because his head was stuck in a jar that was half the width of his own head.

"Uh Jimmy, I think that you need to do more tests on this gum. My head feels really weird and it's getting a little hard to breathe in here". Sheen's reply was a bit muffled.

"Hang on there Sheen. I have just the solution to this sort of problem. If the pressure on the inside of the jar was somehow reduced, I could take this hammer here…" Jimmy then produced a hammer from behind his back. "…And lightly tap the outside of the jar, thus causing it to harmlessly shatter around your head," explained Jimmy. "Now Sheen, I want you to take a deep breath!"

"What, and risk dying here?! I don't have much air left!"

"Just trust me!"

"Okay!" Sheen then took a deep breath with as much oxygen as he could. When the pressure was reduced within the jar significantly, Jimmy lightly tapped on the outside of it with the hammer. Instantly, the jar shattered to pieces and fell harmlessly to the ground.

"Sheen, are you alright?" asked Carl.

"Yeah, I think I will be once the dizziness wears off," replied Sheen who was lazily spinning in circles.

"I don't understand it. The elastic properties of the gum should have allowed you to fit perfectly inside the jar," mused Jimmy.

"Maybe you have to wait for it to travel throughout your entire body in order for it to fully work," thought Carl.

"Yeah… That would explain why only Sheen's head was affected and not the rest of his body. The gum must need more time in order for it to fully work".

While Jimmy, Carl, and Sheen continued to discuss the Neutron Elasticity Gumball, Professor Calamitous was watching from his respective jar in the grass where Carl had set him down. He began to formulate a plan that would allow him to rule both universes once he managed to escape from his glass prison. He usually didn't have much of a chance at Carl's house, because the round boy always kept a close watch on him at all times, talking to Calamitous like he was some sort of a squirrel, which in fact was another one of Carl's many likes besides llamas of course. Calamitous shuddered when he thought back to when Carl had told him endless stories about his love of squirrels, llamas, and especially when he became the llama king in the second power hour. He thought that he would get the chance to escape once Carl left the house for any reason, but before Carl left he would always lock the door to his room where Calamitous was kept so that no escaping could occur, even though Carl thought that he wouldn't try to escape anyway.

Calamitous wanted desperately to escape this madness, and when he finally did, he was going to get revenge on Jimmy and Buck-Toothed Boy, (Timmy), by stealing Timmy's flying helpers and using their powers at his disposal. With unlimited power, like what he had with Jorgen in the second power hour, he planned to destroy Jimmy and Timmy and take over both Retroville and Dimmsdale.

"Now if I could only find a way out of this blasted jar".

Calamitous looked around for anything that might help him with the task at hand and instantly his eyes fell on the door to Jimmy's lab that was left slightly ajar.

"How fortunate. I can enter Jimmy's lab unnoticed and gather some useful gadgets and inventions that will allow me to take over both universes".

With some effort, he managed to tip the jar onto its side and began to roll it towards the open door like a hamster running on an exercise wheel.

"At least with this new look I can gain twice the distance than I could in my old body". (Remember, he still looks like Jimmy's mom). Jimmy, Carl, and Sheen had their backs to Calamitous so he had no trouble in getting to the open clubhouse door leading to Jimmy's lab without having to worry about being detected. However, the tunnel slide leading to the main part of the lab was not what Calamitous had hoped for. He went tumbling around in his jar all the way down until centrifugal force kept him pinned to the sides.

"Now I know what it feels like to be socks in a clothes dryer…"

When he finally reached the main part of the lab, the jar rolled right into the opposite wall and shattered to pieces. Dazed, but otherwise unharmed, Calamitous slowly stood up as the room spun wildly around him.

"Ooh, I never should have eaten the spaghetti that Carl kid gave to me. I'm used to eating spaghetti with all kinds of seasonings to cleanse my palate, but his family doesn't put anything on it! Something about them having too many allergies…"

As soon as Calamitous gained his composure, he gazed up at the shelves that had all kinds of gadgets and inventions on them.

"First things first," he muttered. "Now where is it…? Ah, here it is!"

He had stumbled across Jimmy's shrink ray that was laying on the floor. Figuring that he must somehow activate it using a heavy object, he pushed it with great difficulty towards a cloth-covered table that had some other gadgets on it. Before he got into position, he turned the dial on the shrink ray to enlarge and then began to tug on the cloth covering the table. Jimmy's hypercube was one of the gadgets up on the table and it slowly slid towards the edge. All at once, it fell onto the button that operated the shrink ray, and immediately Calamitous felt a tingling sensation all over his body as he returned to normal size. When it was over, he bent down and picked up the hypercube.

"Jimmy's hypercube could prove to be invaluable as it will store all of the necessary gadgets and inventions I'll need in order to make my plans a reality. Or at least until I capture Buck-Toothed Boy's flying helpers". He then put the shrink ray into the hypercube along with a few mini lasers and some other miscellaneous gadgets. "Since I still look like Jimmy's mother I'll use her cover as my disguise until I'm safely in Dimmsdale".

Once Calamitous was satisfied with everything he gathered, he got ready to leave for Dimmsdale, until he remembered that he witnessed all of the Anti-Fairies in the second power hour get sucked into the hypercube by a giant butterfly net. With a little rummaging around the lab, he managed to come across a butterfly net in fairly good condition standing up against one of the walls. He then held it above his head as he laughed evilly and triumphantly.

Cut to Opening Credits

A stage is set with a stool and a microphone. Suddenly, a bright spotlight shines down on the stool and Timmy Turner's hand comes into view setting a boom box onto it. He then presses a button on the boom box, and the beginning of the Fairly Oddparents theme song plays.

Timmy is an average kid; that no one understands…

Suddenly, the boom box explodes as a beam of energy hits it and a robotic hand carrying a larger boom box sets it down onto the stool. It then presses a button and the beginning of the Jimmy Neutron theme song plays.

Into the stars; fueled by candy bars; rides a kid with a knack for invention…

The boom box then turns into a frog which croaks and hops off of the stool. Now a different boom box appears on it and the last verse of the Fairly Oddparents theme song plays.

It flips your lid when you are the kid with fairly odd…

The verse is interrupted as a larger boom box comes slamming down on top of this one and continues to play the Jimmy Neutron theme song.

With a super-powered mind; a mechanical K-9…

This boom box then gets turned into a small pig that oinks after Goddard barks twice. We then cut to backstage where Timmy Turner emerges from behind a curtain holding a glowing wand. Jimmy Neutron then emerges through a stage door holding a laser-firing device. Just as Timmy fires his wand at an unseen backdrop, Jimmy follows suit with his laser and both bolts of energy collide on the backdrop which now reads "The Jimmy Timmy Power Hour 4". Timmy and Jimmy then face each other scowling before the backdrop falls on top of them revealing Cosmo and Wanda riding Goddard who turns his head to the camera before flying off.

We then cut to a frame that shows half of Dimmsdale fused together with half of Retroville with Calamitous in the middle in 3-D form grinning evilly at Jimmy and Timmy who are looking panic-stricken at him and the situation around him. At the top of the frame in big bold black letters are the words "Calamitous' Revenge". On his left stands Vicky and on his right stands Crocker who both have sinister smiles on their faces while looking down at Jimmy and Timmy.