Chapter 1: Tracking Inviso-Bill

I do not own Danny Phantom, Spongebob Squarepants, Jimmy Neutron, or Fairly Oddparents.

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Danny Fenton was at the Nasty Burger, a popular Casper High hangout for teens with his best friends Tucker and Sam. He looked over at the counter at Valerie and sighed.

"Danny, will you please give it up, she only likes you as a friend, she told you that herself." Sam said, trying to sound casual, but Tucker could sense jealousy in her voice and smirked. Danny sighed again and looked at Sam,

"Yeah, I know, but I just can't help it." His ghost sense went off, "Oh no." He looked out the window, and saw Vlad Plasmius, he ran outside. Vlad wasn't heading toward him; he just whirled his cape around and disappeared in a flash of light. "Well, at least I didn't have to waste time going ghost, but I wonder why Vlad just left like that, usually he would make a crack on my dad or try and find my mom to flirt with her."

"I don't know, but I think that might explain things." Sam said pointing at a letter that Vlad had dropped, Danny picked it up and looked at it curiously then gasped.

"What is it, what does it say?" Tucker said, grabbing it out of his hands and Sam looked over his shoulder, the letter read:

HelloVlad plasmius, you may not know who I am, but if you accept this offer, I guarantee, that you will. My name is Professor Finnbar Calamitous and I have an excellent offer for you. Join me along with Denzel Crocker, and Sheldon Plankton and I promise that you will have untold fortune, and be ruler of your dimension. All you have to do is come to my lair at Almostretroville, just east of Retroville, you will not be sorry. I have also included directions in another letter following this one. I hope to see you at my lair soon, try to come,

Prof. Finnbar Calamitous

"This is why Vlad left, I better find out more about this Calamitous guy, and whoever Crocker and Plankton are, I really don't know if I want to know." Sam looked concerned,

"Danny, you'd better be careful about this, four evil wackjob villains, doesn't exactly mean anything good."

"Tell me about it." Danny said nervously.

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Timmy Turner was walking home from school with wood chips embedded in his skull, a black eye, and missing a tooth. Two dogs, one green and one pink were following him home and were looking at him in a concerned, and slightly confused way.

"Timmy, are you sure that you're okay?" The pink 'dog' Wanda asked him.

"Yeah, usually you look a lot better than that, but right now, you look like a big bruise." The green 'dog' Cosmo said happily. Timmy sighed sadly and concernedly.

"No guys, Crocker hasn't been in school for days and I'm starting to get freaked out a little, 'cause I think he's up to something, and I don't know what." His watch beeped three times, the watch that Cosmo and Wanda poofed up for him to communicate with Jimmy Neutron, a nerd that lived in Retroville. He pressed a button and there appeared Jimmy on a tiny screen.

"Timmy Turner, come in Timmy Turner. It's Jimmy Neutron, do you read me?" Jimmy asked him urgently.

"Yeah Jimmy, but why do you wanna talk so bad? Whazza matter?"

"Okay Turner, I'll make this quick, CrockerisinRetrovillewithCalamitousandsoaretwoothervillansfromotherdimensions." Jimmy said quickly.

"That was a mouthful." Said Timmy jokingly.

"Yeah well, I need your help. Are you with me?" Jimmy asked pleadingly. Timmy sighed and nodded his head then ran home, told his parents he was staying at Chester's house for a week, or 2…or 3 then poofed to Retroville.

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Spongebob Squarepants was flipping patties at Bikini Bottom's most famous fast-food restaurant, the Krusty Krab. And was whistling happily as Squidward was reading a Dance Today magazine. Patrick appeared in the back window.

"Hey Spongebob, can you gimme a Krabby Patty?" Patrick asked hopefully.

"Sure Pat, do you have money?" Spongebob asked.

"Uhhh… I think." Patrick dug around in his pockets, only to pull out a button, paper clip, and a piece of lint. "How's this?" he asked.

"Perfect! Mr. Krabs needs a button! His pants are always unbuttoning! One Krabby Patty comin' up!" Spongebob said, and flipped a patty. But all of a sudden, a tingling came down his spine and he jumped up screaming. Then he got teleported all the way to Retroville, along the way; he got lungs, and breathed in fresh air. He saw a tall-haired kid.

"Greetings Spongebob, take some gillgum, it turns air into water as it enters your gills, it's a new program, anyway, I've been expecting you." Jimmy Neutron said to him, and Spongebob smiled and looked around happily.

"Ooh, I can't wait to explore this place!" Spongebob said, smiling.

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Jimmy Neutron was still expecting one hero. The ghost kid Danny Phantom, was a super ghost-powered phantom ghost-fighter. Otherwise known as 'Inviso-Bill' Jimmy had traced him to Amity Park, but it was extremely hard to find him, he was always fighting ghosts, Jimmy often wondered his motive. He sighed and used his tracking device.

"Danny Phantom, track now." His tracker beeped and flashed and went dead. Jimmy groaned, still no sign of ghost kid. He turned to the other two, it was very late, and they both appeared very tired. Timmy looked down at his green backpack on the floor and pink wristwatch lying on top of it. Timmy's eyes were droopy, he yawned widely and Spongebob was investigating his lab.

"What does this do?" Spongebob asked pointing toward a button and then pressed it. A computer began speaking.

Extensive tracking of Danny Phantom activated… subject found. Danny Phantom was shown onscreen flying over a city, apparently blowing off steam from a long day. Danny sighed and hovered in the air for a moment, enjoying the cool breeze.

"Bingo, we've got him, thanks Spongebob." Jimmy said.

"Um…no problem?" Spongebob replied.

Okay, I know, not funny enough, but it will be once Danny arrives, Spongebob will turn into an annoying hyperactive sponge that acts like a four year old, Timmy will turn into an ignorant brat, Jimmy will be an annoying know-it-all, and poor Danny will be stuck to deal with it all, can he band them together…stay tuned!