Disclaimer: I do not own Danny Phantom, Urusei Yatsura or any of the characters used here. Danny Phantom is the property of Butch Hartman, Nickelodeon and Viacom International. Urusei Yatsura is the property of Rumiko Takahashi. I also do not own any of the characters utilized in this crossover, they all belong to their respective owners.

Those Obnoxious Ghosts

Chapter 1: The Invaders Arrive

It was a seemingly typical evening in the not-so typical town of Amity Park.

This town may seem like the average town...however, one thing has plagued its people for months… and that is ghosts.

Yes, ghosts, spiritual beings that cause trouble almost every day and this town has a protector named Danny Phantom, who has sworn to protect his home from these very beasts.

What only a small amount of people know is that this ghost is actually a human who has been infused with powerful ectoplasm in a lab accident, allowing him to turn into a ghostly superhero. His real name is Danny Fenton, a seemingly normal human boy who also happens to be the son of the town's own eccentric ghost hunting family and a seemingly unremarkable boy to his peers at Casper High.

Since the incident, Danny has used his powers to act as the city's protector from all sorts of other threats.

However, those threats were mostly just ghosts, spirits and deranged humans who cause all sorts of harm. Each time, he's found a way to come out on top and he knew what to expect from his ghostly foes by now, to the point that it was becoming routine to him.

He's never dealt with anything or anyone who he couldn't blast, freeze, overshadow or trap inside his thermos…but that is about to change.

With Danny

The ghost boy was in a rare moment of joy as he got into his pajamas.

Just last night, Danny saved someone he cared for, a little girl cloned from his DNA named Danielle. She was a surrogate little sister and he'd never let any harm befall her.

Anyway, after making sure that a certain fruitloop couldn't harm her, she had left to parts unknown but he knew that the further away she was from his arch-enemy, the safer she would be.

"I hope she's okay, wherever she is..."He thought, taking a deep breath and smiling.

Danny was in a good mood from that, ready for bed after he helped his father out of the large container that he kept the ghosts in. He felt like he could handle anything.

"There's nothing on Earth I can't handle..."He thought, just happy to put the incident behind him.

He didn't realize how overconfident he was being...or that fate would soon take his words literally.

Meanwhile

Reaching near Earth's moon is something… very unexpected.

It's some kind of spaceship. A very large, metallic spaceship that had what looked to be a tiger striped design.

Inside it was beings who looked human, but had inhuman green hair and horns.

"Is this where we will find the one?..."The ship's leader asked, pointing at the screen.

"Yes, sir. We believe we have found the most ideal lifeform possible..."A subordinate said as he piloted the ship.

And it has set its sights on Amity Park.

The Next Day

It was late in the afternoon and our favorite ghost boy was in the sky right now.

"Man, what a night…" Danny muttered as he flew across the town.

Today has been packed.

First he had to deal with Skulker and his latest attempt to make a pelt out of him, Lancer gave a pop quiz, which he will be lucky if he got a C- at the most, Dash stuffed him in his locker again, then the Lunch Lady attacked an all vegetarian restaurant, a ghostly wolf attacked a butcher shop and also he had to deal with the Box Ghost for the 12th time this week, and it's only TUESDAY!

Anyway, it''s been a long day, so he was eager to just get home, finish the last of his homework and then call it a night.

However, fate rarely ever makes things easy for this young, half ghost hero, it seems.

Suddenly, his ghost sense activated once more and he sighed in annoyance.

"Darn it, is this day ever going to calm down?..."Danny muttered in annoyance as he then saw what cause it.

It was an ectopus that was in the forest, swirling around and acting like a typical, generic, non sentient ghost. Danny flew down, pulled out his thermos and sucked it inside of it.

"There...anything else?..."Danny muttered sarcastically to himself.

Seeing nothing, he flew away, landed in his neighborhood, changed back into his ghostly form and soon started heading in the direction of his house.

Unknown to him, someone was spying on him…and it's NOT a ghost.

"There he is, Daniel James Fenton, sir..." An unknown man said as he looked at his spying device.

"16 years old, American, unimpressive, it fits our description of him…." He continued.

"All tight…do it!..." Another man ordered.

Suddenly the limousine drove fast, stopped right in front of a surprised Danny, who was suddenly forced inside by a large man, despite his protests. Soon the limo drove off and Danny was being held against his will by the large man, who won't let him go.

"HEY! WHAT ARE YOU DOING?!..."Danny shouted as he soon found himself being abducted.

At first he thought this might be Vlad's doing, however, he noticed that these guys don't seem to be ghosts since they didn't trigger his ghost sense.

"What's going on here? Who are you guys?!..." Danny demanded, deciding to hold back his ghost powers until he had no choice here.

He then noticed a lot of military jeeps, helicopters and a bunch of other stuff were also heading in this direction and Danny blinked.

"What's going on here?..." Danny asked, totally lost right now.

Suddenly the limo did a sharp stop, and since Danny didn't have his seat belt on, he jerked forward and fell to the ground.

"Get out...We made it to your house…" The old man, who is clearly the boss, said suddenly.

Danny groaned, then sent them a nasty look.

"Geez, just what is going on here?..." Danny demanded but got no answer.

"You'll find out soon enough..." The man said.

Back in space

The UFO stops behind the moon. Inside, a large figure looks at the monitor and sees Amity Park's hero being escorted out of a limousine.

"It this the one who has been selected. He seems easy enough..." He speaks out to a figure in the room nearby.

"Are you ready?..."He asked.

"Yes, Father!..." A perky female voice called out.

"Perfect… we'll be making our introduction soon..."He said, getting ready for the next step.

Inside Fenton Works

"So, what's this about?..." Danny asked.

These men are in his living room, with his parents and sister equally as confused. Sam is annoyed with the presence of Government agents while Tucker just admires their snazzy outfits.

"Why are you in our home?!..." Maddie asked, not pleased by these strangers.

"I take it you know what an alien is?..." The lead man in black said.

"Well… yeah..." Danny said, questioning why this man is asking the obvious.

"What would you say if I told you that you will be facing off against an alien?..."He added.

All of the Fentons just stare.

"I'm sorry, what?..." Jack spoke up, wondering if this is some sort of joke.

In that instant… a bolt of lightning struck outside. After it ended, a knock on the door is heard. A very, VERY loud knock.

"May I come in?..." A deep male voice called out.

The Fentons and their usual guests stare in confusion.

"I believe, since it's your house, that it's for you..." The man said.

Reluctantly, Danny walked to the door and opened it.

What he saw was more than surprising.

He was a large hulking figure of a man, that was even bigger than his dad. He saw black hair with horns, evil looking eyes and a fanged smile.

"What the-..."Danny thought as he eyed the strange being who entered his home.

He was big , he was tall and he looked menacing...

"Hello there, I am Mr. Invader..." The creature said with an oddly friendly tone.

-To Be Continued

Next Time on Those Obnoxious Ghosts

Meeting the notorious Lum

A/N (1): Hi everyone. Here is the first chapter of the Those Obnoxious Ghosts rewrite. I plan to make some small edits to the story and then continue it. One of the changes is that I am changing Danny's age to 16, since a lot of people think that's how old he was when the series ended, given that he experienced 2 summer vacations.

A/N(2): Special thanks to NeoMark for helping out and for letting me continue this fic. You rock! :)

:) I hope you enjoyed this! Remember to read and review :)