Hello everyone, LooneyAces here and I want to say Happy 14th Dannyversary and welcome to the eleventh story of the Danny Phantom/Marvel Cinematic Universe Fanfiction crossover series, better known as DPxMCU. This is the first major DPxMCU Dani Phantom story. I have done a DPxMCU Dani Phantom story before, but that was a crossover with Agents of S.H.I.E.L.D. and was based on a episode instead of a movie. Now, not only this is a DPxMCU story, but this is also a collaboration story with fellow fanfiction author Mikaela2015 and her Phantom Twins Fanfiction series, which she's calling the story in her character's perspectives, The Phantom Twins: World's Collide. If you haven't read any of her Phantom Twins stories, you'll need to read them in the following order to avoid confusion. I'll explain more on what's to come in a later chapter.

The Phantom Twins: Season 1

The Phantom Twins: Season 2

The Phantom Twins: Season 3

The Phantom Twins: Season 4

The Phantom Twins: Senior Year

There is also a one shot series called The Phantom Twins One Shot Series.

Now, in regards to my DPxMCU series, if you're new to the series, you'll need to read these following stories in the series' chronological order before reading this one.

THE FENTON CHRONICLES

GHOSTLY AVENGER.

DANNY PHANTOM: THE ASGARDIAN DRAUGR.

DANI PHANTOM: THE ROGUED DRAUGR.

GHOSTLY GUARDIANS

GHOSTLY GUARDIANS VOL 2

GHOSTLY AVENGER: AGE OF ULTRON

GHOSTLY AVENGER: CIVIL WAR

DANNY PHANTOM: THE ULTIMATE RETURN.

GHOSTLY AVENGERS: RAGNAROK

Disclaimer: I do not own Danny Phantom and its characters. They belong to Butch Hartman, Viacom International and Nickelodeon. I also do not own the Marvel Cinematic Universe and its characters. They belong to Marvel Studios. One Marvel character will appear in this story, but only in one chapter. Danny still wears his 10 Years Later Fenton Glove suit (Butch Hartman's design), which has appeared in the series since TUR. This story will be the debut of Dani's official 10 Years later outfit that Butch Hartman designed. You can see them in the story's cover photo. Mikaela2015's uniform designs for younger Danny and her OC Dayla will also appear on cover photo. Well, without further do, I present you DANI PHANTOM: THE DIMENSIONAL WAR!

Prologue: They Will Return Someday.

It was a cold and snowy January night at Amity Park, Minnesota in the year 1948. Everything would have been peaceful, but a battle was taking place at a street in the town as ecto-blasts was being shot around. A group of agents, who are part of both the ghost hunting organization Fenton Works and the top-secret Allied war agency the Strategic Scientific Reserve, was firing ecto-blasts from their anti-ghost blasters at a group of Harvester ghosts near a house. One hour ago, a large battle took place at the Fenton Ghost Bunker where the leader and founder of Fenton Works and S.S.R. scientist, Harry Fenton, was on a mission to save Ida Greenberg from former Fenton Works assistant Manfred Bauer, who has kidnapped Ida. With help from his fellow friends and S.S.R. operatives Peggy Carter, Howard Stark, Daniel Sousa, Tommy Mitchell, Benjamin Manson and the Howling Commandos, Harry managed to save Ida. However, Manfred handles a ancient, powerful and deadly ghost artifact called the Tetrahedron with his bare hands, causing it to activate and sends him and the remaining Harvester ghosts at the bunker through a ghost portal into a far away dimension in the Ghost Zone. Although Ida has been rescued and Manfred gone, there is still Harvester ghost presence at Amity Park, more specifically at Manfred's house. Harry send several of his Fenton Works or S.S.R. agents to Manfred's house to recover data and plans from Manfred on what he was planning to do on his conquest of Earth, but the agents that were send to investigate became under attack by the Harvesters that were guarding the house. Some agents were hiding behind alleys to avoid the ecto-rays from the Harvesters.

"Where's the boss?!" an Fenton Works/S.S.R. agent asked.

"Mr. Fenton, along with Mr. Mitchell and Mr. Manson, should arrived in a few minutes. They already left Ms. Greenberg with Agent Carter to an S.S.R. outpost to keep her safe until all the Harvesters are destroyed." another agent replied.

The Harvesters continue to fire ecto-energy blasts at the agents until suddenly, a 1946 Plymouth Deluxe car drove through the street at top speed before it ran over the Harvesters, reducing them to ectoplasm. The car came to a stop before the driver came out of the car. It was a young 30 year old man with messy black hair, blue eyes, and wearing a gray business suit with a white collared shirt underneath, a black tie and black business shoes. It was Harry Fenton. Harry immediately grabbed a anti-ghost blaster that was attached with a cord to keep it working. Harry immediately blasted ecto-rays at the Harvesters that were attacking the agents, and destroys them. Another person came out of the back seat of the car. It was also a young 30 year old man who had blue eyes, black hair in a classic military cut, and wearing a brown business suit with a white collared shirt underneath, a black tie, brown pants and black business shoes. It is Harry's friend Benjamin Manson. The agents came out of their hiding spots and approached Harry and Benjamin.

"How many more Harvesters are there?" Harry asked.

"We don't know, sir, but the place is heavily guarded." an agent replied.

"Are there any ghosts that came from inside the house?" Benjamin asked.

"We saw some, but not all. There might more inside." another agent replied.

"Tommy, how many Harvesters is the Fenton Ecto-Signature Analyzer detecting?" Harry asked.

A person on the passenger side of the car walked out. It was a young 22 year old man with brown eyes, brown hair in a classic military cut, wearing a white collar shirt with a gray vest, black tie, gray pants and black business shoes. It is Harry's assistant and trusted friend Tommy Mitchell. Tommy was currently using the Fenton Ecto-Signature Analyzer to detect ecto-signatures from the Harvesters. The clock's arm was pointed not too high.

"Around 10, Harry." Tommy replied.

"All right, not many. We get in there, and we take them out. We have no other choice, we have to gather everything on what Manfred was planning on now that he's gone." Harry said.

"Yes, sir." Tommy said.

"Let's take care of these spooks." Benjamin said.

Harry, Tommy, Benjamin and the other Fenton Works/S.S.R. agents circled around Manfred's house, aiming their anti-ghost blasters. They then barged in the building before they were met by 10 Harvester ghosts. The Harvesters immediately charged towards Harry, Benjamin, Tommy and the agents. Some agents had to take cover while others managed to blast them. One Harvester had swiped Tommy's blaster away from his hand. Tommy then ducked before the Harvester can swipe his face. He then gave a powerful right hook to the Harvester's face before he managed to grabbed his blaster and shot at the evil ghost, destroying it. Benjamin kicked one Harvester away from him before he stabbed the Harvester with a knife that had Blood Blossom liquid, before he blasted another Harvester to ectoplasm. Meanwhile, Harry has blasted one Harvester before he stabs another with a knife that was covered with a liquid from the Blood Blossom. One Harvester then grabbed Harry by the neck before pinning him towards the wall. The Harvester then started to use its telepathic powers to fry Harry's mind. Harry heard a high-pitched sound in his head and then felt an ache forming before he suddenly collapsed to his knees, screaming in pain as the sound increased. As Harry tries to fight the Harvester's telepathy attack, he manage to see visions from the Harvester and saw something horrible. He first saw a ghost woman, who look different from the rest of the Harvesters as she look almost Human, leading the Harvesters on their harvest on Earth and its respective Ghost Zone dimensional plane in a time period that doesn't look like the 1940's, but more like later in the future. He sees the Harvesters slaughtered many people and the ghosts from the Ghost Zone while the ghost woman grins with pure evil. Before Harry can see what happens next, the Harvester that was telepathically frying Harry's mind is blasted to ectoplasm by Tommy, ending the telepathy attack and the short battle. Harry stopped screaming and panted heavily in shock and horror as Tommy and Benjamin immediately ran to check on him.

"Harry, are you all right?" Tommy asked with concern.

"What happen?" Benjamin asked.

"I'm all right. I saw what the Harvesters were planning to do with Earth and the Ghost Zone." Harry said.

A few minutes later, Harry was sitting on the couch and given water and a medication before he started to explain to Tommy and Benjamin what happen.

"What happen?" Benjamin asked.

"The Harvesters have telepathic abilities, and the one that had a hold of me try to fry my brain and kill me, which explains why I was screaming and in so much pain. I then saw a vision from the Harvester. I saw this ghost woman who look different from the rest of the Harvesters as she look almost Human. She had light green skin with glowing pupilless green eyes, very soulless eyes, and dark green lips. She wore a green and red suit that showcases her figure, had red gloves and red boots that went to her thighs, a red and green cape flowed behind her, and a black headdress that was sticking up like horns. I saw another short vision of that ghost woman without the headdress. She had glowing green eyes and very deep green hair that flowed down behind her. I then saw this ghost woman leading the Harvesters on their harvest on Earth and the Ghost Zone. I assume the ghost woman is the Harvester's leader. Interestingly, the time period didn't look like the 1940's, but more like later in the future. I then saw something horrible. I saw the Harvesters slaughtered many people and ghosts while the ghost woman grins with pure evil." Harry explained.

"What happen next?" Tommy asked.

"I don't know 'cause after that, you blasted the Harvester away from me, and saving me in the process. I don't know what happen to Earth if that ghost woman or the Harvesters succeeds, but now I have a very bad feeling about it." Harry replied.

"What do we do?" Tommy asked.

Before Harry can respond, a agent approached the three.

"Sir, you might want to get to the basement. We found something you might want to look at." the agent said.

"All right." Harry said before he faced Tommy and Benjamin. "Let's check it out."

Harry, Tommy and Benjamin then head towards the basement of Manfred's house. As they walked down the stairs, they discover that the room was emitting a ghostly green. When they finally reached the bottom, they discover a device with a glass containment chamber. Inside the glass chamber was bright green ecto-energy that is very familiar to Harry and Tommy.

"What the heck is that?" Benjamin asked.

"Is that harnessed Tetrahedron power?" Tommy asked.

"I believe it is. Looks like the rest of it too." Harry said.

"I'm assuming this device was use to power Manfred's Tetrahedron-powered weapons." Tommy said.

"Dangerous too. You and I have read books on the Tetrahedron and learn more from that friendly nomadic ghost Sojourn. Its true power is unmatched for a Human or a ghost, except for the ghost known as Clockwork. It's more powerful than the two bombs that destroyed Hiroshima and Nagasaki. How much power is in this containment chamber?" Harry said.

Tommy use the Fenton Ecto-Signature Analyzer to see how much Tetrahedron power that is inside the chamber.

"A lot. So much that it can destroy the Ghost Zone in a nuclear explosion that is powerful than the ones in Japan. What should we do with it?" Tommy asked.

"For the Tetrahedron, I'm gonna hide it at a cave I discovered in West Virginia, where no person or ghost won't be able to find it. As for the harnessed power and Manfred's weapons. We're gonna store it in the bunker, at level 20 where only you and myself have access, and now Benjamin." Harry said.

A few minutes later, Harry, Benjamin and Tommy have transported the harnessed Tetrahedron power and Manfred's Tetrahedron-powered weapons to the underground level 20, the lowest level in the Fenton Ghost Bunker.

"So, is there a reason why we're storing a containment chamber that contains powerful, yet deadly ecto-power?" Benjamin asked.

"This power have the potential of good use to us should we have to fight the Harvesters again. We did see how Manfred's weapons kills its victims and it did kill a Harvester when I fought Manfred. We may have defeated them, but I have a feeling that they and their ghost woman leader has a plan for Earth as well as the Ghost Zone and that they will return someday, especially after seeing that horrible vision. The future of both the Earth and the Ghost Zone hangs in the balance. Heck, the future hangs in the balance." Harry replied.

"You think the Harvesters and this ghost woman can be stopped?" Tommy asked.

"I don't know, but I will tell you this, Tommy and Banjamin. If I'm not alive when the time comes and one of you are, you have to tell about this power being stored here to my future kid, or my future kid's kids. The next generation of Fentons will continue to run Fenton Works, that if I get married first someday and actually have a kid or kids." Harry said.

"And what happens if the Harvesters and this ghost woman can't be stopped?" Tommy asked.

"Then God help us." Harry replied.

Harry, Benjamin and Tommy then stores the harnessed Tetrahedron power and Manfred's weapons into a vault and they close it. However, they have no idea that in 70 years, the battle against the Harvesters will end in a very interestingly and dimensional way, and that the harnessed Tetrahedron power will indeed be of good use against the evil hive-minded ghosts and their leader.

And that's the end of the prologue. So this prologue takes place during the events of the DPxMCU story THE FENTON CHRONICLES, more specifically, immediately after the final battle chapter of that story. Nice to see Harry Fenton, Benjamin Manson and Tommy Mitchell again. You know, today also marks the one year anniversary since the successful DPxMCU story DANNY PHANTOM: THE ULTIMATE RETURN was published. Anyway, now, in the next chapter, we will head to the present and see what Team Phantom has been up too since Danny and Dani's intergalactic adventure from the events of Ragnarok. Don't forget, this is DPxMCU story is a collaboration story with Mikaela2015's Phantom Twins series, so be sure to read her story, which is called from her character's perspectives, The Phantom Twins: World's Collide. I hope you all enjoy this story as well as Mikaela2015's. Please review. :)