Author Notes: The Ultimate Dissidia Crossover. Rumors flying about Dissidia: Kingdom Hearts, watching too much Dead Fantasy, led to this. Just in time for Christmas!

…

Prologue – Union of Evil

Location: Unknown

In an unknown dimension, a gathering took place in the form of Hojo, Sephiroth, Ultimecia, Jecht, Jiht, Maleficent, Xehanort's Heartless, Xemnas, Master Xehanort, and his apprentice, Vanitas.

"They're late." muttered Ultimecia.

"Don't be impatient. It's to be expected." Xemnas calmly reassured her.

"They're here." said Sephiroth.

Walking towards them were Victor Donovan, Raidou, Tengu, OMEGA, Genshin, Elizébet, and Doku.

"Excellent." said Hojo, "Everyone's here."

They gathered around a table that materialized in front of them.

"So…" Elizébet started, "What is this about?"

"As you all know, both of our worlds fused in an unknown fashion." said Donovan, "But our problems still persist with those that get in our way."

"Such as?" asked a bored Jecht.

"Your son's girlfriend and her team of Sphere Hunters." mocked Genshin.

"Oh yeah?" asked Vanitas, "Then how about that ninja known as Ayane?"

"Enough." interrupted Maleficent, "There all problems as far as I'm concerned."

"That is why me and Professor Hojo agreed that we band together to combat their problems."

"And just how are we supposed to do that?" snapped Elizébet.

"Divide and conquer."

The group turned to find The Dark Dragon, and riding him was the God of Discord, Chaos.

…

Location: Twilight Train

"Namine! What are you doing?!" Kairi wailed, trying to get away.

"Oh loosen up Kairi. It's Christmas." said Olette, "Have some holiday cheer."

"Not under the mistletoe with Namine I won't!" Kairi said as Namine attempted to kiss her.

"Oh stop it Kairi." said Olette, "You two are so in love. Yet almost one-sided. She's part of you because she's your Nobody."

"Tell me something I don't know!" she snapped.

Namine stopped and asked, "Is it bad to do something like this?"

"No, but- mmph!"

"Get a room you two."

Aqua and Xion arrived on the train via Gummi Ship.

"Where were you two? It's a nightmare in here." Olette grumbled, pointing at a kissing Kairi and Namine.

"Visiting the 7th Heaven Bar, but the other weren't there." reported Xion.

"Huh?"

"Not to mention something we've been invited to something." Aqua added as she put to the control room, "We're heading there now."

…

Location: DOATEC Helicopter Pad (Nighttime)

Hitomi flew though the stormy air and manage to grab onto the ledge to prevent her from falling to her death. On the other end, Tifa was panting heavily and bleeding as her friends, Yuna and Rinoa came to her aid.

"Enough you two!" shouted Yuna, "This is getting stupid!"

"What are you two fighting for anyway?" asked Rinoa, healing Tifa.

"Don't ask me." panted Tifa, "She started it. I didn't do anything."

Hitomi pulled herself up and looked ready to fight again but-

"Enough, Hitomi-san."

"Helena-san…"

The French blond landed on the platform next to Hitomi.

"What were you doing?" asked Helena, "It's unlike you to attack people randomly."

"But those people are-"

"I know what you're thinking. But apparently that information was false."

"Nani?"

…

Location: Mugen-Tenshin Safe House (Nighttime)

"Ow!"

"Stay still!"

"Pretty hard to do when you're sticking senbons in me!"

Kasumi, Ayane, and Momiji just returned from a mission of getting a rare artifact for Ryu, only to meet some demons along the way.

Right now, Momiji is tending to Ayane, who got blindsided by an attack after Kasumi dodged it.

"I say we did pretty well with this mission- ow!"

"I told you to stay still!" Momiji hissed at her when Kasumi's cell rang.

"Oh stop it Ayane. It's Christmas. You're supposed to be happy. Hai?"

"Kasumi."

"Oh, hi Onii-san, what is it?"

"You and the other getting back here and meet up at DOATEC HQ."

Ayane grabbed the cell and asked, "Why?"

"Helena needs to see all of us."

…

Location: Where one can see a nice view of DOATEC HQ across the water.

Lightning Farron walked the shoreline, looking at the DOATEC HQ. Apparently she and her team are supposed to meet there along with several others just like her.

She was already in a bad mood, thanks to Snow. He tried to spread some holiday cheer with his teammates, but that backfired really badly. Don't ask.

"So this is it? DOATEC HQ?" Sazh asked, looking impressed.

"It's huge!" squealed Vanille.

"The building reminds me of Cocoon." Snow said.

Hope nodded, and said, "I just hope this isn't a trap. We had enough of that lately."

"Well Light, it's your call." Fang said, grinning.

"What else?" Lightning responded, "We're going in."

…

Next Fantasy: The battle begins, but they're fighting among each other. Will they realize the truth?

…

Omake 1

Kairi: Why?

Jeimuzu: What?

Kairi: It enough to do one story, but two with me? I'm overworked here!

Ace: Namine, pounce her.

Kairi: What?! Ok, ok! Sorry!

…

Omake 2

Victoria: Look Lightning, I know that your mad, but get over it or else!

Lightning: Or else what?

Sakura: I'm give you anger management classes.

Snow: Lightning's been needing them lately- hey!

Serah: Sister! Calm down!

Jasmine: And that just proves it right there.

…

SoulEmbrace2010: I'm going to have a lot of fun with this. LOL.