Don't own Ranma, Sailor Moon, Kingdom Hearts, or any other anime or game that may appear later on during this fic.

AN: I haven't played Kingdom Hearts in a while and I sadly haven't played the second one since my ps2 broke and I've had that game since it came out. Because I haven't played Kingdom Hearts 2, I'll be using info from only the first one. If I mess up somewhere along the lines, it'd be nice if someone can tell me and I'll see what I can do to fix it. I am also looking for a beta to help me out and I would also appreciate any critique that anyone has. All I ask is that try not to be too harsh.

Summary: Ranma gets attack by a mysterious creature shortly after the attempted wedding. As he fights on after the encounter, he shall be fighting against the forces of darkness, as well as the forces of light. Multi Crossover

Warrior of the Key

Chapter 1: Heartless

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A long, long time ago, there was a man who was known as the Wild Horse. He was a man who was said to be the greatest fighter of all time. He was awed and feared by many. One day, it was rumored that the Wild Horse had created a being which was said to devour the hearts of people. Deciding to act upon the rumor, Wild Horse was sought after by armies and mercenaries in the form of a large bounty. After many countless encounters with the Wild Horse, he was finally killed by a warrior who was said to control the power of time. After the death of Wild Horse, the being which devoured hearts was sealed away by the Queen of the newly formed empire, the Moon Kingdom. After the being was sealed, the Queen recruited seven new Senshi to replace the seven who have fallen to Wild Horse. The rise of the Silver Millennium rose quickly after. Wild Horse as well as the being were never mentioned and were soon forgotten by everybody but one person.

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Ranma Saotome was going through his thoughts and recollections as he lay down on top of the roof of Furinkan High School. Ranma chose this spot seeing that it was probably one of the last places that a person would look for him seeing that a lot of the chaos that's happened in the past year has occurred here at the school. As Ranma looked up towards the clouds, he was thinking of what he had done just a week ago at Phoenix Mountain. He had defeated Saffron of Phoenix Mountain at the cost of Saffron's life. It was Ranma's first kill and while Saffron did return to being an egg waiting to be reborn, Ranma still felt as though he had killed him when he used the Hiryū Hyou Tōppa (1).

After a few more minutes of reminiscing of Phoenix Mountain, he then thought of what happened yesterday as his father and Soun set up a wedding for him and Akane. Ranma thought that it probably wouldn't be that bad if he married Akane, but he wanted to make sure that the honor of the other ladies was sustained also. As Ranma thought of ways to make sure that all of the girls honor was sustained, a thought suddenly crept into his mind.

'Why the heck is today peaceful? I would've expected at least one of them to try and take advantage of the situation that occurred yesterday. Geez, this is getting annoying.'

Ranma looked at his new watch that Kasumi gave him yesterday saying that it had a new alarm system in it that is guaranteed to wake him up.

'5:30? It looks like I've been here for five and a half hours now.' Ranma thought as he got up from the roof. 'I might make it to the ice cream shop if I hurry.'

Ranma jumped off the roof of Furinkan High and landed on a branch of a tree nearby. He then jumped from a higher branch to a lower branch until he was promptly on the ground. Ranma then started to run to the ice cream shop hoping to grab a quick sundae before the shop closes.

As Ranma ran, he jumped onto a fence and continued running. As he made a turn that would lead him straight to the shop, he tripped and landed into the river which was on the other side of the fence. Ranma didn't react in time and landed with a big splash. Ranma's curse was triggered instantly and was now in her female form.

"Need any help?" a voice called out to Ranma.

Ranma looked at where the voice came from and saw that it was coming from a female who was wearing a black t-shirt and some jeans. She had a happy expression plastered on her face with her green eyes looking right into hers. Ranma also could've sworn that she saw a strange creature that was sitting on her shoulder before it vanished. Ranma shook her head and started to move towards the bank of the river. As she started to walk on solid ground, she slipped and landed back into the river.

'What the heck is going on here? I'm not normally clumsy, but the last time I was like this was when I encountered…' Ranma's thoughts then paused as she looked over to the girl who was looking at her. 'It can't be. I was told that she died seven years ago due to the nekoken.'

"Are you alright? Do you need any help?" the girl asked, snapping Ranma out of his thoughts.

"I'll be fine. If you'll excuse me, I have to go." Ranma yelled as she jumped over the fence and started to run towards the ice cream shop.

The girl looked confused as Ranma left and shrugged. She walked off shortly afterwards and continue with what she was doing.

Five minutes have passed and Ranma just barley arrived at the ice cream shop. The owner was about to close the store when he saw that Ranma had arrived and yelled at a worker inside to prepare a number 2 wild horse special. Then owner then placed to sign to close and invited Ranma inside the shop. The owner was an old man who appeared to be in his late sixties and still had the body of one who was fifty.

"You barely made it Ranma," the owner replied as he pulled up a seat for Ranma to sit in.

"Thanks gramps." Ranma said as she sat. "Today has been too strange and I need something to make it feel like normal."

The owner smiled and walked to the counter. Ranma's sundae just finished and the owner brought it over to Ranma. Ranma accepted the sundae and looked at the owner. "Thanks a lot gramps. It's great knowing that there's still people in this world that are kind."

"Anytime Ranma. This one's free so eat up." The owner replied as he pulled a chair from across Ranma and sat.

Ranma started to eat the sundae and continued to eat while the owner just watched. After a couple minutes, Ranma finished the sundae.

"That was really great." Ranma replied after eating the last bite.

"Glad to hear it. So how was your day? I noticed that you're a little wet there."

Ranma sighed and then spoke. "Today has been a strange one. Everyone is keeping their distance for some reason and except for this one part where I tripped and fell into the river."

Ranma was then interrupted as the owner laughed. "That's funny. The great sex changing martial artist tripping and falling into the river."

"It's not that funny gramps." Ranma replied in an annoyed tone.

"Sorry, it's just that it sorta reminds me of how you triggered your curse here on one of your visits." The owner said.

Ranma decided that a sundae was in order after being hit by Akane's mallet for something that Akane thought was perverted. Ranma landed a block away from the ice cream shop and the owner happened to walk by on his way to the shop. He saw Ranma change as Ranma landed in a puddle of water. The owner noticed that the person who had shifted genders also happened to be one of his best customers. Ranma looked at the man as she got up and cursed seeing that there is now another person who knows of the curse. Ranma, expecting to be treated like a freak cringed a little, but was surprised to see the man offer a hand to the martial artist. After that incident, Ranma and the owner became friends and the owner then learned of Ranma's past. After hearing everything, the owner would discreetly lower the price of an ice cream or a sundae saying that there was a discount of sorts while increasing the price for anyone who was treating Ranma unfairly. It was also during that time in which Ranma started calling the owner 'gramps'.

"I have to get going for now gramps." Ranma replied as she got up.

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Ranma left the shop a minute later as waved good bye to the owner. The owner waved back and then started to fall down onto the ground.

"GRAMPS!" Ranma yelled as she ran towards the owner.

Ranma stopped about half-way as she saw a black creature appear from the shadows. 'What the hell?' Ranma thought as she saw the creature. The creature was about a foot tall with two antennae coming from the top of its head. It was pitch black in color and had a golden yellow color for its eyes.

Ranma then saw that a heart appeared over the owner. The creature then grabbed the heart and absorbed it into itself. Gramps started to fade quickly and was soon gone as if he never existed.

'What's going on here?' Ranma thought. Before she could think of anything else, the area where pops was coved with a shadow and soon became a duplicate of the creature. The two creatures then looked at Ranma and were soon accompanied by a third one. Ranma noticed that the ki signatures coming from the owner and the worker at the ice cream shop were no longer present and came to only one conclusion. 'Gramps and his associate inside must've been killed. I better get out of here now and assess what's going on. If I fight blindly right now, there's the chance that I will lose. I better head back to the dojo and warn everyone of what's happened.' The three creatures then looked at Ranma and started to advance towards him.

"Crap." Ranma said as she jumped back.

Ranma turned around and did one of the things he hated the most. He ran from the creatures and headed to the dojo. As Ranma ran, she was thinking of what just occurred. 'Gramps told me that he was once a powerful martial artist before he had an encounter with a warrior due to a huge mistake. Since then, he had sworn that he would stop using the art as a form of atonement. If he was killed that easily, I doubt that I would stand a chance at the moment.'

Ranma looked back and started to gather some ki. After collecting enough ki Ranma looked forward to see where she was heading. She saw that the path would be clear for a few seconds and then turned around to fire her ki attack. "Mōko Takabisha"(2) The yellow ki blast darted towards the three creatures and two of the three dodged the attack as the swiftly reverted to being a shadow on the ground. The third one didn't shift fast enough and was hit with the blast. After the smoke cleared from the blast, the creature was still standing and continued it pursuit of Ranma.

"Dang!" Ranma yelled as she continued to run. "That attack had no effect on it at all."

A minute later, Ranma was at the Tendo compound and ran over the front gate. The three followed and changed into their shadow form and moved under the front gate into the compound. "Akane, Pops, anyone here?" Ranma yelled.

Ranma waited a few seconds and entered the Tendo household. As she entered, she noticed that there was only one ki signature left in the building. Ranma ran to the back and was surprised to see her father in a completely serious state and in a stance that looked vaguely familiar. She then noticed that her father was surrounded by five of the same creatures that are currently pursuing her.

Genma crossed his arms and then unleashed his attack by spreading his arms apart. "Kijin Gun-Dai Ran Bu" (3)

The attack caused vacuum like projectiles to appear and each one struck each of the heartless. Genma looked at Ranma and fired three more vacuum blades at Ranma's current annoyances. The attacks whizzed by Ranma and the three creatures vanished within an instant. "Pops, what the heck is going on here? What are you doin' with the Yamasenken?(4) I thought that you sealed that style of fighting." Ranma asked as she jumped to her father's position.

"Ranma! Glad to see you're still alive boy." Genma replied in a happy tone. His tone then changed back into a serious one. "Looks like the heartless are attacking."

"Heartless?" Ranma asked.

"When you were in the Nekoken, the old woman who treated you said that there would be a time seven years into the future when we would be attack by those without hearts. The ones that we've just been fighting against have been classified by me as Shadows. I have a journal that was give to me by the old woman. You're to have it and get out of here. I'll stall them for as long as I can."

"Pops, what are you saying?"

"GET OUT OF HERE! ALL THE SHADOWS ARE GOING TO GATHER HERE SINCE WE'RE AMONG THE LAST ONES LEFT IN THE WARD." Genma yelled looking directly into his son's eyes. "Son, they've killed all of the Tendo's as well as your mother. The future of Anything Goes is at its end with you. Ranma, you must survive and carry on our legacy."

Ranma looked at her father and sheded a tear. Ranma nodded and headed back into the household to grab all of his stuff as well as his fathers. As Ranma ran up the stairs, she sudden sensed her father gathering up his ki and heard her father's yell as he attacked. "Sai Dai Kyuu Kijin Raishü Dan"(5)

"Father…" Ranma said as she entered his room.

She found his father's bag and grabbed the journal out of it. The journal had 'Chronicles' inscribed on the title and before Ranma could think of what to do next, she suddenly felt her father's ki signature vanish.

"FATHER!" Ranma yelled out as loud as she could.

Ranma grabbed her bag and placed the journal inside it. After making sure that everything was clear, she ran out the window and landed on the ground. Ranma saw that the heartless were more in number and were targeting her as she ran from the Tendo's. As she ran, she saw that there was a figure wearing a black cloak. Ranma ran towards the figure and yelled at it. "Run. Get out of here."

The figure looked at Ranma and then revealed something from within its cloak. Ranma thought that it was a sword at first and then saw that it was a giant key.

"How would you like to have the ability to fight against this darkness?" the cloaked figure asked in a deep voice.

"What do I have to do?" Ranma asked as she continued to approach the cloaked person.

Ranma looked back quickly to see how far the heartless are and saw that they were frozen in time. Ranma turned back to see the cloaked figure still standing where it is.

"Answer these questions and you shall receive the power to fight against the darkness. First question: What are you afraid of?"

'What kind of question is that?' Ranma thought. "Simple, I'm afraid of being indecisive."

"Second question: What do you want out of life?"

'Another strange question.' Ranma thought before answering. "I want to be strong."

"Third question: What's most important to you?"

'What is important to me? According to pops, they've all died.' "I…" Ranma paused thinking of what to answer. "I…" 'I used to think that being strong was all that mattered. Now that I saw pops' true strength as well as seeing Gramps die, being strong isn't enough.' Ranma's thoughts then drifted to a conversation that she had with Gramps shortly before heading to China a short while ago.

"Ranma, you should know that being strong is never enough. Being strong will make you feel partially complete, but it will never make you whole. You will have a longing for something, and that something will be discovered soon enough. For me, I was among the strongest there was, but I've always felt so empty inside. If it wasn't for meeting up with people who I've gotten to know as friends, I would have been alone. I know that you really don't have any friends besides me, but if you truly wish to be whole, you should find that something as you continue on with your life."

"Friendship." Ranma answered.

"The path you shall face will be slow and fraught with peril. At the end of this path, you will find what you are looking for as your journey now begins at the time of night." The figure said right after Ranma replied his final answer. "For now, I shall entrust the keyblade to you and you shall fight against the approaching darkness that will come with the heartless."

Ranma sensed something behind her and saw that it was the key that the figure was previously holding. Ranma grabbed the keyblade and sensed that time has been restored. The heartless approached Ranma at the same pace that they were previously moving at and when Ranma quickly turned around to ask the figure something, the figure was gone as if it was never there.

Ranma looked back at the heartless and gripped the keyblade using only her right hand. Even though the keyblade appeared to be a two-handed weapon, Ranma didn't want to use both her hands since she was more accustomed to unarmed combat. She swung the keyblade in a horizontal arc as the first wave arrived. The first five heartless that approached Ranma were hit by the keyblade and vanished in a vapor of black smoke. Ranma noticed that the heartless didn't return and started to destroy each and every single one of them.

Half an hour later, Ranma was still fighting off against the heartless. She was sweating a lot and was complaining that Saffron was easier to beat then the heartless. She noticed that as she fought, she was back at the Tendo Dojo. 'Man this sucks.' Ranma thought as she took a quick break after destroying what appeared to be the last of the Shadows a minute later. 'They must've taken over the entire ward. For now, I better get to Juuban and think of what to do next. I don't know how Mom's going to react after she hears the news that I have for her.'

Ranma went into the Tendo household and grabbed what provisions she could before she left. She took some of the food that was in the refrigerator as well as some medical supplies and decided that it would be enough to get to Juuban. Ranma also made sure that she became a he again before heading out. After Ranma reached the front gate to the Tendo household, he looked back at the household and dojo and vowed that he will return one day.

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Hiryū Hyou Tōppa: Ice Dragon Breakthrough

(2)Mōko Takabisha:Pride of the Fierce Tiger

(3)Kijin Gun-Dai Ran Bu: Group of Gods Great Boisterous Dance

(4)Yamasenken: Thousand Fists of the Mountain