Title: Chaos Rising: Chaotic Evolutions

Author: Katreal

Category: Digimon Seasons II and IV Crossover

Genre: General

Timeline: Frontier-AU after Lucemon's defeat. 02- AU after the Holy Stones Arc. Oikawa and the Dark Seeds never happened ;)

Notes: Mostly Kouji and Kouichi-centric

Disclaimer: …I don't own anything that has to do with any seasons of digimon.

A/N: Ano…I never thought about the fact that Kouichi and Kouji voices were that different Now I'm stuck. The hair I can kind of explain…Lets just say that Kouichi decided to grow his hair out a little bit longer so it doesn't look so obvious…After all it has been three years since the anime…The clothes can also be explained. The 02 digidestined wore a different outfit when in the digital world…Hmm…the difference between their digimon forms…well Anyamon is significantly larger then Akemon, and they are the same type of digimon so the Chosen might think that Anyamon is the champion level of Akemon…Hmm…for those of you who can't see the resemblance between Kouichi and Osamu…it isn't very important, Ken just misses his brother so when he saw 'Kouji' without the bandana, the haircut just reminded him of his brother…Erm…back to the voice problem…lets all pretend that Ophanimon did something that miraculously lowered Kouichi's voice so that the difference isn't as obvious…okay?

Now that the problem is taken care of (somewhat) lets get the chapter started! nn;

P.S. Oh yeah…when in the 02 or 01 Chosen's POV in the real world I'll refer to Kouichi as …Kimura because none of the 01/02 chosen know 'Kouji' well enough to be comfortable using his first name, and Kouji as Akemon. I just realized that it might be confusing when I switch POV's between 01/02 and Frontier because Kouji is Kouji but Kouji could also be Kouichi…See? Confusing, ne? Anyway, In the Frontier POV they will be referred to by their rightful names. You can usually tell which POV I'm writing in by the first name after the change. For example, Taichi is the first name after I started the chapter, so the segment up until the border is in the 01/02 POV. After the border you just look to the first name in that segment. Usually I'll alternate between 01/02 POV and Frontier POV evenly but sometimes the border is needed as a scene change so occasionally there will be the same POV on both sides of a border…e.e Did I just confuse you all? Sorry if I did but I'm having a little trouble explaining this…just remember…borders signify a POV and/or scene change and the find the POV just look at the first name mentioned in it. (Gah! The Authors note is almost a page by itself! In pt 9 font and 1.5 spacing!)

Last Time:

Izzy turned back to the pile and coughed, "Ahem…"

Taichi was the first to untangle himself, he looked at Izzy sheepishly, "Heh, heh, hi Izzy."

Izzy crossed his arms, "What took you so long? I was worried."

The brunette winced, "Well…you see…"

His reply was cut off by a strangled cry. The two older digidestined turned to see Ken staring at the new kid in disbelief, as if he had never seen him before. The other teen stopped rubbing his head and looked at Ken with confusion written all over his face, "Ken…What?"

Ken just continued to stare, trying to make sure that he wasn't seeing things. "Osamu…" He mumbled to himself, "Oniisan…"

Right after that he promptly fainted, leaving the rest of the confused chosen and digimon to their own thoughts.

Chapter 5

Taichi was the first to recover from surprise. The brunette, who was the closest to the Chosen of Kindness, poked Ken in the side. Getting no response he glances at Izzy, "What happened?"

The resident genius ran a hand through his short red hair, "I don't know. Did either of you hear what he said?"

"I did…" The blue-eyed teen spoke up softly, his eyes focused on the floor.

Izzy glanced over at the new arrival, seeing that whatever Ken had said was bothering him, "What was it?"

Kimura looked up, his gaze shifting from the floor to something behind Izzy, "He said a name…And then…"

The blue-eyed teen took a deep breath, his words soft, "He called me his brother…"

Kouji went ridged. His twin's words struck a cord deep within him. The warrior of Light heard the last two words echo through his mind, 'his brother'. A low growl threatened to build within his throat; it took every bit of will power Kouji had to squash the offending sound.

It seems silly doesn't it? Why would that innocent statement upset Kouji so much? Well, the truth is, Kouji was rather possessive of his brother. He had only found Kouichi three years before, and then almost right after finding him, he lost him. He still remembered the anger and grief he had felt as Lucemon absorbed Kouichi's data. Kouji could recall the joy when Löwemon informed them that Kouichi was still alive. But the most vivid moment of all was when he was gazing into Kouichi's lifeless eyes. The fear that he was gone for good was forever etched into his mind.

Now…I suppose you are asking what this has to do with Ken's words…correct? Well, as I said Kouji was possessive. In his mind, Kouichi was his brother, his twin, and no one else's. Heck, he had even gotten upset when Tomoki, the warrior of ice had started to look up to Kouichi as a brotherly figure. Kouji hadn't minded when Tomoki called him an older brother…but calling Kouichi an older brother…well…lets just say that both Tomoki and Kouichi had refused to speak to the Warrior of Light for a week.

I guess that deep down inside, Kouji was afraid of someone taking his place in Kouichi's eyes. It was understandable really…Kouji, having been a loner for the most part of his life, finally had someone closer than an acquaintance, closer than a friend…a brother. Most people don't appreciate their siblings. Always fighting, always squabbling, and always wishing to be an only child. They don't ever understand that being an only child was lonely. They don't understand the wish to have someone who will always be there for you, the wish to have someone who understands you, to have someone beside you ever since the beginning, to have someone who actually cares that you exist.

Of course parents care, but it's not the same. Siblings may not agree all the time, but there is always something underneath the fights, underneath the arguments, something different then the affection of a parent.

Back, before the Digital World, Kouji used to always watch the interaction between brothers and sisters enviously. Deep down, despite the cold façade he showed the world, Kouji had always wished for a brother, or even a sister. He went through life growing even bitterer towards people around him because he never had anyone who actually cared. His father had cared, but Kouji saw his father's second marriage as a betrayal and didn't pay any attention to the man's attempts to form a father/son bond. The people at school hadn't cared either. The girls only were paying attention to him because he was smart and 'cute'; the boys thinking he was a snobbish stuck up kid. Kouji had even begun to dislike people in general by the time he had turned 10.

But at Age 10 came the Digital world, forcing him to discard his mask of indifference and work with others and save the world in order to get home. Meeting Takuya and the others had made Kouji question his judgment of the human race. Eventually he found himself opening up to them. Then, when all his emotional defenses were down, Kouichi was thrown into the mix. How do you think Kouji felt when he discovered that he had a brother? Discovering that his own father had failed to mention that he had a twin? To have the very thing he had been wanting for the entire ten years of his life and then to lose him mere days after? That had shaken Kouji to the core; the pain that had come from those events had haunted him for months afterwards.

Now that wound had just been torn open. Kouji wouldn't meet his twin's eyes. In an instant he was on his feet and dashing out of the room. Kouji ignored Kouichi's shout and jumped out an open window, onto the balcony. He glanced around franticly, realizing that he was about 10 floors up in one of the apartment buildings that were rather common in many cities around Japan. He hopped onto the rail of the balcony and glanced down, sure enough there was another balcony below. He jumped off, utilizing his wolf-like form's reflexes to land safely on the lower balcony. Kouji jumped down another floor, glancing back up to find Kouichi staring down at him, "K- Akemon!"

Kouji turned away and continued his way down; he didn't see Kouichi dash back inside and head for the stairwell. He didn't see Taichi run after Kouichi. He didn't particularly care either. He knew he was acting foolish by running away, but Kouji needed some time to think, he needed to be alone. Reaching the first floor Kouji hops onto the ground level, startling some passerby out of their wits. He dashed away, heading toward the only 'forested' place that he could see, the park.

Izzy watched as Kimura ran out of the apartment, followed closely by Taichi. The red-head himself was tempted to follow, but he decided to stay behind and watch Ken. The former Digimon Kaiser was still out cold, though he seemed closer to waking up then before. Izzy sighed and looked at Wormmon, "Do you have any idea what just happened?"

The green insect digimon was silent for a moment, "About Ken fainting…yes…about what happened after…no."

The Chosen of Knowledge nodded, "I see…care to elaborate?"

Wormmon sighed, closing his sky blue eyes, "Well…I've only seen pictures…but the new kid…Kimura Kouji I believe…looks a lot like Ken's brother Osamu who died years ago. Ken has been missing his brother a lot lately…"

"Soo…" Izzy pondered, "His unconscious desire to see his brother must have fooled him into thinking that this…Kimura…was his brother. Then he fainted from shock."

"Correct." The insect digimon confirmed.

"What I don't understand…" Izzy began. "Is why it happened now? Why not when you all first met up?"

Wormmon cracked one eye open, "Well, like Daisuke, Iori, and Miyako, Kimura looks different in the Digital World. He had a bandana covering his hair. Ken didn't notice the similarities until he had seen Kimura without the bandana."

The red-haired genius nodded, "I see…"

Kouichi practically flew down the stairs, startling many others that were using them. But the Warrior of Darkness didn't care; the only thing on his mind was his brother. He understood why Kouji had reacted like that. Normally Kouichi would leave him alone until he solved the problem himself, but normally this happened in a place they knew. Parallel worlds do not count as familiar places.

Upon reaching the ground floor, Kouichi pushed the door open, pausing slightly when he heard a muffled yelp. Sprawled on the floor was a familiar brunette. Kouichi winced and offered his hand to the fallen teen, "Sorry Taichi."

Taichi took Kouichi's offered hand and got to his feet, rubbing his nose where the door had hit it, "No problem. What happened up there anyway?"

"No time to explain." Kouichi murmured, "I have to find him."

Taichi nodded, "Let me help. I know Odaiba better then you."

The warrior of darkness inclined his head, "Thanks…um Taichi…how did you get down here before me?"

The brunette grins, "The elevator."

Kouichi resisted the temptation to whack himself on the head for not thinking of that. Instead he just nods and heads out into the city.

Yagami Hikari sighed as the doors of the train opened, hefting her heavy pack onto her shoulder. She glanced around to see that the others were also preparing to get off the train. Takaishi Takeru also shouldered his bag, glancing at her, "Are you sure you'll be alright heading home by yourself?"

"Yeah!" Motomiya Daisuke interjected, "'Cause if not I'll walk you home!"

Hikari smiled, "Yeah, I'll be fine. I have Tailmon with me, remember?"

She pointed to her heavy backpack to emphasize her point. Daisuke pouted, "I guess…"

Inoue Miyako sighed, "Sheesh…when will you ever give up Daisuke?"

"Uh guys?" The youngest Chosen, Hida Iori spoke up, "We'll miss our stop if we don't disembark."

With no more delay the Chosen Children quickly left the train, watching as it rolled on down the track. Takeru left Hikari's side and went to stand with Miyako and Iori; they all lived in the same apartment complex. He smiled slightly, "See you at school Hikari."

The brown-haired girl nods, "Yeah."

She turns and starts to walk down the street, before glancing behind and waving, "See ya later guys…"

Hikari sighs and glanced at her watch. It was getting late, almost 7pm. She walked in silence, the daylight dimming as night approached. The Chosen of Light choose a less traveled route to her home, passing by a park that her brother often frequented. As she passed the entrance she felt her bag shift. Frowning she glanced over her shoulder only to find her digimon partner climbing out, "What is it Tailmon?"

The cat digimon didn't answer; instead she began sniffing the air. After a few minutes she narrowed her blue eyes, "I smell a digimon."

Hikari frowned, "Are you sure it's not one of the others?"

The white cat nodded, her purple tipped ears lying back against her head, "Positive. It's in the park."

The brown-haired girl nods, "Understood. Let's check it out."

Tailmon grabbed a lock of Hikari's hair and used it to steady herself as the girl headed into the park.

A/N: Well….Sorry for this being about a week late….but I went to the County Science Fair the weekend before last (Won Second Place in Earth Science as well n.n) and then got Kingdom Hearts shortly afterwards. I've been playing that in my spare time…The game rocks :D. Anyways…last weekend I was sick…so…that's my excuse. Actually…I'm still sick…I stayed home from school today…Well…I'd like to thank everyone for the reviews. They make me happy n.n. Normally I'd do responses but…As I said I'm not feeling good…and my parents usually don't let me on the computer when I'm sick…I just want to get this posted as quick as possible…okay? Anywho...I hope you liked this chapter. Review if you liked it.