Author's Notes: In this AU Tsukune and Danny are cousins by their fathers side. Tsukune's father Koji is Jack's younger half brother. Long story short they have the same mother who divorced Jack's father and fell in love with Koji's father in Japan. Jack being Jack loves his younger brother and Koji just goes along with it so the Aono's and Fentons are estranged but are on good terms with each other.

Reason why I'm explaining this is because I'm too lazy to do it n the story and to avoid confusion.

I've seen the limited amount of Rosario + Vampire and Danny Phantom stories and thought to write my own mostly because f the lack of originality I've seen with the others. So this is more like a prologue of the main story so I don't expect you to be hooked but if you want more give me a review, follow and favorite.

Chapter 1: Curiosity Made The Ghost

The plane made a smooth landing on the runway something that the boy was all too happy for. Not that there was anything particularly wrong with the plane ride, no like the landing the ride itself was smooth. The change in time zones however were the only negative effects of the whole flight yet even that didn't get his spirits down much for he had finally arrived.

A smile made its way upon a 14 year old Tsukune Aono's face as he and his family disembarked the plane. The family of four entered the airport, there was the Tsukune, his parents and his cousin who asked, nay begged to join them. It didn't take much t convince his or her parents to let her join them since they're visiting family.

"HEY KOJI OVER HERE!"

He heard his father sigh; speaking of family he looked over to see the reason why they've come to visit. There was a giant of a man standing around seven foot wearing an orange jumpsuit, beside him was a woman wearing a blue jumpsuit. The man had a sign with the name 'Aono' written on it. Beside the woman was a younger girl who spared a glance of annoyance to the man but nonetheless smiled as they approached.

Then there was the last one a boy with black hair similar to the large man but with piercing blue eyes. He wore blue jeans and a white shirt with a red oval at the center of his chest. Upon seeing him the boy grinned and waved a little Tsukune returned the gesture and the Aono family approached their American relatives the Fentons.

"Jack" his father spoke "nice to see yo-" he was abruptly cut off when his brother gave him a bone crushing hug.

"Great to have you with us little brother, now come on, so I can tell you all about the new ghost hunting equipment I've been working on" with that he dragged Sahashi Aono away.

Kyouko Aono stood by Jasmine 'Jazz' Fenton with her hand on her hip "they still obsess with ghosts?" she asked in broken English.

Jazz folded her arms with a frown "unfortunately" she turned to her cousin "it's nice to see you again Kyouko" she bowed slightly.

The gesture put the Japanese girl off a little, it has been a little over three years since they last saw each other. She didn't expect the fun loving girl she knew to be so…professional.

"O-okay, nice seeing you too Jazz-san" she stuttered lightly.

Tsukune and Danny followed behind already engrossed in their own conversation, unlike everyone else they kept in contact with each other whenever they could, mostly through online games but would occasionally send pictures. Despite the obvious cultural barriers they were as close as brothers, it helps that they have similar problems.

That is, eccentric parents, nagging sister figures, bullies and are generally outcasts at school. The difference between them is that for Tsukune his parents were the normal kind of eccentric, his mother could be a bit ditzy and his father would sometimes be neglectful but that was mostly due to his demanding job. That's the reason why he gets one week of vacation as compensation for his hard work.

Another difference was that Danny had friends, best friends who he knew for a long time and while Tsukune did have friends they were more along the lines of acquaintances, they talked to each other at school but don't really do anything outside of it.

The family entered the RV and the ride was anything but silent, between Jack talking to his estranged brother, Kasumi's enquiry into the different sites, Jazz did small talk with Kyouko about the flight and Danny and Tsukune's conversation about a new game he brought, the vehicle was lively indeed.

It took them an hour's drive through traffic to arrive in Amity Park, Koji looked out the window to see a two story building with a command center and large neon sign which said Fenton Works. He shook his head lightly, for as long as he knew his brother he was always odd, admittedly he had moments of brilliance but odd, he liked to do things big and this…this is so Jack.

"Sam and Tucker are gonna come over tomorrow" Danny spoke helping Tsukune with his luggage up the stairs. They were going to sleep in Danny's room for the week, not that either minded.

Once inside his room Tsukune noted all the NASA posters, he had well been aware that his cousin wanted to be an astronaut, heck his profile name on Doomed online was Astroboy156. It made him chuckle a bit, Danny's obsession was borderline otaku. At this he spotted figurines and that broke the dam.

"What's so funny?" Danny eyed him quizzically.

"N-nothing" he replied "(just that you remind me of an otaku)" he muttered in Japanese.

"Hey I heard that!" Danny narrowed his eyes"and I am not an otaku, just because I want to become an astronaut doesn't mean I'm obsessed" he thumbed himself with a smug smile with his eyes closed.

Danny opened his eyes to see Tsukune with a Neil Armstrong action figure in his hand, he looked to Danny with a raised eyebrow.

"Well that's I, uh" he trailed off then swiped the figure from him "oh what do you know?" he placed the figure back on the counter.

Tsukune chuckled in his hand, normally he wasn't one to impose but he can safely say that maintaining through the many contact with Danny some of his 'American attitude' was rubbing off on him. Danny is an incredibly snarky individual when you get to know him. In fact most of Tsukune's recent courage came from witty banter he shared with the boy online over the years.

Danny turned around with a serious expression "did you bring it?" he asked.

Tsukune adopted a serious expression as well and grabbed a particular suitcase, they both stood over it. Tsukune unzipped the bag and a golden light seemed to shine from the suitcase

"I don't believe it" Danny whispered "you actually got it"

"Yes" Tsukune nodded "is very expensive" he added.

"It'll be worth it" Danny said resolutely.

One of the new things which Tsukune got into because of Danny is, of course videogames and while he's not like one of those uber nerds who spent every second of every day playing he can appreciate some as a casual player. It just so happens that their favorite game series was produced and released in Japan two months before they shipped it to America. Tsukune was able to buy one while they were in stock.

"I can't wait until Tuck gets here tomorrow then it'll be an awesome three way death battle" Danny grinned.

Tsukune couldn't help but smile as well, yes when his friends come home they will do battle and nothing would get in the way.

*SLAM*

Both teens jumped Tsukune closed the box and the light was gone, "Tsuki-chan Danny-san" his cousin's voice boomed.

Both teens turned to her "(Kyouko-chan, what's wrong?)" he asked.

The girl made way for Jazz to be seen "Jazz?" Danny voiced.

"Hello Danny, Tsukune. Kyouko and I were going for a tour of Amity Park and was wondering if Tsukune would like to join us" she said politely.

"Thank you Jazz-san" Tsukune began "but we were-"

"Of course Tsuki-chan's coming" Kyouko interrupted making her way towards him.

"(Kyouko-chan Danny and I-)" he began

"(Oh, you're right Danny can come with us)" she interrupted again.

Danny didn't get all of that conversation, his Japanese is about as good as Tsukune's English. He can keep up with a conversation for the most part but not when they talk too fast. So it was a surprise to him when his older cousin suddenly grabbed both their arms and dragged them out of the door.

Jazz blinked "Kyouko wait" she began running "you don't know your way around yet!"

Tsukune offered Danny and apologetic look that seemed to scream 'what can you do?' Danny couldn't really fault him for simply going along with it, from the way how she acts, Kyouko is a lot like his father, stubborn to a fault. With types like them its best to endure till it's over.

After three hours they arrived back at Fenton Works in Jazz's car, at this point jet lag was catching up to him. He wasn't drowsy per se but sleep was definitely starting to sound appealing. The teens walked into the house to the smell of something familiar or at least familiar to Tsukune and Kyouko but to Danny and Jazz

*Sniff* sniff* "what is that?" Jazz questioned and they followed into the kitchen.

The Fenton siblings' jaw dropped at the sight, their mother Madeline Fenton was in the kitchen, making dinner…and the area didn't spontaneously combust yet.

"Mom" Danny spoke, the shock event in his voice.

Maddie looked up from her work "oh, hi sweety, how was the tour, did you make sure to show Tsukune and Kyouko the sights?"

Danny shook his head "yeah um"

"You're cooking" Jazz spoke getting to the point.

"Actually, I'm helping Kasumi" as she spoke Tsukune's mother made her presence known, she was preparing the meat.

"Oh" Jazz seemed to sigh "hello Mrs. Aono" Jazz greeted.

"Hello Jazz-san" she greeted

Danny sighed in relief which did not go unnoticed by his cousin "is something wrong?"

Both boys turned their backs to everyone "let's just say mom is the reason why we keep fire extinguishers in the kitchen" he whispered pointing to the fire extinguisher, he squinted his eyes and could make out the words

"Break….in…case..mom…cooks?" he gave Danny an incredulous look.

"You weren't there before we got them and let mom near the stove" he grimaced at the memory and Tsukune had no choice but take his cousin's word for it.

After dinner and a shower Danny helped Tsukune set up a futon the post flight jetlag had finally caught up with him.

Tsukune woke up earlier than Danny and was pleasantly surprised to see that he did not give into temptation and play the game without him. Not that he particularly cared it was just the principle of it. Gathering his toothbrush he opened the door and headed straight for the bathroom when something caught his eye.

He remembered his uncle talking about some kind of basement lab; he stared at the door for a moment before entering the bathroom. They were guests in the house and while he was curious he wouldn't betray his uncle's trust.

It was later that Sam and Tucker came over and after introductions they locked themselves in Danny's room, barricading it for good measure in case Kyouko tried to drag them off like yesterday and to make sure they weren't caught off guard stockpiled junk food.

It worked for the most part and the game was so addictive that they didn't even notice the hours passed. Tucker, Danny and Tsukune played while Sam watched, she wasn't into games as much as the boys but kept busy. The boys witty banter was entertaining, especially when Tucker tried and failed to understand Tsukune when he spoke Japanese.

It wasn't until they finally completed the single player campaign that Sam came in "you guys finally done?"

"Yeah what time is it?" they looked at clock and was wide eyed "we've been playing for five hours straight!?" Tucker exclaimed "sweet" he added

Now that Tsukune thought about it, that would explain why he had the urge to pee, like right now. The boy scrambled out the door past Sam.

They heard the sound of the bathroom door closing "something tells me he's going to be in there for a while" Sam commented.

Danny got up and stretched "so what do you guys want to do now?"

Sam suddenly smiled "hey Danny, didn't you say your parents were working on something big in the basement?"

…..

Tsukune exited the bathroom with a lazy smile headed for Danny's room when voices caught his attention. What was really surprising was that it was coming from the basement lab, after a while he recognized them. Now he was a little apprehensive, one of the few absolute rules that his aunt uncle and parents gave him was that he wasn't supposed to into the lab without supervision, actually his parents outright forbade him from entering the place.

Eventually curiosity won out and he entered the lab before cautiously walking down the stairs. Tsukune was immediately in awe, there were pieces of technology lying on tables but that paled in comparison to what he saw at the end of the room. It looked like some kind of portal, or at least it was supposed to be anyway Danny mentioned it yesterday but seeing it up close he was awestruck.

*Click*

There was a short flash that brought him back to earth and he saw Sam with a camera while Danny held onto what looked like a white and black jumpsuit.

"Okay I showed you the portal. Now can we get out of here now? My parents could be back any minute" he asked worriedly then spotted Tsukune.

"What going on?" he asked walking up to Tucker.

"Sam wanted to see the ghost portal Danny told us about" Tucker answered.

"Yeah and we've seen it so let's go" Danny said again.

"Danny right" Tsukune spoke "we not allowed in here."

She scoffed but Danny pressed "besides they said it doesn't work anyways"

Sam went in front of the portal and so did Tsukune out of curiosity and noted that the inside looked like it could swallow him whole.

"Come on Danny, a ghost zone, aren't you curious? You gotta check it out at least" she urged.

"What!? No way I'm not going in there" he stepped back.

"Don't be such a chicken" Tucker teased.

"I don't see you volunteering Tuck" he glared.

"Dude, your parent's portal and I don't think you have any Jumpsuits my size" he surmised pointing at the racks of Jumpsuits his parent had with the Fenton's and the Aono's names on it.

Danny looked at the portal "I don't know"

A curious Tsukune went over and took the jumpsuit under his name and gaped '(how did they get my size right?)' he thought.

Sam too eyed the portal then Tsukune then Danny and a smile formed on her face which for some reason it reminded Tsukune of when his cousin got an idea that she wouldn't take no for an answer for.

"Okay what if Tsukune goes in with you?" she told Danny.

"What?" was Danny's response.

"Huh?" Tsukune looked at Sam.

"I can tell just you're at least curious about it Tsukune" she affirmed

"No, no, no, Sam, that's a terrible idea" Danny said "what if something happens?"

Sam's reply was to throw a second jumpsuit in Danny's face "then go with him and make sure nothing happens."

Danny gave her a withering glare to which she scoffed "two heads are better than one Danny besides aren't you curious about what's inside?" They all looked inside the inactive portal and Danny could feel his resolve wavering he looked at Tsukune.

He himself was unsure but it couldn't hurt, right? Feeling brave for once Tsukune shrugged and went behind a makeshift change room to put on his jumpsuit.

Looking down at the suit he spoke "you're right Sam" he smiled and looked at her "who knows what kind of awesome, super cool things could be in there."

They turned just in time to see Tsukune come into view. The Americans paused to gawk at him

"What" he asked, completely oblivious to the thing stamped on his chest.

*Smack* Danny's palm met his forehead, hard while Sam and Tucker bent down in fits of laughter.

"Dude, that is hilarious!" Tucker got out between laughs.

Confused, Tsukune looked down and flushed in embarrassment. Reaching for it he felt relief when he pulled the logo off his chest. Danny turned his jumpsuit inside out and low and behold he came face to cloth with Jack Fenton's face on the chest area.

Sighing in embarrassment he ripped the logo off and before changing into the suit.

"Wait" Sam said walking towards one of the other suits and tear off the black sleeves then using a pair of scissors, she cut them then walked up to both boys and stamped it on their chest.

On Danny's chest was a stylized 'DP' symbol while Tsukune had a similar style except it had stylized 'TS'

"Trust me that looks a lot better than having that on your chest" she pointed at Jack's face in his hand, Danny tossed it in the garbage.

Once done he looked to Tsukune who gave him a weak smile and they both nodded before entering.

"Whoa" Danny seemed to sum up their impression of inside.

The portal had more distance than it looked on the outside, the intricate circuitries which glowed blue gave it a phantasmal visage. Tsukune was cautious as he and Danny walked along the darkened walls

"You see anything in there Danny, T-man?" Tucker's voice echoed.

"No" Tsukune he replied.

"What he said, it's pretty dark in *click* here?" Danny turned to see what his hand pressed but saw green light pulsing through the circuitry of the portal.

The strange green energy spread throughout the room, lighting up the place. It was in that instant Danny saw an 'On' button.

"W-what happening?" Tsukune looked around nervously, something Danny could relate to.

Both boys began to edge away when a bright green light shone at the end of the portal temporarily blinding them

'Maybe this wasn't such a good idea' were the boys' final thoughts before a wave of ectoplasmic energy drowned them and the only thing that could be heard were blood curdling screams of two boys trapped inside the portal.

Author's Notes: So here's the first chapter, I'm surprised no one has never thought of this before but I dare to be different to dream of something other than 'Danny being sent to Youkai by some means or the other.' But come on tell me no one was ever curious if it were the other way around and I know Ghost Fang did but at least Tsukune some credit and have him take a lesson in badass, seriously not enough love for the Aono man.

Anyway tell me what you guys think of the first impression in the review section, it's been a long time since I watched Danny Phantom and I mostly wrote this because of several Rosario + Vampire stories and other Danny Phantom crossover I read recently.