Hey guys! So not much happens in this chapter, and I decided to have Conan spill the beans about himself a bit later because, it just ended up working better for the story development, sorry. But the truth about him will come out to Luffy during this arc, I swear! The point of Fishman Island is to be the last up-hill battle, so it will be treated as such. Anyways, I've gotten several votes about who the Black Organization character will be and so far it's Gin, Vodka, and Vermouth that are in the lead. Remember, if you guys want to see someone different, vote! However, I've pretty much decided I'm going to kill him off or strand him in the One Piece world to take punishment. I've pretty much decided where to put the diary at this point, but I'm not positive about it. So anyways, read, enjoy, review!

Disclaimer: I don't own One Piece or Case Closed

Shirahoshi sniffled as she looked at her surroundings; she was not in her room, and Megalo wasn't anywhere around. Whenever she got too scared, she got suddenly sleepy and would pass out for a few hours. The only thing she knew about her location was that she wasn't in the palace, and that she was in Decken's custody. He had been nice enough to send in female fishman so far, but they always had the usual wedding proposals and announcements. She was later told that the reason why Decken hadn't seen her yet was because it was bad luck for the groom to see the bride on the wedding day. She was going to be forced to marry Decken in a matter of hours, and she felt helpless. Going into another crying fit, she once again, passed out.

At Ryuugu Palace

After Neptune explained to Conan about Van Decken, as well as what happened in the past with Otohime, the detective, pirate captain, and friends were shocked. After a moment, Conan spoke. "So basically, after Otohime-sama's death occurred, Princess Shirahoshi was marked by Decken-san, and has been after her for the past ten years." The king nodded. "Where I come from, he'd be classified as a pedophile."

"Believe me, we all see him that way." Manboshi sighed. "So what's your plan?"

"Well first off, Otohime-sama was murdered by another fishman, not a human. The timing wasn't right, and they wouldn't have had the connections or equipment to pull it off. It was most likely done by an extremist, like Arlong-san." Conan pointed out. "Moving on, we'll assume that she's being held captive in someplace where no one can see her, and not easily noticeable. Are you sure they haven't left the island?"

Deciding to ignore the deduction about the late queen, Fukaboshi responded. "As part of the deal, they promised to keep her on the island until further notice. As well as promising to keep her unharmed, they also promised that she would remain out of Decken's physical contact. They expect you in about two hours now."

"And it's safe to assume she's trapped in the same place as Decken-san." Conan put on a thoughtful face, and then turned to Keimi. "Keimi-san, Hachi-san, Pappug-san, do you know anyone who knows this island, inside and out?"

"I do actually!" Keimi cheered. "I work at the famous Mermaid café here, and my boss, Madam Shyarly, knows this island better than anyone!"

"Really?" Conan raised a brow.

"Yeah! She's also this island's fortune teller! She's always right!" Pappug pointed out.

"Really?" Conan sounded less enthusiastic now. Never once believing in fortune tellers since he was a kid, Conan now thought this woman was less reliable. "Well I suppose it'll have to do."

"Huh? What do you mean, Conan?" Luffy blinked.

"Here's my plan, we split up." Conan announced. "We can't panic these people, so we need to make it look like nothing conspicuous is going on."

"How do we do that? Arlong's already knocked out." Jinbe pointed out.

"I know. I go with Arlong. WAIT!" Conan put a hand up to stop the barade of objections. "Let me finish. Luffy-san somehow, comes with me; meanwhile, Marguerite-san- you go with Keimi-san, Pappgu-san, and Hachi-san to the Mermaid Café, and let your boss know what's going on. You guys will be responsible for finding the King's Diary."

"Understood." Marguerite nodded. "When should we meet? What's the designated location time?"

"Not sure, Jinbe-san. Where do you propose we meet?" Conan asked.

"Hmmm…let's agree to meet in the Sea Forest; Decken is most likely hiding there, and it's a safe bet due to its size. We'll meet by the Poneglyph. Sound good?" Jinbe asked.

"Sounds good, but the problem is Luffy-san and I don't know where that is." Conan pointed out.

"It's on the tip of the Sea Forest, you can't miss it." Jinbe replied.

"Saa...let's go! We've got a princess to save!" Luffy pointed forward.

"Hold it Luffy-san! They can't know you came along with me!" Conan exclaimed.

"I know! I've got an idea for that!" Luffy declared. The room stared at him in surprise. This guy was capable of coming up with ideas?

"What's your idea Strawhat-san" Neptune spoke up.

"That shark over there's tame, right?" Luffy pointed to the crying shark.

"Eh. That's Megalo, Shirahoshi's pet shark. He normally goes everywhere with Shirahoshi." Neptune replied. "Why?"

"He knows not to swallow people, right?" Luffy asked.

"Of course!" Fukaboshi rpelied. "He's been trained from puppy-hood to be friendly towards allies, and deadly towards foes. What is your idea exactly?"

"Shishishi…" Luffy grinned. "I've always wanted to do this…"

10min Later

Arlong groaned and rubbed his head as he woke up. Snapping his eyes in realization, he jumped up and looked around. What he saw in front of him, surprised him. There was the human-boy he was supposed to capture, done up in shackles on his wrist and abdomen, with a pissed-off look on his face. Looking around, he didn't see the boy's companions at all, and he could've swore something else was off in the room, but ignored it. Arlong's frown deepened when he noted Strawhat wasn't in the area at all. "Oi Neptune, what happened while I was out?"

"After Edogawa-kun eletricuted you, we took the humans, including Strawhat out of their air bubble and forced them into submission. Theire currently being held in the cell; we're waiting from your side as to what to do with them." Neptune explained.

"Hmmm…what about Jinbe and the others?" Arlong questioned.

"Also in holding cells; Jinbe will be executed, and the mermaid and Hatchan will be awaiting trial along with Pappug. Now…Shirahoshi's return-"

"Shashasha! That won't happen until this kid's done and delivered!" He cut off the good king. "Besides, Decken's in charge of her delivery, not me."

"Bastards!" Ryuboshi yelled. "You said!"

"I know what I said, I don't know what they said though." Arlong grinned.

"Tch. You guys don't plan on letting Princess Shirahoshi live, do you?" Conan glared. "All of us are nothing but sacrifices in this game, aren't we?"

"Shashasha! It's nothing personal! Just the way things are! By the way…" Arlong yanked Conan's chain forward. POW! The whole room watched in horror as the buff fsihman, sent a bad blow to Conan's face. The boy hit the ground hard under the air bubble. "That's for earlier; try that again, and it'll be my teeth making implants on yah!"

"Tch…" Conana struggled to get up. Damn, Jinbe wasn't kidding when he said Fishman were ten times stronger than humans. Conan was surprised his jaw didn't disconnect from his jaw. "Bastard."

"You really are, Arlong." Neptune growled. "Take the boy, and bring back my daughter. Please…I beg you!"

"Shashasha! Come on brat, no need to keep the lady waiting!" The sharkman pulled Conan along, ignoring the wining from the boy. As Conan was dragged behind the large fishman, he glanced back behind him, and gave a reassuring nod to the group. Everything (other than the punch), was going to plan.

With Jinbe's group

Jinbe fisted his hands, while Keimi and Pappug were crying into Hatchan's shoulder. This was hard, but that detective as risking everything for them, they couldn't afford to. With a heavy sigh, Jinbe forced them forward, Conan was doing his part with Luffy, Marguerite had to lead her group to do the same. The human girl was already waiting at the Mermaid Café.

1hr-With Conan and Arlong

As Conan was forced along inside the bubble around himself, he couldn't help but want to wipe that smirk of Arlong's face. He was so getting the damned fishman back for that punch! Looking behind him, he smirked at the object following them. He hoped Luffy was okay though.

"We're here." Conan was stopped abruptly, and came face to face with what he was sure, was the 'Flying Dutchman'. The ship was huge ark, but it was rich, beautiful, and actually looked like it had been preserved for years. He wasn't entirely sure what to expect from this.

"This ship actually supports people, Arlong-san?" Conan asked.

"Hey! This ship has been in that crazy Deceken's family since the beginning, be respectful of pirate's ship when you'll be staying in it for a while." The fishman scolded.

"Ah. Gomen." Conan nodded his head.

"Whatever. Let's go." Arlong pulled the chain forward, making them board the ship. To Conan's surprise, once they got into the surrounding of the ship, he realized that they were in an air bubble. A giant air bubble, was actually surrounding the ship. The detective kept close to Arlong, seeing as how Decken's crew obviously didn't like him here.

"Captain Decken!" A loud voice called, interrupting Conan's thoughts. Noticing that his captor wasn't paying attention, Conan went to the bow of the ship and looked over, his eyes practically bugged out of his head. There was a huge fishman giant, that had his facial hair and head hair connecting through the outline of his face, bulgy lips, and bug eyes. He was shirtless, and was leading the ship around by a chain. "Captain Decken!" He yelled again.

"What is it? Wadatsumi?" Conan turned around and gaped at the sight. In front of him was a very tall fishman, with a catfish-like face, wild hair, four or six legs, and dressed like a drifter almost. The detective assumed this was the infamous stalker that Neptune told him about. The tall man curled his gotique mustache and noticed the boy. "Ah! You must be Conan Edogawa! Nice to meet you, I suspect!"

"You suspect?" Conan repeated with a raised brow.

"Of course! I suspect many things!" Suddenly, a bunch of disco lights appeared and the man started dancing. After a few awkward moments, Decken gave his usual pose; crossing his arms and pointing two fingers out.

Conan turned to Arlong and whispered. "Does he always do that?"

"You get used to it." The saw-toothed man submitted.

"I see." The boy sweat-droped.

"Captain Decken!" The giant fishman complained again.

"What is is Wadatsumi? Have people RSVP-ing the wedding yet?" The pirate captian asked eagerly.

"No captain! There's a weird shark swimming around the ship!" Conan gulped, seeing the shark swimming around.

"Ah! It's Shirahoshi's pet! Wonderful! I suspect!" Decken cheered and suddenly lifted a huge axe up. "Wonderful time to practice!" With sheer force, Decken threw the axe at the shark.

'NO!' Conan panicked. Luckily, the shark swam off and the axe missed. But before Conan knew it, the axe was coming straight back at him. A hand stopped the axe from slicing the boy's head in half. Conan stared at the sharp tip of the weapon, at his nose, his eyes widened at what almost happened.

"Whoops! I need to becareful! My bride's already here, and my mark's on her! I suspect!" Decken laughed at the boy's horror. "You see, I at the Mark-Mark fruit, which is why this ship is encased in this bubble; I can't breathe underwater like other fishman. I suspect!"

"Wait…you're saying, that those devil fruits even take a fishman's ability to function in the water?" Conan asked.

"Yep! No one's immune to it! I suspect!" He laughed.

"Interesting. So I'm here; release the princess." Conan ordered.

"OH! Bahohoho! You thought you coming here to get Shirahoshi's freedom? Hell no! You're here as the best man!" Decken laughed and Conan blinked. "It'll be perfect! A navy admiral's awaiting to marry us at the alter! And in exchange for total control over Fishman Island, all we have to do is hand over you! I suspect!"

"Wait! We're heading to the Navy Admiral?" Conan demanded.

"Indeed! Shirahoshi and I will finally be wedded, tying our destiny permanently together!" He grinned.

"At least give the princess an opportunity to say goodbye to her family." Conan growled.

"No way! We're eloping!" Decken declared. "Her family refuses to approve of us! And I'd rather see her dead than with someone else! I suspect!"

"You'd kill this woman for turning you down?" Conan scoffed. "So much for love."

"I DO LOVE HER!" He hoisted the boy up by his shirt collar. "Don't you dare say otherwise! I love Shirahoshi! I'll never find a woman as big and beautiful as her! Understand boy?" He grinned. "It's either marriage or death! And after that Shichibukai threatened to hijack the mermaid café, she was perfectly willing to come with us!"

'So that's how they got the princess.' Conan inwardly growled. "So why am I the best man? I don't even know you."

"Because! You're being given away too! Only natural you should be apart of the ceremony!" Decken explained. "Which reminds me! Throw him into the prison! And make sure hes got the proper attire for the event! This is to be a happy occasion, I suspect!"

"Ah." Arlong dragged Conan along into the interior of the ship. As they were walking ahead, Conan took in his surroundings, shocked at how huge the ark was. It reminded him of the old testament story, he truly believed that every species of animal could fit on this ship. Conan was snapped out of it, when he was pulled to an abrupt stop. "We're here." The door to the room was swung open, and Conan was thrown in. "Shashasha! Cheer up princess, you've got some company now!" Arlong slammed the door shut.

Conan groaned and struggled to get up, that blow from Arlong was still hurting. He coughed a little, and cringed when he noted the blood coming out his mouth; his internal biological structure was deteriorating, so that punch probably fractured several bones and organs. He was in pain but he was mobile, that was what was important. The boy looked around himself and noted that he was in a huge room; it was well-decorated with gold and pink wallpaper, had several treasure chests filled with pink rubies, had a window, and had a huge bed with a lump in the center of it. The boy blinked. This was a prison? It looked more like a rich girl's bedroom.

"A-Ano…" A quiet girlish voice got his attention. Conan walked up to the giant bed, only to realize that he was in a Jack-and-the-Beanstalk parody. Climbing up that bed would be like scaling a mountain. Suddenly a pair of giant blue eyes peered down at him.

"AAAUGH!" Conan was thrown back from the shock.

"AAAUGH!" The giant face screamed also and hid under the covers once again. "N-Not another scary person!"

After a few moments of silence and sniffling, Conan spoke. "Um…excuse me? But could you tell me what room this is?"

"I-It's the room Vander Decken-sama placed me in! It's terrible! Scary people keep coming in here, I want to go home!" She sniffed. "One scary person won't even leave!"

"Scary person?" Conan repeated but suddenly heard munching and slurping noises. Blinking, Conan went around to one of the sides of the giant bed, and saw a huge TV tray beside it. Inhaling his lungs, he called. "Hello?"

The munching and slurping stopped and Conan fell on his butt when he saw who was peering down at him. "Ah! Conan!" Luffy stretched his arm and lifted Conan up to where he was. "I was getting worried! What took you so long?"

"…What the hell are you doing?" Conan exclaimed. "And what do you mean what took me so long? You were supposed to crash the ship the second Arlong-san and I got on it! Where the hell were you?"

"Ah! The shark I was riding inside of got into a fight with the scary fish with teeth and a light bubl on his head. He ended up spitting me into a cannon of the ship, it flipped over and I got out! I didn't know how to find you, so I decided to just wait for you in here. I was really hungry too!" Luffy resumed eating the noodles and lettuce that he apparently started.

The detective boy stared with an open mouth when he saw how fat Luffy had become, and he was still eating! He was puffing up like a balloon and he was still eating! "That doesn't explain how you thought I'd meet you here! Who is that anyways?" Conan pointed to the giant hiding under the bed covers.

"Ah! Her name's Shirahoshi! She's big and a huge coward and crybaby, so I don't like her!" He smiled and kept eating. Conan also noted with a hanging jaw, that Luffy was once again, thin. Talk about fast metabolism! No screw metabolism, Conan was sure Luffy wasn't human!

"WAAAH! No one's said something so horrible to me! Luffy-sama, Little-Human-sama, please leave." She sniffled.

"Shirahoshi…" Conan's eyes bugged out of his sockets. "PRINCESS SHIRAHOSHI? That's the princess? She's freakin's huge!" Wow…when Decken said big woman, he was not kidding in the slightest.

"WAAAH!" Shirahoshi threw the covers off herself, revealing her physical image to the boy. She was about a hundred times Conan's size, had a huge bust with a skimpy yellow crop top, a royal-pink tail, long pink hair with a royal style to it, and huge blue eyes. "I've never been yelled at before! Please stop yelling!" She grabbed a thicker blanket and hid herself.

"This is the princess…?" Conan stared at the large image, remembered Otohime's image, then remembered the princes' images. One questioned entered the detective's mind that he wouldn't dare ask: how in the hell did Otohime give birth to her?

Meanwhile- Marguerite's Group

"This place truly is beautiful. Wonder what other kinds of places are on the Grand Line." The blonde said to herself.

"So you've never been off Amazon Lilly, Margie-chan?" Keimi asked. The green-haired mermaid found herself unable to say the Amazonian name properly, so the blonde let the mermaid nickname her. Currently, they, Pappug, and Hatchan were all heading towards the Mermaid Café to talk to Keimi's boss.

"No, I've never been off the island. I'm currently in training to be one of the Kuja pirates that goes to the outside world." Marguerite explained.

"What's it like there?" Keimi asked. "Is it strange to have nothing but women around?"

"Of course not. It's a natural, comfortable, and efficient environment that supports and nurtures itself. We do not need the help of men." The blonde replied.

"What about Luffy-kun and Conan-kun?" Keimi pointed out.

"I never said we couldn't be friends with them." The Amazonian replied. "How much further till this café anyways?"

"We're here!" Pappug cheered. Marguerite cringed at the sight of the building, for whatever reason it made her feel nauseous. Sucking it up, she followed her group inside.

"Madam Shyarly!" Keimi called out. Marguerite looked around herself in mild fascination, while Hathcan felt kind of embarrassed for some reason, and Pappug was just flat-out drooling. "Madam Shyarly!" She called again.

"Ara, Ara…don't be so loud Keimi-chan. It's disruptive to the customers." Marguerite turned to see a sharper-looking mermaid appear. She was very beautiful, rose-lips, and had a tail and hair as black as night. From the way Keimi bowed to her, Marguerite knew she was Keimi's superior. What took the Amazonian back was how much larger this Shyarly was than the average mermaid. "I see, come to the back then." Marguerite snapped out of her trance and followed the group. Shyarly made herself comfortable in her chair, and allowed everyone to sit in bubbles. "So what exactly do you need my help with Keimi-chan? Do you need more time with Hatchan-kun? What you went through was very traumatic."

"No! Thank you for asking Madam! But we actually need help with something else! Could you…" Keimi looked like she was having trouble asking.

"Could I what?" The shark mermaid glanced at the mer-people in the group, they seemed rather reluctant to ask whatever it was they wanted.

"We need your skills madam!" Marguerite stood and bowed for the group. "Please! Help us find the King's Diary!"

With Conan and Luffy

"Anyways, so that's what's going on." Conan reiterated when Decken had told him, to Luffy and Shirahoshi. After calming the princess down and explaining that the both were there to help, she relaxed slightly but didn't open up until Megalo was brought up. She was overjoyed to know her pet was okay, and was now openly talking with them. Conan noted the look of contempt on Luffy's face.

"Luffy-san…this admiral that's waiting for us…do you know him?" Conan already knew the answer, but he needed to make sure Luffy was right in the head before this went any further.

"Ah. I need to pay this bastard back for what he did to me and my crew. He destroyed Robin's island and had the nerve to bully her in front of me. I challenged him to a one on one and lost pretty badly. I'll beat him this time. Count on it!" Luffy said with a determined look.

"What about Vander Decken-sama? He's very strong. How will you fight him?" Shirahoshi asked.

"This Decken-guy sounds like a whimp! So no problem!" Luffy grinned.

"She's right; the admiral's not our only opponent. A shichibukai, named Donquixote Donflamingo's lurking around too. I'm sure you're strong Luffy-san, but we're pretty badly outnumbered and outmatched right now." Conan frowned. It was true; no matter how strong Luffy was, the pirate captain take on three opponents at once. They needed a plan of some kind.

Mermaid Café

Now the Amazonian understood why her group was so hesitant in asking for this favor. This woman hated her ability to see the future, for she normally only saw bad things. But after explaining the urgency of the situation, as well as why one of Fishman Island's greatest treasures needed to be dug up, Shyarly relented and agreed to help. The group gathered around as the shark-mermaid stared deep into her crystal ball, her eyes widened and she gasped. "I don't believe it!"

Meanwhile- Ryugu Palace

Jinbe was seriously starting to consider leaving his post now. He knew Luffy was strong as well, but he was badly outnumbered with what awaited him. But the boy specifically told him to wait four hours before going to the Sea Forest, so that's just what he'd do. He looked to Neptune and his sons, who looked anxious and defeated at the same time. Jinbe didn't blame them, they felt helpless. He was too, but tensed when he suddenly felt a presence behind him.

"Well, well…didn't expect to see another Shichibukai here." Luckily, they were at an isolated part of the palace, but that didn't mean shit with this man. Slowly, the large fishman turned to face the intruder.

"So you show yourself. What are you doing here…Donflamingo?" He hated that man's manic smile.

Meanwhile- Luffy and Conan

"Oi brat, let's go. We're here!" Arlong opened the door and raised a brow. Conan's back was to him, and the crying princess was actually out from her covers. She gave him a semi-defiant look. "Huh?"

"GUM GUM NO PISTOL!" Arlong was knocked out with one blow. "Yosh! All those fights on the Grand Line really toughened me up!" Conan raced over to the fishman, reached into his pocket, and put a tablet in Arlong's mouth.

"Huh? What'd you give him Conan?" Luffy asked.

"A sleeping-pill. This way he won't bother us for awhile." That was one villain down. "Now, Luffy-san, Princess Shirahoshi, you guys remember what to do?" He smirked.

"Un." Both nodded their heads vigorously.

"Okay, Luffy-san hide!" The rubber man reluctantly did as he was told. "Shirahoshi-san, you're cue!"

Sucking in a breath, she began. "AAAAAAAAAAUUUUGH!" Conan dropped to the ground in seconds, and Decken came running in the door with his men. But he quickly averted his eyes from Shirahoshi, telling himself he didn't actually see his bride before the wedding.

"What happened, my lovely Shirahoshi?" Decken asked.

"A-Arlong-sama tried to a-assault me, b-but Conan-kun saved me." She sniffled. "He zapped Arlong-sama with electricity I-I think."

"WHAT?" Decken screamed. "Guards! Throw him in the brink! He's a traitor I suspect!"

'What's there to suspect with that, really?' Conan inwardly twitched.

Review please! Also, don't give me crap about Decken's ship description, that was on purpose, you'll see why later on! I'm pretty sure you guys got my obvious hints already anyways, but just letting you guys know. Btw, keeping Decken in character's easy, but figuring out what he'll say next is a bitch! Remember to vote for your Black Organization character that you want to see appear in this fic. If you have any comments, questions, or concerns, PM or review me!