I don't know if it's really important to do it since this is clearly a fanfiction, but here

Disclaimer: I do not own One piece.

I wanted to know if you wanted me to add later in the story (with flashbacks) how the crew, Sabo and others died. Some will be necessary for the plot, but I won't write all of them if you are not that interested in finding out.

Purupurupurupu... Purupurupurupurupuru... Gotcha!

"Ace, Sabo! How are you both doing? How is your time in the grand line so far?" A fifteen year old soon-to-be pirate king chanted happily as he had stopped training to talk to his two brothers.

"Hey! It's good to hear your voice Luffy! I've been quite busy with the revolutionary army, I'm sorry we haven't gotten to talk more before!"

"Yeah, you're right. Hey, Sabo, I have a question for you. Does anything seem odd to you?"

"What are you talking about?"

"Well, some of my past enemies didn't have the same weapons or devil fruit as before for starters."

Luffy frowned before his eyes widened in realization. "That would be the butterfly effect."

"What Now?"

"Robin told me something about it we first discovered the time-travel thing. She told me small actions changing their course can change history. It says a butterfly flapping his wings could create a hurricane miles and miles away. If this is correct, a small change in our actions or the one of anyone who is back can change the world we knew to something completely different. Doflamingo had the monopoly over all of the weapon black market. If he was brought down early, then all of the illegal weapon market would be removed or dealt by completely different people, for better or worse. If I would have to guess, I would say Law did, thus making the world totally different."

"Well, I saw sea stone in east blue of all places, so be careful when you set sail." Ace said, a little worried.

"Ace, I wanted to ask, what happened with blackbeard?"

"He's in another division and has been moved to a secondary ship. We have his fruit and we didn't show it to anyone else. Me, pops and Marco are still deciding who we are going to trust it with."

"Whoever you give it to, you must be assured to have trust in this person, enough to bet your life on it. Someone with the slightness ill intention can become the most fearful devil in all seas and even someone with a heart of gold can be tainted."

"W-what do you mean Sabo?" Luffy asked nervously.

"The Yami Yami no mi is the darkness fruit. We still don't know if it can corrupt the mind of the user. That is why we need someone trustworthy who will be strong enough to bear it's power without falling into darkness himself."

"What about you, Sabo?"

"What about me?"

"You could have it." Luffy said with confidence.

"...What?"

"Luffy is right. The only people I would trust with my life are Luffy, Pops, Marco and you, Sabo. You are the only one without a devil fruit, sooo the choice is clear if you ask me. I'll talk about it with them, I'm sure they will agree."

"Wait a second! I didn't- He hung up... really?" Sabo sneered in in annoyance.

"Maybe it's his narcolepsy?"

"You know as much as I do that it isn't."

"Well... Don't worry, We meet in two years, you still have time to mentally prepare."

"Even if I say no, I have a feeling I don't have a choice with two D's as my brothers."

"Wow! Sabo I'm impressed! You realized it faster in this timeline! Shishishishi..."

"I have to go... See you in two years!"

"See ya!" Luffy chuckled and hung up. The young pirate king ran back in the forest and continued his training. The kind of training who would put Zoro's to shame. He would often come back to Dadan's hut with the gigantic pray he hunted and fall asleep immediately. He didn't even bother waking up to eat, he simply ate while still sleeping like he always did after big fights since Enies Loby.

He continued this infernal routine until it was time for him to finally set sail. Packing his stuff on the small boat, the now seventeen year old boy grinned. He wore a red long sleeve shirt, black pants and a captain coat thrown over his right shoulder with one hand. His muscles were a lot more refined than they had been the first time he set sail. Then, standing in the tiny boat with only a barrel and a personal bag, not looking behind to the island and family he left behind him, not glancing more than once at the local sea monster he defeated in one blow, looking straight ahead as his adventure started, once again, in the peaceful sea of east blue, home sea of both the old and the soon-to-be pirate king, he set sail.

Seeing the whirlpool coming closer, Luffy jumped in the barrel once again with his coat in his bag. He was pulled aboard the same cruise ship and rolled below deck when the ship was raided. The barrel was pushed around by a pink haired boy when other pirates came to have a 'sip' of wine.

Luffy came out of the barrel shouting about his good night sleep. Turning to the pink haired boy, he smiled and chuckled. "What are they doing on the ground? Your friends will catch a cold!"

"You knocked them out!"

"Oh. Forgot about that. Can you show me were the pantry is? I'm hungry!" Luffy started to follow the shaking boy in front of him as they entered the pantry and started eating. He looked exactly like Coby, only he had square glasses and seemed more injured than last time. The pirate king noticed pretty quickly the blood on his shirt and the scraps on his face. In a more positive way, he seemed to have at least a bit of muscles, unlike last time. "Who are you by the way?" Luffy turned to face the boy and smirked. "Monkey D. Luffy. The man who is going to be the pirate King!"

"Pirate king?" Coby started. He was about to say how it was impossible, but kept his mouth shut as he looked at the charismatic figure in front of him. He looked so confident that Coby started to actually believe it was possible for this guy to do it.

"What's your name?" Coby looked up to the raven haired straw-hatted teen. "C-Coby..."

"Well, Coby, do you have a dream?" The smaller boy looked down. "Yes but... I wont achieve it..."

"A dream is not about achieving it or not, it's about doing anything you can to achieve it. Putting your life on the line. If I die trying, then I'll die. As simple as that."

The pink haired boy looked up with a determined look in his eyes. "Do you think I can do it? Luffy, even if this will make us enemies one day, I want to become a marine!"

"Shishishi... With that kind of resolve, I believe you could be an Admiral some day!" Coby smiled.

"Then I'll do it. I will become a marine and catch bad guys like Alvida!" The door crashed and, from the other side entered a fat woman who swung her flail around like it weighed nothing. And it probably did, in comparison with her own weight.

"Who are you going to catch, Coby?" She walked slowly toward the two of them, making the floor creak under her with each step. The boy was shaking, but when he looked at Luffy's confident expression, he stopped. looking down, he took a staff-like piece of wood that had flown his way when she entered and started running toward her.

"You! I'm going to catch your ugly ass and become a MARINE ADMIRAL!" He swung the staff to her head, but it broke once she swung her flail at it. The pink haired boy flinched but didn't step back.

"You have a strong will Coby..." Luffy smirked as he grabbed the boy, broke the sealing and jumped through. Alvida came up on the deck after them and shouted angrily. "Who are you? you don't look like that pirate hunter Roronoa Zoro... Are you here for my bounty?"

"Zoro..." Luffy said with a smile.

"And YOU! YOU WILL REGRET YOUR WORDS BRAT!" She yelled as she started to swing her flail around. Before it could hit Coby's head, Luffy stopped it with one hand and crushed it without using haki or any other technique, only his raw strength. Everyone on the ship had their eyes wide and looked at the straw hatted kid in disbelief.

"Goodbye!" Luffy chanted happily as he sent her flying, being careful not to use his devil fruit yet. He wanted to test his bare strength before starting to use all of his awesome new techniques, and didn't want to do over kills on east blue pirates. The rest of the crew sweat dropped and backed away in shock, knowing they didn't have a chance. The future pirate king went to grab his bag and came back next to Coby.

A woman with orange hair tied up in a high ponytail and a black bandana jumped in front of them. She wore a blue shirt and black mid-long pants and a red sash. "Luffy!" She chanted happily. Luffy looked up to her and bit his lips before smiling and looking her in the eyes with a slight guilty expression.

The orange haired woman jumped in the pirate kings arms, crying and laughing at the same time. "I missed you and the crew so much!" She stepped back and took a look at Luffy while drying her tears. "You've become quite muscular, I must say!" She giggled.

"You look stronger than the first time too! Lets go find Zoro!" Luffy replied eagerly.

"Zoro? Roronoa Zoro? Are you seriously thinking about recruiting this pirate hunter? He is said to be evil!" Coby shouted nervously.

"Yep." Was the only reply he received by the two pirates who had stopped their discussion for a second.

"Wait, is that-"

"Yeah, this is Coby. Coby meet my navigator Nami!" Coby stared at the two pirates, shook Nami's hand and sat back in the boat, looking quite stunned. The little trio went back to the sea, evading the marines who happened to come by to take care of what was left of Alvida's crew.

"Did you notice the changes too?" Nami asked nervously.

Luffy grinned and chuckled. "It would be boring to live the exact same adventure twice!" This managed to calm the navigator a bit, but Luffy's earlier expression still bugged her to the core.

When they approached Shell town, a woman with dark blue long hair tied in a braid was sitting angrily on the dock she had a white shirt and a blue sash around her waist and black pants. She was carrying the Wado Ichimonji. When she saw them coming closer, she frowned, sighted and smiled.

"Are you Monkey D. Luffy?" She said, pointing at the raven haired captain.

"Yes, who are you?" The woman smiled. "I'm Zoro's friend. He got himself captured at the marine base and he told me to wait for a straw hatted kid at the docks named Monkey D. Luffy. My name is Kuina."

The three people on the small boat docked and, with Kuina, made their way to the marine base. "Zoro said you are Sabo's brother, but you two don't look alike."

"We are sworn brothers- Wait, you met Sabo? That's cool! So, Kuina, are you going to join my crew?" She frowned.

"Well, Zoro said he would. He also said that at this point, I wouldn't have much of a choice."

"I won't force you to join! I don't do that!" Luffy pouted, Earning a few chuckles from Nami. "What about Chopper? You didn't stop bugging him until he joined. Or Sanji? He said you wouldn't leave the Baratie without him pretty much. I know... Zoro? He said it was blackmail at first." She laughed.

"I just convinced them with... my stubbornness!"

"And Franky?"

Luffy's face went pale for a moment as he recalled how Franky had joined. He looked away for a second.

"Those... don't count?"

"Don't count? it's almost half of us!" He rubbed the back of his neck and looked back at the swordswoman. "Will you join?"

Kuina smiled and accepted Luffy's offer.

When they arrived at the marine base, Luffy jumped over the wall and casually walked to his first mate while the two woman were chatting right behind him and Coby was nervously sitting on the wall.

"Do you need any help with the ropes?" Luffy asked teasingly.

"Nah." Zoro moved slightly and broke free. They entered the base, which was strangely squared shaped, and walked around aimlessly before stopping at a room that was written "My room" on the door. They entered and took Zoro's swords, the one's that he had bought in Loguetown with the addition of one of less importance. After a few minutes of getting lost, they managed to get on the roof, where all the marines of the base, except the one's who had been knocked out on their way there, seemed to be. They both looked up to the big statue they were trying to lift and the man who seemed to be guiding them/shouting and yelling angrily at them. After a few minutes, they came out unscratched with Zoro's swords as all the marines cheered them, told them good luck and the statue on top of the base was in pieces.

Shortly after, Coby had joined the marines and the four pirates made their way back to the dock.

So here is the next chapter. I hope you enjoyed it! This story will be canon divergent, but I will still follow the main plot line. I read some time travel fic and just wanted to try something a little different. I am sorry to the people who wanted it, but Luffy won't have a harem because I am not fan of this kind of story and I prefer writing something that I like and am proud of over something that I try to write even if I don't like it and end up messing it up.

For Luffy's pairing, I actually had two main ideas to what direction my story would take. One involved Luffy in a pairing and the other was based more around the effect of time travel. I know a lot of you wanted a Luffy x Robin fanfic, but I think I will take my second idea because I have more ideas for this version.