A Fire Princess and a Saiyan: a Dragon ball Super/Last AirBender crossover (I do not own the rights to either one of these franchises)

This is my third story that I'll be creating, it will feature a Alternative timeline version of Goku black and Azula as they journey to become the most powerful beings on earth, and making black have feelings for her. With that out of the way I want to make it clear that in this version of Goku black will have new transformations (Super Saiyan Rose Kaio-ken, Super Saiyan Rose 2, and my personal favorite Super Saiyan Rose 3) algo with the regular super Saiyan state as also having him aged down when he enters the avatarverse so it won't be creepy asf for the future romance. With all the said and done let the story begin. (For the last Airbender it will take place at the beginning of book 3 Fire)

Chapter 1

Alternate timeline 4b: Universe 7 future timeline: Earth

"So Saiyan's, you have actually sealed my future counterpart away. I'm impressed by your strategy. But I have evolved much more then I every dreamed of becoming and with it I have no use for him. He would've been useful in fussing together; yet now I will destroy you mortals for running my plans" As Goku black started to power up; the three Saiyan's their felt something happening to black yet familiar power as well. As he was finished powering up he ushered out words that made everyone tremble.

"KAIO-KEN". Was all he said as he used the Kaio-Ken with his Rose form; making him more powerful then all three Saiyan combined. "Surprised Goku? You shouldn't be! You knew that this body had that same technique that you used with the assassin Hit. But the difference is simple: A technique made by a God, shall be used by one as well" as he rushed into the fighters;catching Future Trunks by surprise as felt tremendous pain on his chest as Goku and Vegeta were also hit as well sending all three to the ground back to there base state as Black looked down on everyone there present; even his old master was there.

"How pathetic! A warrior prince, his son, and Goku. All on the ground after one hit from me. Haha haha! And you all want to know something else; I can go even further beyond then this state" as Black powers up even more vegeta looked over to goku with urgency. "Kakarot, I don't like our chances right now; but If we're going to beat him,we need to fuse" said Vegeta as this surprises him knowing that he hates the concept of fusion but knows it has to be done. "Alright Vegeta! I'm glad your willing to do this! Hey Shin through your potara earnings over hurry!" Said Goku as Shin took is off and threw them over to the duo he asked Gowasu something that was inching his mind every since the fight with Majin Buu; "hey Gowasu, when me and Vegeta fused last time; old Kai told us it would be permanent but we defused. How's that possible?" Said Goku. "It's only permanent if there's a Supreme Kai involved in it; had Future Zamasu not been sealed up he and black would've fused together in a permanent form since both were officially Supreme kais; since you two are mortals it will only last one hour" said Gowasu as Goku put on one on his right ear and Vegeta putting the other on his left ear.

As they were getting ready; they both ate a Senzu bean that restored there energy back. "Alright Vegeta, were only going to be fused for one hour okay?" "Let's get this over with". Said the both of them as they were pulled into each other and a bright light shined as black had entered his Super Saiyan Rose 2 state he looked up and heard a voice from behind. It was a mixed between Vegeta's and Goku's voice but into one body. "Alright!" Was he heard as a powerful Saiyan came behind the rubble with potara earnings on which surprised black for a moment but regained his composure and stared him down. "So this is the fused warrior Vegito I presume, impressive power you have warrior; yet once again you mortals continue to defy the gods and another sin that you have committed" said black as he prepared for the fight. "You called yourself strong, yet I call you a appetizer. You call yourself a god, yet you wear sin as a form that you stolen. We became one so I can destroy you. And this is VEGITO BLUE" as Vegito powers up instantly into blue as black looks up with not fear or surprise, but with confidence and eagerness to fight him.

"Don't assume such form will stand up against a true divine being!" As black fired his Kamehameha at him Vegito used only one hand to block his attack but with some effort put in as Vegito felt blacks power. Knowing that Vegito was powerful he used the Kaio-Ken with his form to combat the fused warrior. As he flew over to Vegito he gave him several ki blasts at him as Vegito counters it with his spirit sword and destroyed the ki blast; but only to be meet with a power gut punch that sent him flying into a few buildings. Vegito respondes with a instant transmission Big Bang attack which caught him by surprise and leaving Goku black with some bruises and blood. Hitting the ground; black responded with a Solar Flare that blinds Vegito and opens him up for multiple punches and kicks to his fused body before black blasts him away to the ground. "Not bad warrior, but still not enough to defeat me" said black as he headed over to finish Vegito but was meet with the spirit sword on his body as he saw Vegito creating the ki blade from his right hand. "Still thing that attack did anything to me? Come on give me a real challenge!" Said Vegito as black began to cough up blood but still powers up and meet him with a clash of their fists as both saiyans screamed into the sky with their power being felt by everyone who was present.

As they clashed; tradings punches and kicks along with various ki blasts, black powers up even more before revealing his final transformation: Super Saiyan Rose 3! With this power he began to have a edge over Vegito as he was meet with a powerful Kamehameha that sent him to several buildings before emerging out with his clothing damaged and having various bruises and cuts around him. "Alright black, I never thought I had to use this as but here it goes! KAIO-KEN TIMES 20! as Vegito powers up to even up with black as they continue to fight until Vegito hit his previous wound over and over again that he received early and made black cough up more blood and spit as black countered with his god slicer and left a big cut on Vegito. Seeing as his opponent is nearly finished he prepared his ultimate attack. "It's time to finish this black. FINAL KAMEHAMEHA!" As the powerful combined energy attack headed to him black responded with is own Kamehameha but powered up his Kaio-Ken to times 50 and meet Vegitos energy head on. As Vegito poured more power into the blast; black felt his time ring to activate and with little time to prepare he was pulled in as Vegito over power his blast and consumed him as he disappeared. Confident that Zamasu was destroyed he headed back to the group and told them what happened.

"Good news Trunks: Zamasu is no more. I..." was all he said as Vegito defused back into Vegeta and Goku with surprise looks on their faces! "Aww man, he couldn't finish it without defusing back?" "At least we defeated him before we defused otherwise we wouldn't stood a chance against him" said the both of them as Gowasu was finally relieved as his old apprentice was finally destroyed but now comes rebuilding trunks timeline. But no one realizes that Goku black survived the battle but was sent to a different dimension, a different universe, filled with different people with different powers.

Earth: Summer 100 AG: Fire Nation island

It has been three years for the formerly banished prince Zuko since he had seen his father:Fire lord Ozai. not only did his father finally gave him attention and praise for the first time but also created him with killing the avatar which he didn't do but also had a feeling he wasn't dead after all. He made his way towards his sisters room demanding to know why she did it. ""Why did you do it?" "You're going to have to be a little more specific." "Why did you tell father that I was the one who killed the Avatar?" "Can't this wait until the morning?" Said the two fire benders as Azula was sleeping when he came in. "It. Can't" knowing that he was determined to find answers she stared to explain "fine. You seemed so worried about how Father would treat you because you hadn't captured the Avatar. I figured if I gave you the credit, you'd have nothing to worry about". "You're lying." "If you say so..." said Azula as he was about to respond when both of them heard something falling from the sky; Iike a comet heading for the Royal plaza.

"Are you hearing that?" Said Zuko as he wandered what was going on. "It's definitely not Sozin's Comet, it's too early for it to arrive" said Azula as they both raced over to their father to meet him outside waiting for this object to arrive. "Captain, how big is this comet?" Said the fire lord as he wanted to see if it was a significant threat to him and his family. "No my lord, in fact is only a size of a human as both of his children rushed out to meet him. "Father, what is that comet doing?" Said Azula as she notice the "Comet" was moving on its own heading for the trio. "What ever it is Azula, it's determined to meet us" as all three prepare to launch a massive attack on it. As they did azula felt something off about the falling object, as if she felt someone. As soon as the object made impact it rolled over until stopping a few feet away from the royal family. "Now to finally destroy this useless..." was all he said before the smoke cleared away revealing a living being on the ground, wounded and unconscious. Everyone who was present was surprised and horrified as they saw this person stand back up. He was covered in bruises and scars all around him and various injuries as well but he suddenly ripped his top portion of his cloths off before screaming into the sky as this person suddenly changed his hair color from black into a yellow like color for a few seconds before collapse due to exhaustion.

Azula was the only one who neither felt fearful of this person but curious to who this person is. "Take him to get medical attention immediately! Said the Princess as four Fire nation soldiers carried this person way to get help as both Zuko and Ozai were surprised of this action. "Azula, never would I thought you were capable of bringing a stranger into the palace, let alone someone from the sky!" Was her father said with curiosity as he wondered what his daughter wanted from him. "Perhaps the universe decided to reward you father with a gift, knowing that we have destroyed the last airbender and taken over Ba Sing Se. Besides we don't know his true potential so I wanted him to recover and have him destroy the others as well" said the Princess who earned her fathers approval and Zuko's surprise reaction from them as he headed to check on this mysterious person.

It has been two days since Goku Black arrived and still unconscious as he was replaying the memories he had from the fight; how he was sucked into the portal as he was taking the fused warrior attack head on while being transported to a different place. He started to move from his bed he was on as he started to talk. "What happened to me, where am I?" Was all black said as he noticed something different about him. As if he sounded younger. He rushed over to a big mirror and to his horror he saw that he became a teenager! "What!?" As he began to look around he felt his time ring was still on his hand along with his potara earrings. He felt slightly better but still can't believe he was now a teenager!

"Curse this body! It must be a side effect for me to travel to this particular world. No matter. I will soon go back and defeat those mortals again. But for now I think I will enjoy myself here and explore what this world has to offer to me." He proclaimed as he heard several footsteps headed to his room and saw a door open revealing several soldiers of unknown forces confronting him. "By the order of Fire Princess Azula, you are to come with us to meet her" Said one of the soldiers and though black could take them on he was curious to know who this Princess is. "By all means, I'm curious to know who this princess you speak of; though tell me more of where I am though before I meet her" said black as the soldiers accompanying him to the Princess he looked around to see various artwork of people bending the element Fire from within themselves as this made him even more curious. "So good soldier, tell me where I am. I see that some of your people have the ability to bend a element and from what I can piece together I'm in the royal palace if I'm meeting a princess" said black as one of the soldiers began to talk. "You are correct sir, this is the fire nation and some of us were born with the ability to bend the elements." "Impressive, most impressive indeed." Was all black said with a smile as he never thought a world where mortals can bend the elements. He soon walked into a room with a mysterious fire bender that's producing blue flames from her as she was sparing with several other people. As one of the soldiers started to explain who she was; he already knew that she must be the princess they were talking about. "Impressive by her, perhaps I should introduce myself to her."

As Azula was finishing up her lesson two elderly women started to explained her impressive performance of today; "you have defeated three of the best fire benders of the army has to offer your highness" said one of them as the other began to voice as well; "yet one of them had managed to get past you and strike you, and your hair was off as well, almost perfect you are."Said the other as black was able to determine that these old women were twins and were helping the princesses also pointing out her mistakes as well. "Almost isn't good enough" said Azula as he wanted perfection and knew she had to do it better. Then the mysterious stranger that she requested started to walk up to her and stared to explain what he wanted. "Then by all means why waste your skill on these lowlifes and have yourself a real challenge; your highness!" Surprising everyone in the room as he was challenging a firebender prodigy and a royal member of the family. "Very well stranger, guards you're excused. Before we start what is your name oh mighty one?" Said Azula which caught him momentarily off guard. He could say he was Zamasu but he wasn't sure if that would work. Instead he decided to embrace the host bodies name and legacy for now. "I am a powerful warrior, yet I'm called Son Goku your highness. Do not expect this fight to be close child" as the two warrior prepare to face off she doesn't know who he is or where he came from yet.

That's the end of this chapter guys, if you liked it give it a review and I'll be posting more chapters soon. Btw Goku blacks age in this story is 15 years old to make the romance possible. Until next time it's been chaoskeeten.