Avengers X Kingdom Hearts - Endgame

Disclaimer: I do not own these characters or properties. Marvel Studios is owned by Disney Entertainment and Marvel Comics. Kingdom Hearts and their characters are jointly owned by Disney Interactive and Square Enix. The Sonic the Hedgehog franchise and their characters are owned by SEGA. This work is pure fan fiction and how both worlds of Kingdom Hearts and the MCU would mix together. There may also be cameos from other franchises that pop up. Please Enjoy.)

Chapter 22: Heroic Resonance On The Sanctuary

***SANCTUARY II - HOLDING CELLS***

Aqua and Nebula were both surprised and relieved as their mysterious savior untied them from their bounds and removed the metal muzzles that had silenced them. They looked up at the young man, taking in his appearance with curiosity. He had a slim but well-built figure, and his blue eyes seemed to shine with a powerful light that Aqua could sense from her own heart.

He wore a periwinkle-colored jacket with the 'Capsule Corporation' logo on the left sleeve, and a long red scarf was wrapped around his neck. His dark gray pants and pale-green boots with black tips completed his attire. Underneath the jacket, he donned an olive-green shirt adorned with patches on the shoulders and forearms, giving off a hint of military flair.

As the hero entered the cell and approached Aqua and Nebula, they noticed that his hair and eyebrows were an unusual shade of blue. The young man exuded an air of confidence and determination, which made Aqua wonder who he could be and what brought him to their aid.

With the bounds removed and the metal muzzles discarded, Aqua and Nebula felt a newfound sense of freedom. They exchanged glances, silently acknowledging their gratitude to their rescuer. Aqua couldn't help but feel a sense of familiarity with the young man, as if she had met him before, but the memory eluded her.

The hero spoke, his voice calm and reassuring, "Are you both alright?"

Aqua nodded gratefully, "Thank you for saving us."

Nebula also expressed her gratitude, "Yeah, thanks. But who are you? And how did you find us?"

The young man smiled, a hint of mischief in his eyes, "Let's just say I have my ways. As for who I am, you can call me Trunks."

"My name is Aqua." The Keyblade Master said softly.

"I'm Nebula." The daughter of Thanos said, with a metallic tone in her voice.

"Great to meet you. I know this may be hard to believe," Trunks continued, "but I'm from a different, alternate timeline. It's strange, but I sensed your presence and knew you needed help. That's why I'm here."

Aqua and Nebula listened to Trunks' explanation, still processing the fact that they had been rescued by someone from another timeline. But they could feel his sincerity and the strength of his heart, and that was enough for them to trust him.

"Thank you, Trunks," Aqua said, "We are in your debt."

Trunks smiled, "No need to thank me. It's what heroes do, right?"

With that, Aqua and Nebula nodded, grateful for the unexpected help. They knew that they had found a valuable ally in Trunks, and together, they would face whatever challenges lay ahead.

***SANCTUARY II - CORRIDORS***

Trunks led Aqua and Nebula through the narrow winding corridors of Sanctuary II, navigating with confidence as if he knew the ship like the back of his hand. Aqua couldn't help but admire his skills and the way he moved with such grace and determination.

As they walked, Aqua couldn't help but feel a sense of hope growing within her. She had been through so much, but knowing that there was someone like Trunks by her side gave her a newfound strength. She looked at him and asked, "What's the plan to escape this ship and get back to our timeline?"

Trunks turned to her with a knowing smile. "Don't worry," he said, "The opportunity will arise for your escape."

Nebula raised an eyebrow. "What do you mean?" she asked.

Trunks chuckled but shook his head. "I can't say," he replied cryptically, "Knowing too much could disrupt the delicate balance of time. I shouldn't even be here, but destiny has a funny way of showing itself."

Aqua and Nebula exchanged curious glances, but they trusted Trunks and knew that he had his reasons for keeping certain information to himself. They continued following him through the ship, their anticipation building with each step.

As Trunks, Aqua, and Nebula turned the corner, they found themselves face-to-face with Proxima Midnight and Corvus Glaive, two formidable members of The Children of Thanos. The two stood tall and imposing, their weapons at the ready, demanding to know who this intruder was and why he was taking away their prisoners.

Trunks smirked confidently, not at all fazed by their intimidating presence. "Well, well," he said, "Looks like Thanos sent his lackeys to deal with me. I suppose I should be flattered."

Proxima glared at him, her spear at the ready. "You won't be flattered for long," she hissed. "We don't take kindly to trespassers."

Proxima and Corvius exchanged glances, a hint of uncertainty in their eyes. This newcomer seemed to be on a different level altogether.

"Who are you, and what business do you have interfering with our master's plans?" Proxima demanded, gripping her spear tightly.

Trunks chuckled, "I'm just a guy passing through," he replied, "but I couldn't stand by and watch innocent people being held prisoner. Now, how about you put down your weapons and let my friends go? Otherwise, things might get messy."

Corvus Glaive's eyes flashed with anger. "You dare to threaten us?" he growled, "You'll regret crossing the Children of Thanos!"

Trunks couldn't help but smirk, his confidence unwavering. "Well, if you want to know who I am," he said, "you'll have to come to me and find out."

He swiftly reached behind his back and pulled out a gleaming sword, its blade shining in the dim light of the corridor. Aqua watched him closely, sensing his light growing stronger, but also noticing an aura of power that seemed to be skyrocketing around him. It was as if he was tapping into a well of strength beyond what she had seen before.

Proxima Midnight and Corvus Glaive exchanged glances, undeterred by Trunks' bravado.

"You think you can challenge us?" Proxima sneered. "You're nothing but an insignificant worm compared to the might of The Children on Thanos.

Trunks didn't flinch. "We'll see about that," he replied calmly.

Trunks nodded in acknowledgment as Aqua summoned her Keyblade and stood by his side. Nebula, too, joined them, ready for whatever lay ahead. Aqua's words reassured them all, and she could feel the strength of their bond as heroes united against the darkness.

Trunks smiled at Aqua's display of courage and determination. "Good to have you both by my side," he said. "Together, we can overcome anything."

Aqua held her Keyblade aloft, it's brilliant light casting a warm glow in the dark corridor. "The power of the light will guide us," she affirmed, her voice steady with resolve.

Nebula, despite her stoic demeanor, felt a newfound sense of camaraderie with these unexpected allies. "I may not be a hero like you, but I know how to handle myself in a fight," she said, clenching her fists.

***AQUA, NEBULA & TRUNKS v PROXIMA MIDNIGHT & CORVUS GLAIVE***

The narrow and dimly lit corridors of Sanctuary II echoed with the clash of battle as Trunks, Aqua, and Nebula confronted the formidable foes, Proxima Midnight and Corvus Glaive. Trunks wielded the legendary Z Sword, a massive and imposing weapon that he swung with incredible strength and precision. Aqua brandished the Rainfell Keyblade, its elegant design concealing its deadly power, while Nebula relied on her enhanced combat skills and cybernetic enhancements.

Proxima and Corvus were relentless in their attacks, striking with deadly accuracy and coordination. Proxima's spear lunged towards Aqua, aiming to skewer her, but the Keyblade Master swiftly cartwheeled out of harm's way. With a graceful twirl, Aqua unleashed her Bubble Blaster Shotlock Command, releasing a barrage of magical bubbles that homed in on her targets.

Corvus swung his glaive with tremendous force towards Nebula, but she swiftly sidestepped the attack, moving with an agility that seemed almost unnatural. She retaliated with a swift and precise strike, delivering a powerful blow to Corvus' side.

Meanwhile, Trunks was engaging Proxima head-on, blocking her strikes with the Z Sword and countering with his own devastating blows. With a focused concentration, he gathered his energy and fired a powerful ki blast that sent Proxima flying across the corridor.

But the Black Order members were not so easily defeated. Proxima recovered quickly, springing back into action with a newfound ferocity. She launched herself towards Aqua, her spear whirling dangerously. Aqua deftly parried the strikes, the clashing of weapons creating sparks that illuminated the dim corridor.

Nebula, too, was engaged in a fierce duel with Corvus. His glaive was a formidable weapon, and she found herself having to draw upon all her skill and strength to keep up with his relentless assault. Their blades clashed in a dazzling display of skill and power.

In the midst of the battle, Aqua and Trunks exchanged a knowing glance, their connection as warriors strengthening their resolve. They moved with a synchronicity that spoke of their shared experience and purpose.

With a nod, Aqua and Trunks launched a coordinated attack on Proxima and Corvus. Aqua's Bubble Blaster merged with Trunks' ki blast, creating a devastating fusion of light and energy that engulfed the Black Order members, sending them hurtling backwards.

But the battle was far from over. Proxima and Corvus regrouped, their determination undeterred. Proxima's spear glowed with an ominous energy as she lunged towards Aqua, her attack imbued with dark power. Aqua deflected the strike with the Rainfell Keyblade, but the force of the blow sent her skidding back.

Trunks charged forward, his Z Sword poised for a powerful strike. He brought the sword down with all his might, clashing with Corvus' glaive. The two warriors locked eyes, a fierce determination evident in both their gazes.

As the battle raged on, the heroes' strength and resilience were put to the test. But they fought on, their hearts filled with a burning determination to protect the universe from the darkness that threatened it.

Aqua cartwheeled out of harm's way once more, narrowly avoiding a strike from Corvus' glaive. She countered with a flurry of fast and precise strikes, her Keyblade dancing through the air like a graceful ribbon.

Nebula, too, was relentless in her attack, her enhanced strength and combat skills proving to be a formidable combination. She moved with a fluid grace, her movements calculated and efficient as she targeted Corvus' weak points.

Trunks' power surged, and he unleashed a devastating barrage of ki blasts, sending shockwaves through the corridor. The force of the blasts sent Proxima and Corvus reeling, but they refused to yield.

In a final push, Aqua, Trunks, and Nebula launched a combined attack, their weapons and skills working in perfect harmony. The Rainfell Keyblade, Z Sword, and Nebula's enhanced strikes merged into a blinding display of light and power.

The force of their attack overwhelmed Proxima and Corvus, sending them crashing into the walls of the corridor. The impact created a thunderous rumble that reverberated through the ship.

As the dust settled, Aqua, Trunks, and Nebula stood triumphant. Their enemies were defeated, but the battle had taken its toll. The heroes were breathing heavily, their bodies aching from the intensity of the fight.

***END OF BATTLE***

As the dust settled and the echoes of battle faded, Trunks turned to Aqua with a small smile. "Nice moves with that Keyblade," he said, admiration evident in his voice. "I've heard legends about it and the power it holds."

Aqua returned the smile, her aqua-colored eyes sparkling with appreciation. "Thank you," she replied. "The Keyblade is a weapon that connects to the power of the heart. It allows me to channel my light and protect those I care about."

Trunks nodded, impressed by her explanation. "It sounds like a powerful weapon," he said. "And you certainly know how to use it."

Nebula, who had been observing the exchange, couldn't help but smirk. "Looks like someone's impressed," she teased, raising an eyebrow playfully.

A faint blush tinged Aqua's cheeks as she tried to hide her amusement. "Well, the same could be said for your sword," she said, changing the subject. "It's quite formidable."

Trunks looked down at the Z Sword, a sense of pride swelling within him. "This is the Z Sword," he explained. "It's said to be one of the most powerful swords in the universe. I've trained with it for years to harness its full potential."

Nebula couldn't resist adding her own playful comment. "You two seem to have quite the admiration for each other's weapons," she said with a smirk.

Aqua and Trunks exchanged amused glances before both bursting into laughter. It was a brief moment of levity in the midst of their serious mission, and they welcomed the chance to share a lighthearted moment.

As they turned the corner into the dark and dingy corridor of Sanctuary II, Aqua's heart skipped a beat.

"Oh, crap," she exclaimed, her hand instinctively patting her hand where her Time-Space GPS should have been.

Trunks looked at her curiously. "What's up?" he asked, noticing the panic in Aqua's eyes.

Aqua quickly explained, "We need our GPS devices to get back home and warn our friends. Without them, we can't travel!"

Trunks smiled reassuringly. "You mean these?" he said, reaching into his pocket and pulling out both Aqua and Nebula's Time-Space GPS devices.

Aqua's eyes widened in surprise and relief. "You had them all along?" she asked incredulously, a mix of emotions flooding her.

Trunks shrugged playfully. "Oops, my bad," he said with a mischievous grin. "I didn't realize they were important until you mentioned them."

"You are unbelievable," Nebula said, feigning exasperation as she snatched her GPS device back from Trunks.

Aqua playfully nudged Trunks with her elbow. "You better not be hiding anything else from us," she teased, though the worry in her voice was replaced by a sense of lightheartedness.

Trunks held up his hands in mock surrender. "I promise, that's all I've got," he said, his smile never wavering. "I'll make sure to keep a better eye on things from now on."

Aqua and Nebula slipped on their Time-Space GPS back onto their wrists, the knowing feeling they could finally get home to their time and warn their friends.

Trunks raised an eyebrow, genuinely curious. "GPS device, huh? Sounds like some high-tech stuff," he remarked, scratching his head. "I thought they were just cool watches or something."

Aqua smiled, understanding his confusion. "Well, they are more than just watches," she explained. "They are advanced devices that use quantum technology to access the Quantum Realm, where time and space intersect. From there, we can enter Time Vortexes to travel to different points in time."

"Quantum Realm, Time Vortexes... this is some heavy stuff," Trunks said, clearly fascinated by the concept. "Back in my time, I just used my mom's time machine."

Nebula looked at Trunks with a blank expression on her face. "Your mom has a time machine?" she asked, incredulous.

Trunks nodded, a small smirk on his lips. "Yeah, she's pretty amazing," he said proudly. "She's a scientist, and she built a time machine to help us fight against powerful enemies and save the world."

Aqua and Nebula exchanged glances, both impressed and intrigued by Trunks' revelation. "That's incredible," Aqua said, genuinely impressed. "So, how far in the future are you from?"

Trunks went quiet for a moment, his smile fading slightly. "I... I can't say," he replied cryptically. "It's complicated, and revealing too much could disrupt the timeline."

Aqua nodded, understanding the gravity of the situation. Time travel was a delicate matter, and altering the past or revealing too much about the future could have dire consequences.

Nebula, too, seemed to grasp the seriousness of the situation. "You're right," she said solemnly. "We need to be careful with this kind of power."

Trunks looked at both of them, his expression serious. "Believe me, I know," he said. "Time travel is a powerful tool, but it can also be dangerous if misused. That's why I'm careful not to interfere too much with the timeline."

Aqua and Nebula nodded, appreciating Trunks' caution and wisdom. They knew that they couldn't take their mission lightly, especially with powerful enemies like Thanos and Mephiles involved.

"So, how did you two end up hostage on this ship, and stuck in the past?" Trunks asked, looking at his two new friends.

Aqua and Nebula exchanged glances, grateful for Trunks' timely arrival. "We were on a mission to collect the Reality Stone, one of the Infinity Stones," Aqua explained. "We needed it to undo the snap caused by Thanos and restore those who were lost. But before we could retrieve the stone, we were ambushed and kidnapped by Mephiles. He brought us here to Sanctuary II, and we've been prisoners ever since."

Trunks listened intently, his brow furrowing with concern. "Mephiles, huh? He's a dangerous opponent," he said, clenching his fists. "I've heard stories about him and his manipulative ways. Looks like he's causing trouble in more than one timeline."

Aqua nodded, a somber expression on her face. "Indeed, he is," she said. "Mephiles is a powerful enemy, and we've encountered him before. But we won't back down. We're determined to stop him and put an end to his sinister plans."

Nebula chimed in, her voice determined. "We can't let him get away with this."

Aqua's confident smile returned and nodded in agreement with Nebula. Looking at Trunks, she held up her hand showing off the Time-Space GPS.

"That's where this handy device comes in," she said. "It'll take us back to our time, and we can regroup with our allies and come up with a plan to stop Mephiles and Thanos."

"Wow, those devices sure sound incredible. I must report this back to mum when I return home."

Nebula smiled and looked towards Trunks. She could sense such a powerful being inside and out, he was a force of good and a beacon of light in these turbulent times.

Aqua felt a glimmer of hope, knowing that they had a way to return to their timeline and continue their fight against the darkness. But she had one more question for Trunks.

"How did you find us?" she asked. "We're grateful for your timely arrival, but how did you know we were here?"

Trunks smiled, a hint of pride in his voice. "It's all about sensing energy and power levels," he explained. "I have a special ability to sense people's ki and energy. When you and Nebula were in distress, I felt your strong power level calling out to me. It led me here, and I'm glad I came to help."

Aqua and Nebula exchanged impressed glances. Trunks' ability to sense energy and find them in the vastness of space was truly remarkable. They were grateful to have him on their side, and they knew that with his help, they stood a better chance of defeating Mephiles and saving the universe.

Nebula raised an eyebrow, intrigued by Trunks' abilities. "Ki and energy, huh? That sounds interesting," she said. "So, you're like a living radar or something?"

Trunks chuckled. "You could say that," he replied. "It's a skill I picked up during my training to become a warrior. It helps me sense danger and locate people in need."

Aqua nodded, understanding how such a power could be invaluable in their line of work. "That must be quite useful," she said. "It's certainly a unique ability."

Trunks shrugged modestly. "Yeah, I guess it comes in handy sometimes," he said. "But it's not just about the power. It's about using it to protect others and make a difference."

Aqua smiled, touched by Trunks' sense of purpose. "You're right," she said. "Being a hero is about using our abilities to help others and make the world a better place."

Nebula nodded in agreement. "And that's exactly what we're going to do," she said, with determination in her voice. "We're going to stop Thanos and Mephiles, undo the snap, and bring back everyone who was lost."

Trunks smiled warmly at Aqua and Nebula. "You two get going back to your timeline," he said, his tone filled with determination. "I'll handle Mephiles and make sure he doesn't cause any more trouble."

Aqua nodded, her eyes filled with gratitude. She gently took Trunks' hand in hers, causing him to blush slightly. "Please be careful," she said softly. "And do come and visit us on your next time-travel adventure. We'd love to see you again."

Trunks nodded, his heart skipping a beat at Aqua's touch. "I will," he promised. "You can count on it."

Nebula, on the other hand, showed her appreciation in her own way by punching Trunks lightly in the arm. "Thanks for the help," she said with a smirk. "And don't be a stranger to the past, okay?"

Trunks chuckled, rubbing his arm where Nebula had hit him. "I won't," he said, playfully returning her smile. "Take care of yourselves and make sure to reverse that snap caused by Thanos. The universe, past, present, and future all depend on it."

With that, Aqua and Nebula activated their Time-Space GPS devices and disappeared into the Quantum Realm, heading back to their own timeline in 2019. Trunks watched them go, a mixture of pride and worry in his heart. He knew they were strong and capable, but he couldn't help but be concerned for their safety.

Turning his attention back to the task at hand, Trunks steeled himself for the confrontation with Mephiles. He knew it wouldn't be an easy battle, but he was determined to stop the sinister entity and prevent any further damage to the timeline.

***DEEPER INTO THE SHIP***

As he made his way through Sanctuary II, Trunks could feel the weight of his responsibilities as a time-traveling hero. He knew that the choices he made in the past could have far-reaching consequences for the future. But he also knew that he couldn't stand by and do nothing when there was evil to be fought and lives to be protected.

As Trunks moved around the Ship to seek out Mephiles, he knew the darkness from that foe was getting stronger. Every henchman he took out and every step closer, he could sense Mephiles' power level increasing. However, Trunks felt something nearby - something familiar to him.

Trunks turned back and found Mobius standing there, leaning casually against a nearby wall. He raised an eyebrow at the Time Variance Authority agent.

"How long have you been watching me?" Trunks asked curiously, a small smile playing on his lips.

Mobius chuckled, tapping the side of his nose playfully. "Long enough to know when flirting gets weird," he replied with a mischievous glint in his eye.

Trunks blushed slightly at the implication and scratched the back of his head nervously. "Oh, uh, well... We were just having a friendly conversation," he stammered, trying to hide his embarrassment.

Mobius laughed heartily. "Relax, kid. I'm just teasing," he said, patting Trunks on the shoulder. "But you know, I couldn't help but notice that Aqua from this universe seemed rather fond of you."

Trunks blinked in surprise. "Really?" he asked, feeling a mix of surprise and delight.

"Oh, absolutely," Mobius replied, nodding. "I've been keeping an eye on the situation, and it seems like there's a connection between you two."

Trunks couldn't help but smile at the thought. Aqua was a strong and kind-hearted warrior, and he had been impressed by her from the moment they met. If there was a chance that she felt the same way about him, he couldn't deny that it made him happy.

"Well, she's an amazing person," Trunks said, trying to sound casual but failing to hide his genuine admiration.

Mobius grinned knowingly. "You should tell her that," he suggested. "It's not every day you meet someone from another universe who can understand the complexities of time travel and alternate realities."

Trunks nodded, realizing that Mobius was right. Aqua had been through her own share of challenges and had shown incredible strength and resilience. She deserved to know how much he admired and respected her.

"I will," Trunks said with determination. "Once we're all back in our own timeline, I'll make sure to tell her how much I appreciate her help and how much she means to me."

Mobius gave him an approving nod. "Good. You won't regret it," he said. "Now, as much as I'd love to stay and chat, I've got a job to do. I need to make sure the timeline stays intact."

"So, what's the update?" Trunks asked, looking at his friend from the TVA.

Mobius grinned at Trunks and started relaying the current situation with Mephiles' followers.

"Well, my friend, it's been quite a ride. Thanks to my good buddy Sora, we've got Vanitas in custody. He won't be causing any more trouble for a while," he said, giving Trunks a thumbs-up.

"Infinite, well, he sort of... vanished into the abyss. Literally. He's gone, and we have no idea where he ended up. But hey, one less headache for us to deal with," Mobius continued, chuckling.

"And as for Sephiroth, Riku's sword really did a number on him. He's got a big ol' hole in him now, and I gotta say, that's gonna be a real pain for the TVA to fix," Mobius said, shaking his head.

"Successful mission, I'd say," Trunks remarked with a smirk. "Looks like we're getting the upper hand against Mephiles' gang."

Mobius chuckled. "Yeah, you could say that," he replied, a hint of amusement in his voice. "It's been a wild ride, that's for sure. But hey, it's all in a day's work for us at the TVA. Dealing with time-traveling villains is just another Tuesday."

Trunks raised an eyebrow. "Another Tuesday?" he repeated, a slight grin forming on his lips. "You guys must have some pretty eventful Tuesdays."

"Oh, you have no idea," Mobius replied with a chuckle. "Time travel tends to make things... interesting. But hey, that's why we're here - to keep the timeline in check and prevent any major disruptions."

Trunks nodded in understanding. He knew that the TVA played a crucial role in maintaining the stability of the multiverse, and he was grateful for their help in dealing with Mephiles' followers.

"That just leaves Anti-Aqua and Nebula of 2014, who are now in 2019." Mobius continued, noting that these two are the last variants that need to be stopped. "I'm sure Aqua and Nebula will stop them and warn the heroes of that time."

Trunks nodded, feeling a sense of confidence in Aqua and Nebula's abilities. "I know they'll handle it," he said, a smile playing on his lips. "They're both strong and determined. They won't let Mephiles get away with his plans."

Mobius chuckled, giving Trunks a knowing look. "And it doesn't hurt that you've got a little extra motivation to make sure everything goes smoothly," he teased.

Trunks blushed slightly but didn't deny it. "Yeah, I guess you could say that," he replied, feeling a mix of excitement and nerves at the thought of seeing Aqua again.

"Well, just remember, you've got a mission to focus on," Mobius reminded him. "Aqua and Nebula are counting on you to take down Mephiles, and the fate of the universe hangs in the balance."

"You're right," Trunks said, taking a deep breath. "I won't let them down. I'll do whatever it takes to stop Mephiles and protect the timeline."

"That's the spirit!" Mobius said, giving him a thumbs-up. "Now go get 'em, hero!"

With a determined nod, Trunks set off on his mission once again, feeling a newfound sense of purpose and resolve. He knew that the road ahead would be tough, but he was ready to face whatever challenges came his way.

As he walked through the ship's dark corridors, his mind was filled with thoughts of Aqua and the hope of seeing her again. But he also knew that he had a job to do, and he couldn't afford to let anything distract him from his mission.

With his Z Sword in hand and his allies in his heart, Trunks was ready to take on Mephiles and put an end to his evil plans. The fate of the universe was at stake, and he was determined to be the hero that the future needed.

And so, with his heart and mind focused on the task ahead, Trunks pressed on, knowing that he had the strength and support to face whatever challenges awaited him. He was ready to embrace his destiny and become the hero that the universe needed him to be.