[I do not and never will own Big Hero 6, but I do own my OCs.]

Chapter 25: Final Battle

Big Hero 6, and Callaghan arrived in an area behind Langstrom Krei's manor. They saw a big hangar, a cover over something in the yard, and no sign of Langstrom Krei.

"OK, Langstrom Krei." Hiro called. "Show yourself."

"Delighted to." Langstrom's voice said. Langstrom Krei rose up from a elevator in the floor in the area behind his mansion.

However, instead of his business suit, he was wearing black male-style underclothing, and had a chestplate and shoulder armour that looked like Wasabi's, and had a helmet that looked like Hiro's, and he had steel fists and rocket thrusters, like Baymax, except it was in the same colours of Baymax's first armour. And the Nightmare Crown was perched on top of the helmet.

The team gasped. "How did you get all that armour?" Hiro asked.

"Isn't it obvious?" Langstrom said, "Callaghan copied your suit data." Hiro gasped and looked at Callaghan. "He made me to!" Callaghan said innocently.

"And I copied all the weapons of your friends and robot's armour too." Langstrom Krei said, as He produced plasma blades, wheel discs, 2 chemical bomb lobbers from his shoulders, a flamethrower from his chest plate, and his rocket fists.

"Wow." Fred said. "My compliments to your designs."

"Well, I don't want to blow my own trumpet, but yes, I know." Langstrom said.

Callaghan glared coldly at Langstrom Krei. "Langstrom Krei, Enough is enough." he said. "Hand that crown over, now."

"Why on earth would I do that?" Langstrom said. "Besides, I figured it'd be much more fun to use it to destroy you; being the pathetic traitor you are, Robert Callaghan."

Callaghan glared coldly at Langstrom Krei.

"Is this what your brother would have wanted?" Hiro said to him.

Langstrom grinned evilly. "Well, Hiro Hamada, why don't you ask him yourself!" He pulled back a cloth covering two covered cages, and the team, and Callaghan gasped when they saw the people in the cages; Alistair Krei, and Robert's daughter, Abigail, both tied up in the cages with their mouths duct-taped shut. The team were shocked, knowing Langstrom would go this far to get what he wanted.

"Krei!" The team shouted. "Abby!" Callaghan said in shock. Alistair Krei and Abigail saw them and muffled through the tape.

"How dare you threaten the life of your brother and my daughter!" Callaghan shouted. "Why didn't you come after your brother yourself?"

"You would never understand, Calla-loser!" Langstrom shouted. "I wanted to destroy my brother! If he hadn't denied me the one chance I had to use the Nightmare Crown for what I really wanted, I'd have taken over the world!"

Alistair Krei glared at his brother through his cage.

"No one would ever use such old or powerful technology to do such a dangerous thing!" Hiro shouted. "Not even Mom, Dad, Tadashi, Or Professor Granville!"

"Those people are nothing but pathetic fools!" Langstrom said in annoyance. "But you, Hiro Hamada, are not like them." He grinned evilly. "When my feeble brother saw your microbots at the showcase, he knew he had some powerful technology when he saw it. Especially since your brother Tadashi taught you well, and that you now carry on his legacy, as that weaking Granville stated you were to do. And now, I propose…" he paused impressively. "…an offer for you."

"Well, If that's what he wants." Fred said. "Hold on." Hiro said to Langstrom Krei. "What do ya want, anyway?"

"It is simple, Hamada." Langstorm said. "Give me all the technology your brother made at the San Fransokyo Institute of Technology, and I will spare the lives of my feeble brother and your ex-professor's daughter."

Hiro stared. He was sure that there was a catch in this somewhere, but he wasn't sure where. "And the lives of everyone else in the city?" he asked.

Langstrom grinned. "Of course. And I will even adopt you, as my own personal son." He grinned. "You could have a proper father again, Hiro. It'd be perfect! You'd learn a lot more about technology, much more than that loser Granville."

Hiro stared at the villainous Langstrom Krei. he was hesitant. Would Langstrom keep his word? "I… I… I'm not sure…"

Langstrom sighed. "Well, then, if you want Robert's daughter and my goody-two-shoes brother safe, you'd better also give your robot to me. Do that, and I will release them. Refuse, and I will destroy them."

The team's eyes widened. Hiro sighed. "Hiro?" GoGo said, nervously. "You don't have to do this." "I don't have a choice, GoGo. We have to do this." He said, turning to Baymax. "I will pass my ownership of you to Langstrom Krei."

Baymax just stared. "I do not think that this is a good idea, Hiro."

Hiro became serious. "Baymax, you once sacrificed yourself for me and Abigail. Now you have to sacrifice yourself again; this time for all of San Fransokyo."

Baymax stared. "Hiro, is doing this what Tadashi would have wanted?

Hiro glanced at his friends, then Langstrom, then Callaghan. Somehow or other, he could feel a nagging sensation in his mind, saying that he was making a big mistake. Hiro knew now what he had to do. He looked at Langstrom Krei.

"If I let you use Tadashi's technology for your own personal needs, no one will be safe. Not your brother, Abigail, Aunt Cass, Professor Granville, or anyone. Or my friends." he said firmly. "We're not going anywhere until that crown is destroyed.

Langstrom snarled. "You shoulda taken my offer, Hamada, and Now, I will DESTROY YOU!"

So saying, he fired his rocket fists at the team. they darted away.

Wasabi leapt up to Langstrom, wielding his plasma blades, but Langstrom countered all the moves Wasabi made.

GoGo threw her wheel disk at him, only for him to counter it with his wheel disk. Honey fired chemical capsules at Langstrom but he deflected them, but Langstrom defelcted all of them off his armor.

"Was that your best shot?" he said to her. "Now let me show you mine." He fired some of his chemical capsules. Unlike Honey's, they were more darker green and brown and black, and they had more deadlier effects; the green one made acid that melted a hole in the floor, and the black one made a puddle of oil. The Brown one exploded in a thick stinky gas cloud, that made Wasabi cough and splutter, and his eyes watered. "The horror..." he gasped.

Fred stepped up, and breathed his fire on Langstrom. But Langstrom just grinned. "Flamebreath? Please. I have something better." He used the flame thrower on his chestplate, which frightened Fred. "Holy cow!" he exclaimed. "Langstrom's using our powers against us!"

That was a worthy distraction enough for Langstrom. He punched Fred, sending him flying, Thankfully, Baymax caught him. "Falling from heights results in near-fatal injury." he said.

Hiro saw what Langstrom Krei had done, and he wasn't happy. "Hey!" he shouted. "No one does that to my friends!" He sprinted up to Langstrom Krei, but as he jumped to him, Langstrom quickly darted outta the way. "Your efforts are futile, Hamada."

"I'm not gonna give up." Hiro said firmly. "Tadashi would never do that!"

"I bet he would never do THIS!" Langstrom said angrily, and he fired a laser from the crown, which almost hit Hiro.

Hiro and his friends, and Callaghan quickly retreated into the hangar in the yard, and sealed themselves in.

Callaghan used his microbots to barricade the door. "They won't hold the door forever, you know, Hiro." he said. "We need a plan to take out Langstrom!"

"It''s no good, Hiro!" Wasabi said. "Langstrom is too powerful!"

"Yeah!" Fred stated. "Langstrom's using our suit weapons against us!"

"No thanks to Callaghan allowing him to copy our suit data!" GoGo snapped. "Hey!" Callaghan snapped. "On good terms, Langstrom made me do it!"

"I know why Langstrom made you do it, Callaghan." Hiro said. "He wanted to use the crown for what he really wanted - to take over San Fransokyo."

"This is worse than when we had to face Callaghan when he was evil!" Fred said in panic.

It was then Hiro thought back to when they first defeated Callaghan. The words echoed in his mind.

'Listen up! Use those big brains of yours to think your way around the problem! Look for a new angle!'

"That's it!" he said. "What's it?" Wasabi asked. "We need to do the same thing we did when we beat Callaghan: look for a new angle!" Hiro said. "Are you sure this will work?" Honey asked. "Sure." Hiro said. "It worked before, and it can work again." "It's worth a try." GoGo said.

"Well, I think we'd better try on the run, guys!" Wasabi said. "LOOK!"

Langstrom cut through Callaghan's barricade and the door.

"Oh no you don't!" Callaghan growled, grabbing Langstrom with the microbots. the team escaped, followed by Callaghan. Langstrom broke free from the microbots, and started flying toward the team.

Without a second thought, GoGo sped away from Langstrom Krei, and led him around the yard.

She whizzed round in circles, and Langstrom got so confused, he dizzily fired his wheel disks at her, but, using her Gyro Jackhammer move, she countered them, and the discs flew to him, and one scratched his armour.

"How dare you!" Langstrom yelled. "That armour was expensive!" But the other wheel disk, whizzed toward him, and cut off one of his chemical ball lobbers. it fell off with a crash.

"No great loss." Langstrom snarled. "I've still got another..." He aimed toward Wasabi, and threw the wheel discs at him, at lightning speed. Wasabi, in fright, waved his plasma blades around, and the minute the disks hit them, they became nothing more but metal shreds!

"You idiot!" Langstrom growled. "Time I broke your blades!" He extended his plasma blades, and started running toward Wasabi.

But at that moment, Wasabi quickly bent down, pretending there was a chemical spill near his feet, and Langstrom quickly tripped over him, but recovered with his rocket thrusters.

"Honey, heads up!" Wasabi called. "On it!" Honey Lemon called. She threw chemballs up into the air, and they splatted on Langstrom Krei, most of them landing on his plasma blades, gumming them up. He saw her, and quickly charged towards her, powered by his thrusters, gummy plasma blades outstretched.

However, at the last moment, Honey darted away, and Langstrom collided with the wall of the hangar, and got his blades stuck in it. He pulled as hard as he could, and eventually, pulled himself free, breaking his plasma blades power source in the process.

"Grrr!" Langstrom growled. "It matters not! I'll still beat you, Big Hero 6!"

Fred super jumped up to Langstrom, and grabbed his chestplate with his tail. with one quick tug, he ripped it off, and used it to heat up the other chemical bomb lobber, causing it to explode in a awfully sticky brown slime. Fred then melted the chestplate, and soon it was nothing more than a puddle of molten grey metal.

Langstrom Krei was getting desperate. he fired his rocket fists, but at that moment, Baymax blocked them, and then grabbed their power circuit boards, destroying them. the rocket fists fell to the ground with a crash.

"You go no more weapons now, Langstrom." Hiro said. "Why not just give up and surrender now?"

"No chance!" Langstrom snapped. "You and your friends may have destroyed my weapons, but it matters not! I don't need weapons to beat you!"

"What's that supposed to mean?" Wasabi asked. "I've saved my strongest weapon for last - The Crown of Nightmares!"

Using the Crown of Nightmares, he fired lasers and fireballs at the team!

"Langstrom Krei, stop!" Robert said. "You don't know what you're messing with! Hiro's parents wanted that crown destroyed for a reason!"

"Why do I care about the crown's destruction?" Langstrom yelled. "You were against me, and you turned against Hiro when you killed his brother, and now you're still against me?"

"Langstrom," Callaghan sighed. "I never intended any of this to happen, I just wanted the crown destroyed. Your device turned my college buddy into a yeti, and you planned to destroy San Fransokyo with the Nightmare Crown. I knew it was too dangerous from the start."

"But," he added sternly, "when you targeted me after I was arrested, you turned me into your puppet, and you ended up blowing your own cover! No one, not even Tadashi, OR his parents, or Hiro, Or Professor Granville, or your baby brother, would ever do ANYTHING that stupid!"

"You are as weak as you were when you were arrested for the destruction of Krei Tech!" Langstrom shouted. "You were such a fool, you failed to realize that I was the one who sabotaged my brothers pathetic wormhole device; the same one that you thought had killed your daughter!"

Everyone gasped. Krei and Abigail's eyes widened. It hit Callaghan like a freight train. "You… you… sabotaged Krei's portal!?" Reality had struck him - his daughter getting lost in the portal incident had been an accident all along. He felt so shocked, he lowered his guard down.

"Now," Langstrom Krei growled, "it's time for you to pay the fiddler! Or, should I say… traitor!"

On that, he zapped a laser beam, Callaghan darted away, but the beam hit his arm, and he fell down to the floor, clutching his arm in pain. His eyes were stinging with tears, and his arm burned painfully, as if it was scalded with hot water.

"Hey!" Hiro shouted. "You Leave Callaghan alone, you… you… big bully!"

"You stay out of this!" Langstrom shouted, and he fired a laser from the crown, which almost hit Hiro.

Langstrom glared hard at Robert. "Your choice, Robert." he said. "You can go either to Langstrom Industries, or to the grave, alongside your best student, Tadashi!" He then turned to Hiro. "If my pathetic ex-girlfriend Cassie raised you well once, I can raise you just as well, or even better!" He then turned his attention back to Robert. "Now join me!"

"Never!" Callaghan roared. "I would rather die than join a corrupted person like you! Go ahead and destroy me, Langstrom; I don't care what you do to me, as long as you do it!"

"Fine!" Langstrom snapped. He started to prepare a huge fireball from the Nightmare Crown; as powerful as the fire that took Tadashi.

Langstrom stared down at his ex-friend disdainfully, as the fireball above his head grew. "You could've had everything you wanted, Robert: A new job, redemption, my baby brother destroyed, and the chance to see your pathetic daughter again! It could have happened! But you just had the nerve to disobey me! And now, you're gonna pay the price: by facing the same flames that took Tadashi! Everyone in the city will soon be mourning for your REAL death!" The fireball was now as big as Baymax. "Farewell, Robert Callaghan… for the LAST time!" he roared. By now, the fireball was about the size of the portal, the one Callaghan once used to try to destroy Langstrom's baby brother with.

"Professor Callaghan! Run! Save yourself!" Hiro shouted.

Robert stared at Hiro, clutching his hurting arm. "I'm so sorry, Hiro," he said. "I should never have dragged you into this. Forgive me."

"You can't do this!" Hiro yelled. "I can't let you die like this, not when I just forgave you!"

"It's the only way I can save you, Hiro." Robert said. "No." said Hiro quickly, coming up to his former idol's side. "If you go, I'm going with you."

Robert stared. "Are you sure about this?" he said. "It's what Tadashi would have done." Hiro said to him.

Langstrom had now charged the fireball to maximum power. Hiro & Robert both shut their eyes, waiting for the pain of death. Thoughts of the final farewells began to race through Hiro's head, hoping it would reach him by his funeral.

Langstrom was about to fire the fireball, when suddenly…

A chemball flew into his face, them more and more and more. Honey was firing chemballs outta her purse like there was no tomorrow.

Baymax ran over to Hiro and Callaghan. He looked at Callaghan's arm. "On a scale of 1 to 10, how would you rate your pain?" He felt the injury, and at once, Callaghan felt his arm stop hurting.

The team surrounded Langstrom Krei. Lnagstrom Krei rocketed up, trying to escape, but suddenly, Callaghan grabbed him by the waist with some microbots. He used the microbots to hoist himself up to Langstrom's level, and go up as close as he could to the captured Langstrom.

There was a long pause. Everyone stared at Callaghan & Langstrom; Hiro, Baymax, his friends, even Alistair Krei and Abigail from their cages.

Robert stared at the crown on Langstrom's head. "I'll take that." He said, snatching the crown off Langstrom's head, and turning away.

"NO! What the heck are you doing?!" Langstrom screamed at Robert.

Big Hero 6 looked up at Callaghan holding the crown. For a moment, he actually considered putting it on, but then grinned.

Robert had his back turned to the captured Langstrom. "What I should have done 11 years, 5 months, 4 days, five minutes and 27 and a half seconds ago." He said. He winked at the team. "Hiro, guys, This thing's history." With that, he snapped the crown in half, making it lose it's power. Hiro caught the crystal that fell out of it.

"NOOOOOOOOO!" Langstrom yelled as Callaghan headed down to the team, who now surrounded the microbots that held Alistair Krei's brother.

"Idiots! You're all idiots!" Langstrom roared angrily at the team as he was lowered down by Callaghan. "I loathe your family name, Robert Callaghan, and I loathe your family name too, Hiro Hamada! And now I also loathe all your friends' family names too! People like you will one day be destroyed! You'll soon be ruined, forgotten, spending eternity rotting in a graveyard!"

The team stared crossly at Langstrom Krei.

"Is that so?" asked Hiro, smirking. "Well, Langstrom Krei, I think it's time you learnt the true meaning of 'defeat'." He turned to his healthcare companion. "Baymax?"

Baymax stepped up. "My programming prevents me from injuring people," he said, "but in this case, I shall make an exception." With that, he punched Langstrom in the face, sending him flying. He landed on the ground with a thump.

Wasabi managed to carefully cut through Alistair Krei's cage. Hiro stepped up and helped him out, untied him, ripped the tape off his mouth, and then he went up to where his big brother was.

Alistair stared down at his older brother. "Oh, Langstrom," he said sadly. "I never wanted this to happen." Callaghan went up to him, feeling quite remorseful, almost as remorseful as he was when he was arrested. He was quite surprised.

"Alistair," Robert said sadly, "I just cannot express how sorry I am." He chuckled mirthlessly. "I just literally don't know where to start." He paused. "I guess I should start with trying to destroy you. I should never have blamed you just because I thought you were the cause for losing my daughter. I greatly regret what I did to you. I was wrong, and I'm really sorry for blaming and trying to destroy you. I know you'll hate me for this, but I just wanna start anew for what I did."

Alistair Krei smiled. "I know you do. We'll discuss after we've dealt with the crown, and we make sure that this horrible chapter in the history of San Fransokyo is over."

"I think it already is." Callaghan said, holding the 2 halves of the Nightmare Crown. Alistair Krei smiled.

By that time, Wasabi & Honey managed to rescue Abigail, and helped her out, and got the tape off her mouth. She saw her dad, and he stared at her. His heart was pounding like a drum.

"Dad?" Abigail said, nervously. "Abigail?" Robert stared at his daughter and hugged her. "Oh Abigail." He sniffed. "I missed you so much. And I bet you missed me too."

"Yes, yes I did." Abigail said.

Robert smiled through his tears. "We have a lot to talk about."

Krei sighed, then he stared in disgust at his brother. He then dialled the police immediately.

Almost a few minutes later, the cops showed up. The minute they saw Callaghan, they started toward him. Callaghan raised his hand to them. "Officers, I am no longer the villain I once was." Callaghan said. "Hiro Hamada has changed me, and now, I have changed my ways for the better. Spare my life, and let me prove to all of the city that I am no longer a criminal.

The cops huddled and discussed something between them, then turned back.

"Professor Callaghan, you have proven yourself a criminal in the past, but however, you have proven that nothing is impossible when you change for everyone's good." With that, the cops considered something. They grinned.

"Professor Callaghan, Come to the court first thing tomorrow morning, and we shall discuss how we shall grant your request." Callaghan nodded in acceptance. The cops turned away, but Callaghan stopped them. "Wait." He said.

The cops turned. "Yes?" they asked.

"The real criminal you need to arrest is right here." Robert said as he pushed a dirty and beat-looking Langstrom Krei towards them. "Here he is."

"Thanks." The front guard said. "We'll take it from here." The cops handcuffed Langstrom, and shoved him into a patrol car.

"And you'll have to take this as well." Hiro said, handing them the remains of the Nightmare Crown. "I think it'd be best if you disposed of it." He handed them the crystal as well. "You'd better put this crystal somewhere safe, and we've got another one back at Fred's manor. We'll hand it over to you if you stop by."

The cops agreed to this.

Alistair glared at his brother. "Well, brother, I think you learnt a valuable lesson - confessing to crime doesn't pay."

The patrol car drove away, with Langstrom glaring at the team as it left.

Robert stared at his daughter and hugged her. "Big Hero 6," Callaghan said, "I can never thank you enough for saving me and my daughter. I missed her so much!"

"It's okay, Dad. We can finally be together now." Abigail said.

"I am so happy to see them reunited." GoGo said, as tears welled up in her eyes.

Hiro looked at her. "GoGo, are you-"

"No." GoGo snapped, cutting him off. "I… just have something in my eye."

Unbeknownst to them, a stranger was watching from a nearby rooftop. To a certain comic book fan, he was awfully familiar – apart from the suit he was wearing.

"Good job… my son." The stranger said.

AUTHOR'S NOTE:

Do you know who that stranger was?

I certainly do.

ANYWAY, So sorry for holding this back, I had lots to do. but I guess it was worth the wait, wasn't it?

Stay tuned for the epilogue, coming soon! Hopefully!

READ & REVIEW!