Celestia was firing a continuous beam as was Maleficent and they seemed evenly matched.

“Soon the crystal heart will be ours, and darkness will spread across this land,” Maleficent said.

“Not if my student has anything to say about it!” Celestia said.

“Ah yes, your student, she survived my trap, I’ll be sure to turn her into a heartless first!” Maleficent laughed.

“NO!” Celestia said as she continued fighting back.

Meanwhile, Pete was hanging back and directing the heartless.

“Alright, you heartless! Give it to them good!” Pete said.

And Luna was aiding her soldiers in fighting off the Tatzlewurm heartless as they fought off the shadow heartless.

“There are too many of them! Twilight, Sora, hurry!” Luna said.

Sora rolled on the ground and jumped out of the way as a massive shadowy hoof came down on the ground and caused black crystals to erupt around it.

“DIE!” Sombra shouted, firing black crystals out of his mouth and Sora jumped back deflecting them.

“Get to cover Shining!” Twilight called and Shining knowing he won’t be much help here injured, limped away from the battle.

Meanwhile Donald used Thundaga and zapped the giant but Sombra tanked it and fired a beam at Donald knocking him away.

“Gyah!” Donald cried.

“Perish here intruder upon this world!” Sombra fired another beam at Donald but Goofy blocked it.

“Not so fast!” Goofy said as he ran forward and threw his shield at him hitting the giant in the face.

“Graaah!” Sombra stomped at Goofy but he dodged.

Meanwhile Spike was riding on Twilight’s back as she circled above him and he jumped off and struck the giant in the face.

“Will you ever cease to get in my way boy!” Sombra shouted as he swung a hoof down and tried to crush Spike but Sora ran up next to him and they both blocked the stomp.

“Thanks!” Spike said.

“No prob!” Sora said and they both shoved the hoof back and then struck it multiple times destroying the crystal limb underneath the darkness.

“Grr!” Sombra fired a beam at them and Sora grabbed Spike and flew away from the beam.

“Donald!” Sora said as he flipped to the ground and set Spike down.

“On it!” And they activated Fantasia and unleashed a flurry of fireworks that blew up on Sombra.

“AGH!” Sombra cried as he stumbled back.

“Another!” Donald shouted and they unleashed more fireworks that struck Sombra back.

“I’ll help!” Twilight fired some blasts alongside the fireworks and they pressed Sombra against the wall.

“YOU LITTLE!” Sombra fired a big beam at them but Goofy got in the way and blocked it.

“GO!” Goofy called and they unleashed final fantasia and a massive flurry of fireworks pounded on Sombra eventually busting the giant through a wall.

“NOOOOO!” Sombra yelled as he fell.

“Did we get him?” Sora asked.

Suddenly Sombra sprouted crystal wings, took back to the air, and circled around.

“Nope,” Spike said.

“Pests… so many pests!” Sombra said regenerating his arm and then firing a storm of blasts onto the area and the group had to run for it and take cover.

“AAAH!” Twilight cried when one sent her flying.

“Twilight!” Spike cried.

“You can’t win, I have the heartless on my side!” Sombra laughed before he descended onto the now roofless platform and slammed down sending rows of spikes everywhere.

“Look out!” Spike jumped out of the way of one.

“Agh!” Goofy got hit by one and was sent flying, as he landed he was injured.

“Goofy!” Donald cried and he used heal.

“Thank ya, Donald,” Goofy said as he got up.

“Hmm, Very well!” Sombra said getting an idea and he formed crystal cages and threw them at Donald and Goofy.

“Huh?!” Sora saw them fly past him and Donald and Goofy cried out in surprise as they were trapped in cages.

“Donald! Goofy!” Sora cried.

“Let’s see you make it without them!” Sombra laughed as he created a giant sphere of darkness.

“Tch! Let them go!” Sora yelled running at Sombra.

“Twilight! Come on!” Spike said as Twilight got up.

“O-ok!” Twilight said as she ran out to help.

“Take this!” Sombra fired the sphere and Sora dodged it and the sphere continued forward and Twilight grabbed Spike and rolled out of the way as it struck a wall blowing a massive hole in it.

“Hah!” Sora jumped up and used his wings to fly at Sombra and land several strikes against him.

“Spike!” Twilight threw Spike and Spike landed against Sombra’s face and he then raised the keyblade and plunged it down into Sombra’s eye.

“Tch!” Sombra roared throwing his head around as Sora continued hitting Sombra and chipping away at his armor.

“Let’s go!” Sora said as he jumped back and then jumped forward and drove his keyblade into Sombra’s chest.

Sombra growled and managed to swat Sora way and toss Spike off his head.

Both landed and simultaneously and called their keyblades back to them.

“Alright, now together,” Sora said as they ran forward.

“Stay back!” Sombra said firing beams at them but they ran around the shots and just as they closed in Sombra created a wall of crystal.

“Crap!” Spike said.

“I got this!” Twilight flew in front of them and fired a beam that blasted a hole in it.

Thanks!” Sora said as he and Spike jumped through and Sombra raised a hoof and struck at them.

“GRAAAAH!” Sombra roared.

But Sora spread his wings and flew higher, carrying Spike with him and they both dodged the hoof and came down at him with a double keyblade swing.

And shattered his chest armor, revealing Sombra himself.

“What?!” Sombra exclaimed.

“NOW!” Sora yelled to Twilight who understood what to do and she flew upwards and fired a powerful beam at Sombra and it blasted a hole through the construct and sent Sombra flying out.

He tumbled on the ground and his crystal construct crumbled, along with Goofy and Donald's prisons.

“Yeah!” Sora cheered as they landed.

Sombra got up and growled at them.

“You fools… If I cannot have the crystal heart, NOPONY WILL!” Sombra shouted and he stamped his hoof and transferred his magic through the floor and shards of black crystal broke through.

“Whoa!” Spike jumped back from one.

“Look out!” Sora struck away a falling piece of rubble.

“What’s he doing?!” Twilight asked.

“Hahahaha! I’ll bury this whole castle!” Sombra said as he jutted into the air with a massive spire of crystal.

Maleficent heard crashing noises and turned to see the castle was being struck by giant black crystals coming out of the ground.

“That fool! Is he trying to destroy the castle?! We need it!” Maleficent angrily said.

“It seems you're being pushed into a corner Maleficent,” Celestia said as she fired another blast at her and Maleficent teleported away next to Pete.

“What are we going to do Maleficent? Sombra’s not sticking to the plan now!” Pete asked.

“We search for the crystal heart, it's our only way-” Suddenly Maleficent sensed something and she turned towards the castle and narrowed her eyes.

“What is it?” Pete asked.

“We’re leaving… it seems we’ve got more company than we need,” Maleficent said.

“What?! We can’t leave! We’re-”

“Stay if you want, but I imagine the tide will turn soon,” Maleficent said opening a portal and entering.

“W-wait for me!” Pete ran in after her.

“What? Why did they leave?” Celestia asked… before she noticed something behind her and she turned.

And was attacked…

Sombra continued unleashing spires of crystal and Twilight and the others were struggling to keep their footing.

“We have to stop him before he brings the whole place down!” Sora said.

“We have to get moving then!” Spike said.

“Alright! Come on!” Sora put Spike on his back and Twilight spread her wings.

“We’ll cover you!” Donald said.

“Ok!” Twilight said and they took off as they flew through the air they saw the spires popping up around them.

“Look out!” Sora called and they dodged multiple spires and Twilight was nearly hit by one coming out of a wall she passed.

“RAAAAHH!” Sombra raised a bunch of crystals and launched them but Sora got in front of Twilight and deflected them.

“Donald!” Sora said as more spires came out to strike them and Donald used lightning from a distance and destroyed the spires.

“I gotcha!” Goofy threw his shield which ricocheted around taking out more spires and opening a path to Sombra.

“NO!” Sombra tried to raise the spire he was standing on to escape but Sora did the unexpected, he threw Spike.

“Spike!?” Twilight said.

“I got this!” Spike said as he flew at the base of the spire and he swung his weapon breaking it and it fell down.

“NOOO!” Sombra cried as he tried to react in time but Sora closed in and swung his weapon.

“Take this!” Sora said as he closed in with a powerful slash and he delivered.

“AAAGGH!” Sombra screeched as they fell onto a lower platform.

As they landed Sombra struggled to his hooves and fell down.

“It’s over Sombra,” Twilight said as Spike hopped off her back.

“No… I can’t lose, Maleficent! Send more heartless!” Sombra called out… to no answer “MALEFICENT! WHERE ARE YOU!?” Sombra demanded… no answer “Did… did she flee?!” Sombra said with a growl.

“She tends to do that,” Donald said as he and Goofy made it there with them.

“Grrrr! RAH!” Sombra growled angrily as he stood up shakily “Fine, who needs that witch, I’ll flee today and have my revenge another day,” Sombra said as he got ready to leave.

“No you don’t!” Twilight and Sora ran to stop him.

“Tch!” Sombra turned to attack and-

Something landed between them.

“What the?” Sora and Twilight paused as a figure stood there between them.

“Huh?! Who are you?” Sombra demanded.

The figure was wearing a familiar black hood which he pulled back.

“No…” Sora said, realizing who this was.

“...Hello again… Sora,” the figure revealed to be Saix said before he swung his weapon and struck Sora and Twilight, sending them both flying back to Donald and Goofy who caught them.

“Twilight!” Spike cried as she got up.

“I’m fine,” Twilight said before looking at the strange figure.

“Hmph,” Saix began walking towards them.

“Hey! I demanded who you are! Are you with that coward Malefic-” Sombra said… before Saix drew his weapon again and spun striking Sombra, slashing him across the chest.

“Huh?!” The group exclaimed.

“Ack!...Ack….gh…” Sombra croaked before he fell over and dissipated into shadow and faded away.

“Annoying,” Saix muttered.

“H-he just killed him!” Twilight said having never witnessed direct murder before that she can recall.

“Who is that?!” Spike asked.

“Saix, he’s with an evil organization known as Organization XIII,” Sora said warily.

“Another evil group?!” Spike exclaimed.

“...Enough talk,” Saix said resting his claymore on his shoulder and several nobodies appeared…

Each holding one of Twilight’s friends and Celestia.

“NO!” Twilight cried but Sora stood in front of her.

“What do you want, Saix?” Sora asked.

“The Crystal Heart, it would serve the Organization well, hand it over,” Saix said holding out his hand.

“We don’t know where it is!” Twilight said.

“Yeah it vanished,” Spike said.

“Wrong answer,” Saix said as he lowered the weapon to AJ’s throat.

“STOP STOP!” Twilight cried.

“Hand it over,” Saix said.

“We seriously don’t know! Please!” Twilight begged.

“Then he operated separately, where is he?” Saix demanded as he began to press the blade against AJ’s neck.

“I don’t know who you're talking about… I swear!” Twilight cried.

“Stop this Saix!” Sora said angrily.

“Wrong answer again, say goodbye,” Saix raised his weapon to kill AJ.

“NOOO!” The group shouted.

…

“STOP THIS!” A higher pitched voice said and Saix paused and looked.

“Huh?” The group turned and saw another hooded figure drop-down, only he was a mouse.

“Who-” Spike asked.

“The King!” Donald exclaimed.

“King Mickey!” Goofy said.

“Wish there was more time to talk fella’s but lives are on the line,” Mickey said as he walked past the group and produced the Crystal Heart.

“Good, hand it over,” Saix said.

“Don’t-” Twilight said but Saix held the blade to Pinkie’s neck this time and Twilight quieted, he held out his hand and beckoned Mickey to hand it over.

“I’m sorry everyone… I have no choice,” Mickey said as he walked over to Saix and...

Threw the Crystal Heart into the air!

“Hm?” Saix looked up briefly.

“Made ya look!” Mickey winked before he shouted “LUNA NOW!” Mickey called and Saix turned just in time to see a powerful beam heading for him and he raised his guard, blocking it but it sent him skidding back.

“Ngh!” Saix grunted and while he was sidetracked Mickey raced forward and struck down the Nobodies and gathered up everypony before leaping back to the group.

“Girls!” Twilight cried as she went to them.

Luna stopped the beam, flew forward, snatching the heart and she landed beside them.

“I am glad I made it in time, thankfully Mickey was wise enough to visit me first to discuss the plan,” Luna said before they all turned towards Saix.

“Looks like you lost your leverage,” Sora said as the group gathered.

“Hmmph… it seems I have,” Saix said with a sigh as he turned and walked towards a portal.

“Wait!” Sora shouted as he galloped towards him.

“We’ll meet again, all of you,” Saix said as he left and the portal vanished and Sora had to stop before he went over the edge.

“Argh, he got away again,” Sora said, sounding upset.

“Let us get moving, we must assess the injured, and clear out the remaining heartless” Luna said.

“Alright,” Twilight said as they trotted on inside the castle, Sora looked back before continuing with the rest of the group.

The last of the heartless was slain as Twilight, Spike, Luna, and Sora and friends appeared on the battlefield, seeing Discord with the others.

“Hmm? Ah, done in there are you?” Discord asked.

“Yes, it seems you’ve escaped the heartless’s grasp and made it back to this dimension,” Luna said.

“Where were you Discord?” Twilight asked.

“I hope you all don’t think I was simply sitting idly by while all this was going down, I was quite busy,” Discord said.

“With?” Twilight asked.

“Heartless, it seems Sombra knew of me and warned Maleficent, my home was besieged by countless heartless, I tell you it took me quite a few hours to best them all,” Discord said wiping his brow.

“Wow, that’s impressive,” Donald admitted.

“Eeyup,” Goofy agreed.

“Thankfully I was able to escape them and save the hostages, but I still have plenty of damage control to do back at home,” Discord said not looking forward to it.

“Then we’ll leave you to it, let us tend to our wounded and we’ll help out later,” Luna said.

“Not quite yet, there is still something to do,” Discord said.

“What?” Twilight asked.

Suddenly Sora’s keyblade glowed and Sora knew his cue, suddenly the crystal heart in Mickey’s hand glowed as well.

Sora went on to use his keyblade to lock the world key.

When the light cleared everypony was confused save for Luna and Discord.

“What was that?” Twilight asked.

“Just finishing our business here, now that the heartless have been driven away we need to take our leave,” Sora said.

“Now?” Twilight asked.

“Yeah, there are other worlds to save too, but we’ll come back and visit,” Goofy said.

“Yeah!” Donald said.

“Pinkie promise?” Twilight said with a sad smile that her new friends were leaving so soon.

“What?” Sora asked.

“It's a promise you don’t break, it goes like this,” Twilight said showing them.

They all laughed at the cupcake bit and they did the motions as well.

“We promise,” Sora said.

“Before we go there’s one more thing to take care of,” Mickey said, turning to Spike.

“What?” Spike asked.

“I haven't witnessed a keyblade wielder being chosen here since Starswirl, when we meet again, let’s do some training, help you get used to that keyblade,” Mickey said.

“I’d love that,” Spike said with a smile.

“Alrighty then, we should help you get back to your gummi ship,” Mickey said to Sora and the others.

“Alright, see ya later!” Sora waved to the other ponies.

“See you!” Twilight said, waving back at them as they trotted back to the train.

As they vanished into the distance, Twilight turned to the others.

“Alright, let’s get everypony together and get them inside, we have a lot of injured,” Twilight said, looking around at the guards who were weary from fighting the Tatzelwurm heartless.

“Ok!” The others said as they went to work.

Three weeks later

Spike was training in an open room in his room and he found the keyblade was like an extension of himself, he set up some dummies and attacked them to sharpen his skill.

As Spike trained he heard some steps behind him and turned to see Twilight approaching.

“Hey, Spike! How is the training?” Twilight asked.

“Going great!” Spike panted.

“Well, you have a visitor, I’ll leave you two alone,” Twilight said with a smile as she left.

“A visitor?” Spike asked before seeing a familiar mouse enter the room.

“Heya there,” Mickey said with a smile.

“King Mickey?” Spike said in surprise.

“I said I’d be back, didn’t I? And I also said I’d aid your training, well, let’s get training,” Mickey said summoning his keyblade.

“...Ok!” Spike said with a smile, as he got ready to spar with Mickey.

Twilight walked into the open and saw her friends waiting for her outside.

“I’m glad everypony recovered well,” Twilight said.

“Can’t keep us down,” Rainbow said as they walked away with her.

“Alright girls, while Spike is training, let’s go, we have some old friends to meet,” Twilight said with a smile as they walked off towards Sugarcube Corner.

Where the Gummi Ship was parked.

And they knew, more adventures were on the horizon.

FIN

Author's Note

Suddenly Sora’s keyblade glowed and Sora knew his cue, suddenly the crystal heart in Mickey’s hand glowed as well.

Sora went on to use his keyblade to lock the world key.

When the light cleared everypony was confused save for Luna and Discord.

This is about this just in case your confused. https://youtu.be/2oVBuxyrues

Annnd done! Whew, this was a tough chapter, but I hope you all enjoyed it.

I bet that visit from Organization XIII was surprising, wasn't it? Let me know how I did in the comments.

Thank you all for the views on my first KH story, and don't miss out on your chance to cast your vote on my next story, which is located in my blogs. [votes end soon]

Hope you enjoyed this custom level of KH in Equestria, see you next time.