-Equestria, the Old Castle-
"Halt!" called out a voice behind Goku Black and the group of ponies. The false saiyan turned around and witnessed another pony standing in front of him. Said pony raised a protective barrier around herself and the unconscious pony, which managed to endure his ki blast.
"Who are you?" inquired Goku Black. He began inspecting the pony before him. He noticed that the pony happens to be as tall as the one he has faced a couple of minutes ago. He also noticed how different the new pony is compared to the one who assume he was a human.
The mare in front of him had snowy white coat with a slightly pink tinge, a shining tail and mane that consists of violet, azure, green and cyan colours, wings, violet eyes, a long, straight, spiraling white horn, a gold crown and necklace, with both having a violet gem encrusted in to them.
"Princess Celestia…" gasped Twilight Sparkle. She then lightly bowed her head in respect, with her friends following suit. A while light began consuming the comatose pony, slowly dissipating as the time went by. After a few moments, the pony completely disappeared.
'Twilight Sparkle and your new friends, I need you to listen very carefully. Go back to the library and find a reformation spell. Don't worry about me, I will hold him off.' Said Princess Celestia telepathically, which was heard by the mane 6. The ponies raised their heads and gave Princess Celestia a bewildered look.
'Don't worry about my sister. I've teleported her to my castle… What are you six waiting for? This is a being we can't beat by using raw force, even in his current state!' stated Princess Celestia. The mane 6, whilst wearing a surprised expression on their faces, nodded and began running towards the library.
"Where do you think you're going?" inquired Goku Black of the mane 6, speeding towards them with the intent of finishing them off. Princess Celestia witnessed Goku Black flying towards her ponies and took action immediately. Her horn began glowing, which made Goku Black slow down, and eventually, freeze in mid air.
"You think that you can just come here, threaten and attempt to kill my ponies, my sister and all of the inhabitants of this planet? Not while I'm around!" exclaimed Princess Celestia. Her horn began glowing again, this time, making Goku Black slam in to the stone floor with a lot of force.
Goku Black tried to move his limbs and whole body, but had a lot of difficulty doing so. He put two of his fingers on his forehead, and began charging ki blasts, that he will shoot from his eyes. The false saiyan used instant transmission, and appeared behind Celestia.
He shot the ki blasts from his eyes, only for them to be countered by a barrier that Celestia put up behind her. Princess Celestia responded by kicking Goku Black in the chest with her back hooves, sending him back from the force of the kick. He broke through one of the castle's walls and crashed in to a tree.
After knocking down the tree upon impact, Goku Black shakily got up and coughed up some more blood. He looked at the now approaching Princess Celestia. He flew towards Princess Celestia and aimed a punch at her muzzle. She dodged it and launched a magic beam from her horn at Goku Black.
The false saiyan slapped it away and countered with a powerful kick. The kick connected with the mare's back and sent her flying in to the air. She caught herself, and immobilized Goku Black yet again. She threw him in to the ground ,this time with more force and began charging up a powerful magic beam…
-Equestria, the mane 6-
The ponies ran and flew through the Everfree Forest back to Ponyville as fast as they could, passing through the bridge and the river (with the help of the sea serpent yet again). After a few minutes of rushing for the library, they finally made it there.
Twilight opened the door and rain in to the library. Her horn began glowing, making some of the books get enveloped in a purple aura. She then began bringing them closer to her face and looking through the pages, searching for the required spell.
'Where is it… Where is it?' thought Twilight Sparkle, having very little luck in finding the reformation spell. She puts the book that she had back in it's place and went for the next one, then the next one… then the next one…
Seeing Twilight struggle with finding the spell, the other ponies began searching for it too. Pinkie Pie looked around and smiled. She then walked up to a bookcase, took out one book, opened it and brought it to Twilight.
"Found it!" exclaimed Pinkie Pie, showing Twilight Sparkle the book. She then went wide eyed, surprised that Pinkie Pie found the spell so quickly. She read the information on how to perform it and smiled.
"Alright girls, let's go back. We have a baddie to reform!" said Twilight Sparkle cheerfully, whilst walking out of the library. The other mares followed her out of the library, beginning to run and fly through the Everfree forest once again…
-Equestria, the Old Castle-
Princess Celestia unleashed the beam that she has been charging up. The false saiyan raised his head and saw the upcoming attack. He then tried to bring up his fingers to use instant transmission, but to no avail…
'I haven't used this technique in a while… Here goes nothing' thought Goku Black. He concentrated really hard and managed to use instantaneous movement, thus evading the attack. The attack connected with the place where Goku Black used to reside, creating an explosion afterwards.
'That should have dealt some damage…' thought Princess Celestia, examining the explosion. She then heard laughing behind her, and saw the false saiyan, hovering without difficulty and unaffected by the magic beam.
"Not too bad, creature. But I refuse to get killed by mortals." Said Goku Black, staring in to Celestia's eyes. The mare stared back in to his eyes, frowning.
"Why do you hate mortals this much? What have they done to you?!" said Princess Celestia, demanding an answer, to which Goku Black just smiled.
"You see, mortal, I want to cleanse each and every planet of your kind, due to them destroying the planet's beauty. Take humans, for example. As long as they exist, or any race that's similar to them for that matter, there will be no peace in the universe" calmly explained Goku Black.
"There exist races that are peaceful and don't destroy the planet's beauty! The population of this planet is relatively peaceful. Sure, some ponies can be jerks, but it's not worth destroying a whole race over that!" shouted Celestia.
"I wish I could believe that, but alas, I can't." said Goku Black. He absolutely disappears from Celestia's point of view, surprising the princess.
He appeared in front of her and threw a punch aimed at her muzzle. This time, it connected and sent Celestia back. The false saiyan didn't stop there. He followed up his successful punch with a barrage of attacks.
The princess is barely managing to dodge the punches and kicks that Goku Black is throwing at her. Some managed to hit her, damaging the mare greatly. She then saw an opening,
Her horn began glowing, sending a lightning bolt at the false saiyan afterwards. It connected, dazing Goku Black momentarily. Her horn began glowing yet again, but this time with a more vicious, crimson red aura.
She threw one of her hooves at Goku Black, with the hit connecting and forcing the false saiyan to stumble backwards in mid air. While he was distracted, she turned around and kicked Goku Black with her back hooves yet again, connecting with his face this time around.
This sent Goku Black flying towards the ground. He crashed in to the hard soil with his back, creating a pretty huge crater afterwards. He began getting up, but found the task at hand more difficult to complete than last time…
"Princess Celestia!" shouted Twilight Sparkle, seeing her teacher in the air. The princess had a few bruises and cuts, but otherwise was relatively unharmed. She turned around and saw her student with her friends.
"Get ready to use it!" shouted Princess Celestia. Twilight's horn began glowing, showing that she has begun doing so. Goku Black dashed out of the crater and flew towards Princess Celestia with an extended arm, pointing the ki blade at her.
The false saiyan managed to stab the princess, but didn't hit any vital organs in the process. Princess Celestia shouted from the pain that she is now experiencing.
"You dropped your guard." Said Goku Black. He then threw a kick at her, but stopped. The Princess immobilized him again, sending his body towards the ground near the mane 6 afterwards.
After which he landed on his chest, with the princess following suit, bringing down her front hooves on his back. Some more blood escaped the false saiyan's mouth, impairing his vision further.
"Twilight, now's the time!" said Princess Celestia, grunting. Twilight nodded, with her horn starting to glow even stronger. Goku Black's body got enveloped in a light green aura, confusing the saiyan at first. He then began attempting to thrash wildly, feeling his mind getting attacked.
"Let… Go of me!" demanded Goku Black, attempting to move his body, but having no success. He tried using instantaneous movement, but wasn't successful, due to him being weaker and having a lack of concentration.
He looked at Twilight Sparkle and saw her casting the spell. He began charging up a ki blast to shoot from his eyes yet again. Princess Celestia noticed this and put a hoof on his head, forcing him to stop charging the ki blast.
"Done." Said Twilight Sparkle. The pain that Goku Black was experiencing slowly began to fade away. He also felt Celestia's magic on him getting weaker, most likely due to the wound that he has managed to inflict on her.
He elbowed Celestia in the stomach, which broke her concentration. He then quickly got up whilst gritting his teeth and began assaulting Celestia yet again.
Rainbow Dash flew up in to the air a bit, lunging towards Goku Black afterwards. She punched Goku Black's back, making him loose his footing. He missed a few attacks that he threw at Celestia and began focusing on Rainbow Dash.
Before he could turn around to face her, she kicked him in the head with one of her back hooves, making the false saiyan fall on his back yet again. He began getting up, but fell on one knee afterwards.
He began panting heavily, his vision turning even blurrier and darker. He looked at the mane 6 and the princess. Scowling, he used his last reserves to attempt to get up on both feet, but to no avail.
'I've exhausted this body too much… I've… Lost…' Thought Goku Black, whilst slowly losing consciousness.
'What is this new feeling… Is it… Guilt? What have the ponies done to me?!' questioned Goku Black.
"Damn you… mortals…" said Goku Black, before closing his eyes and falling to the ground, unconscious. Princess Celestia saw this, and sighed.
"Good job everypony. We beat him…" Said Princess Celestia, walking towards the mane 6. Twilight ran up to her teacher and began nuzzling against her, careful not to touch her stab wound.
"Princess, are you going to be alright?" asked Twilight Sparkle, examining the wound that Goku Black managed to inflict, to which the princess nodded.
"What do we do with him?" asked Rarity, pointing at the unconscious saiyan. The ponies (minus Twilight Sparkle and Celestia) put their hooves to their chins and began deciding, what to do with Goku Black.
"How about we banish him to the moon?" suggested Rainbow Dash. Rarity and Applejack agreed, albeit hesitantly, with the Pegasus, whilst Fluttershy, Celestia, Twilight and Pinkie Pie objected.
"I uhm… S-say we spare him… I think h-he's just misunderstood and someone or something did something bad to him. A-also, Twi did cast a reformation spell on him" said Fluttershy, getting a weird look from Rainbow Dash.
"Fluttershy, even with the reformation spell he attacked and tried to kill Celestia!" said Rainbow Dash.
"The reformation spell's effects take some time, Rainbow Dash. They're not istant…" explained Twilight Sparkle.
"Alright, it's settled. Girls, take him to the hospital. I need to be back at the castle to raise the sun." said Celestia. She then got enveloped in a white light and teleported to her castle…