A saiyan in Equestria?

Ato, the saiyan is no longer the same person he was before he landed on Equestria. Before he was a young man fixated on murder, now he has grown into someone who genuinely cares about his friends. Now everything he has learned will be put to the ultimate test, his strength, his smarts, and his loyalty to his friends.

"Ato, Ato wake up." said a voice

Ato had just been sleeping peacefully until he had been woken up by Celestia, well Celestia's thoughts.

"Who's talking to me?" Ato said half-awake

"It's me Celestia, Ato something terrible is going to happen tomorrow."

"Oh right, I forgot about that psychic-link thing. What's up?" said Ato

"There's something you should know about my past, I have a sister named Luna, and she's being possesed by a being named Nightmare moon. She's practically invincible, her one weakness is the elements of harmony, and even then, she's only slightly weakened. She also plans to raise an army of Dark Elves. Now let me ask you this: are you up to the task?" asked Celestia

"Yes, ma'am." he responded

"But you must make sure that NOBODY knows about this besides the royal guard, I don't want the citizens panicking."  said Celestia

"What's going to keep them from panicking tomorrow?" asked Ato

"I've sent out invitations to everyone in Equestria for a party at Castle Canterlot, from there, it's up to you, and the rest of the royal guard." said Celestia

"Alright, I understand ma'am." said Ato

The thought of an entire army storming the town made Ato shudder. Him combined with the Equestrian forces, was still at least seven of them vs thousands of them, and then there was Nightmare moon, a supposedly invincible foe. The only thing he could think about right now was training.

He did laps around Ponyville, lifted up entire trees, and he didn't stop until his body could do no more.

When Rainbow Dash saw him he looked a little stressed,

"Hey Ato, why so serious?" she asked

"Well, there's something important I have to tell you."

Ato then explained everything about what was going to happen tomorrow.

"Oh my gosh, there's gonna be like HUNDREDS of those guys, and that's not even talking about NIghtmare Moon!" said Dash

"I know, but just stay in the castle, I don't want you to get hurt." said Ato

"Nope, no quitting now, you gotta let me help you now!" said Dash

"But-"he began

"Nope, no buts here, I'm helping you whether you want it or not!" said Dash

".... Thanks Dash." he said reluctantly

"But if I die.." said Ato

"Don't say that! Of course you're gonna make it! Right?" said Dash worriedly

Ato gave a thumbs up and a genuine smile as a response.

For the rest of the day, Ato began to train with Dash as his coach giving pep talk every now and then.

Finally at 9:00 PM they decided that was enough for the day, and that they were prepared for tomorrow.

Ato began to reflect on what he had done that day, now he had put his best friend's life on the line, he could never forgive himself if she got hurt. "What am I going to do?" The question ringed in his head until he finally fell asleep.