He sleeps. A lot

Okay, guys, here's the plot

Fanfic by Milkyr (thanks @peachyfnaf for editing <3)

Art by CreesA

Reunion

“Eclipse… Promise me one thing before I turn off and you're loaded into your own body..."

"Yes, of course! Anything for you, Sunny."

"No matter what happens… Don't lose yourself."

Gray fingers touched golden ones, and Eclipse looked at Sun. At his beaming smile and pale blue eyes filled with care and slight excitement.

"Whatever that means, I promise."

This was the last time Eclipse saw his Sun happy and alive.

***

Emerging from his own memories, Solar raised his head from the table. He fell asleep on the blueprints again. Grumbling softly to himself, the inventor got to his feet and stretched, hearing his iron joints creak. The animatronic soundlessly walked in soft slippers to the laboratories exit door. Focusing his hearing module on the space beyond the door, Solar listened to the sound of… nothing.

It was pretty quiet here.

Leaving the lab, Solar shoved his hands into the pockets of his lab coat.

"Ruin?"

He called softly, going first into the living room, then into the kitchen, then into one of the bedrooms.

"Eclipse?"

But he wasn't here either.

"Jack?"

It seems that he was completely alone in the bunker.

Solar went through all the rooms once more to make sure that no one was here, and then returned to his lab, blocking the front door and turning on the sound insulation in the room.

He pulled off the worn gray cloth from a capsule, which was located in the depths of the lab and was securely disguised as a "garbage can" so that no one would have the desire to ask questions about what was there. Pushing aside some wooden crates, the mechanic looked at the horizontal capsule with regret in his eyes. Inside, under the glass, laid Sun. But not Sun of whose dimension they now live.

It was his Sun. It was Sunny. The one who was always kind to Solar when he first woke up in someone else's body and didn't understand why he was no longer part of Moon. The one who sacrificed his life in order for Solar to get a chance at his own. The mechanic shook his head, pushing away the obsessive thoughts. His gaze was determined.

He's going to get Sunny back. He will get Sunny back. He's sacrificed too much not to. His fingers quickly tapped on the keyboard of the hidden device in the capsule, and the light inside it lit up. Solar frowned in concentration as he immersed himself in his calculations. He has been working on restoring Sun for several months now- it was very dangerous to work when someone else was in the bunker. His plans could be discovered, so he had to do everything slowly and carefully.

Suddenly, the computer let out an approving beep. The inventor opened his eyes in surprise, looking at the big green check mark on the screen. Did… Did he do it..? Did he really succeed..?

With trembling hands, Solar typed a couple of commands, and a progress bar was displayed on the monitor, gradually filling in black. The mechanic pressed his palms against the glass of the capsule, watching with hope in his eyes as the light inside grew brighter.

“Download complete. All systems stabilized. All external modules running properly. Turn designation: ‘Sunny’ on?”

Solar pressed the confirmation button on the keyboard, staring in fascination as the animatronic in the capsule began to make soft noises. At first it was the crackle of electricity, then the noise of the fans, which became quieter almost immediately as he switched to silent mode.

Sunny opened his eyes.

At first, his eyes were cloudy, he heard only isolated sounds- an incomprehensible buzzing- and felt a heaviness all over his body. He saw a dark blue spot above him.

"Moon..?”

His vision began to clear, and the dark blue spot turned into a dark orange. Who is that? Sunny could say with confidence that this was the first time he’d seen such an animatronic model, but his gaze caught on a couple of details in the appearance, and he gasped.

"Eclipse..?"

Sun spoke with hesitance, still unsure of his assumption.

"Yes."

Solar replied in a quiet, trembling voice, feeling tears running down his cheeks.

"What… What happened?" Sunny asked in surprise, noticing out of the corner of his eye that he was lying in some kind of capsule, a lot of wires were plugged in all over his body. "There must be some mistake here..."

"What do you mean? You're alive, and that's good!"

Solar replied in euphoric disbelief, opening the lid of the capsule. "...You probably didn't understand me," Sunny smiled awkwardly, "the separation should have killed me. I knew I was going to die, but… I wanted to give you the opportunity to live in your own body, live your own life!..

Or..." Sun's gaze suddenly became sad and hesitant. "Or… Or are we both dead and this is the afterlife? Oh no- I'm so sorry- I never meant for this to happe-..."

"-No, no, it's okay! I'm alive, and you're alive too," Solar grabbed Sunny's hand so that he could feel his touch, squeezing it like he would leave him again if he dared to let go, "And I promise I won't let anything happen to you. Never again."

"...Wait!" Sunny suddenly realized something. Attempting to sit up, he rapidly looked around, whipping his head from side-to-side. But Solar restrained him from his attempts, holding Sunny still as carefully disconnected the capsule's wiring so that nothing would be damaged. "W- Where are we? Where’s Moon?!"

"Be careful! Your systems are still very fragile after such a long period of inactivity," the inventor replied, "I'll... I'll explain everything, just let me make sure you can move safely, okay?"

"...Solar, you're making me a little nervous. Where is our brother?"

Sunny asked his question once more, feeling a familiar anxiety slowly creeping up on his mechanisms, making its way under his endoskeleton and stirring the very core of the animatronic. Finally, he was able to sit up and look around. What kind of place is this…

"...Yes. Yes, you did die that day." Solar began with bitterness in his voice, trying not to look into Sunny's eyes as he recounted the memory. "It shocked both Moon and I, and it broke us, and then… And then..." the inventor's voice went tight as a lump formed his throat, forcing him to sound on the verge of tears as he continued.

"...His killcode took over his body. I couldn't save him, Sunny. There was an… accident." He bitterly squeezed out the words. "I'm Sorry, Sun. I'm so, so sorry. Moon is no longer with us."

The final statement hit Sunny like the crack of a painful whip. The whole world trembled right in front of his eyes. Shaking hands clutched at the face plate, despair flooding his features.

"...N-No... nononono, NO! T-This can't… It can't be..." Sun's voice warbled out in despair, "Please, tell me you're lying! T-That this is all a bad joke! PLEASE!"

Before Sunny could lose himself anymore, he felt thin and trembling arms wrap around his back. It was Solar.

Sunny buried his face in Solar's shoulder, shaking and sobbing like a traumatized child. He was absolutely shattered by the news. Moon was his day-one. His other half. His brother. The animatronic he was closest to before they separated and Eclipse appeared.

Gradually, slowly, the sobs in the air began to subside. A numb, pulsating sadness took the place of despair. Sun slightly pulled away from Solar and sighed loudly, causing his fans to flare up for a moment.

"But... What happened then..? H-How are we here?" He asked hollowly, looking at the mechanic.

"I had to conspire with dangerous criminals to survive. Working with them, I at least had a chance to get you back." Solar lowered the tone of his voice, "As of now, my name is no longer Eclipse. My name is Solar."

"Oh my God…" Sunny gasped in fright, taking Solar's face in his hands and looking at his rays. It was only now that he noticed how dirty and broken they were. "D- Did they do this to you? The criminals?!"

"No, no, I'm fine. They won't touch me, we have an… agreement," the inventor shook his head slightly, "But they must not find out about you. We're currently in a bunker under the pizzaplex. This is my lab, and we're in another dimension. But I promise we'll escape from here. I'll find a way.”

"B-But how can they not find out about me if they literally live here?" Sunny shivered, feeling fear creep up his spine. Poor Solar, what kind of mess did he get into..?

"Don't worry, they won't come into my lab. This is my personal space, and no one can come here without my permission." Solar took Sunny's hands in his own once more and looked into his eyes.

"Their names are Ruin and Eclipse. They're both very dangerous- Ruin can infect you with a virus that makes you want to kill, and Eclipse is just out of control when he's not in the mood- and he's always not in the mood. Knowing him, he'll tear you apart as soon as he sees you! Swear to me that you will not leave the lab under any circumstances. Please."

"Solar, I..." Sunny spoke quietly, confused and terrified eyes gazing into the tired and sad ones of the mechanic. "...I trust you. I promise that I will do whatever you say, and help in any way I can."

Cool guys don't look at the explosions

:3

One time Eclipse got caught by Moon. It didn't last for long though, a couple of minutes later the wall of the cell he was trapped in went KABOOM💣

Sure, when he's hungry

*manic cackling in the distance*

Sorry Bloodmoon you're not in this AU 😔

Eclipse does spend most of the time following Ruin's every step but there are some situations when he is on his own. Usually when Ruin is out of the bunker or locks himself in his room to work on some project

He also lets Eclipse wander around pizzaplex from time to time when feeling generous (After all, human meat helps Eclipse control himself much better)

Solar can go wherever he wants, he just chooses not to most of time