"What... How?!?" Twilight was utterly shocked and completely speechless, but then something clicked in her brain. "You're not real. You must be a figment of my imagination."
"What?" Responded Sweetie Bell, "Of course I'm real, why wouldn't I be?"
"I've been alone for a long time, why would random ponies show up all of a sudden?" Clearly Sweetie Bell had to be a figment of Twilight's imagination. It doesn't make any sense why a pony would randomly appear. Twilight slid the blade away and began walking back towards her cave.
"Hey wait up!" Said Sweetie Bell, who began following Twilight. "Where are we going?" She asked.
"To my cave."
"You live in a cave?" Sweetie Bell seemed confused.
"Yes I do." Responded Twilght, sounding a little offended.
"Why?"
"Because it didn't seem right rebuilding the library."
"What do you mean rebuild?" Asked Sweetie Bell. Twilight stopped in front of her door. She would have to explain everything. Twilight opened her door and walked inside, Sweetie Bell followed. "Wow! Sweetie Bell was clearly impressed. "You did all of this?"
"Just the marks on the wall, the bed, the journal and the windows... Or, window really." Twilight began unpacking her saddle bags and she slipped off her C.L.A.M.P.
"What's that?" Asked Sweetie Bell curiously.
"It's my C.L.A.M.P."
"Your what?"
"Clamping, limbic, applicable, mechanical, processor. Basically it lets me pick up stuff without my magic."
"Why can't you use your magic?"
"Long story." Twilight really didn't feel like getting into details. "Wait a second... Why am I explaining this to you? You're not real." Twilight opened her journal and wrote the usual entry but this time added, "hallucinations have begun" to the end.
"Yes I am!" Sweetie Bell stomped her hoof on the ground. "Why don't you think I'm real?" Twilight set the C.L.A.M.P
"Read my journal."
"What?" Sweetie Bell sounded impatient.
"Read my journal, It'll tell you everything you need to know." Twilight slipped into her bed and shut her eyes.
"Woah." Twilight turned her head and saw Sweetie Bell looking up at the wall of marks. "Can you add another one for me?" Twilight asked. Sweetie Bell looked over at the piece of chalk sitting on the desk next to Twilight's bed. She squinted her face and the chalk was lifted in the air, surrounded in a light blue, sparkling aura. Twilight lifted her head. She hasn't seen magic used properly in a long time. There was a scraping noise and the 4,758th mark was complete. Twilight felt a smile try to break its way through her emotional barrier. She turned her head away before it appeared. Twilight heard the thud of her journal being opened and the scrape of a stool moving across the floor. Soon Twilight was asleep.
Twilight was utterly surprised to find she didn't wake up covered in sweat, panting from fear. She woke up like she did thirteen years and one day ago. Completely normally. Twiligt flicked her eyes open and looked behind her, she saw Sweetie Bell, face down against the desk, day 4,758's page in her journal was open but "hallucinations have begun" was crossed out. Twilight smiled and began packing, she slipped on her C.L.A.M.P and draped her blanked over Sweetie Bell's back. Twilight stood there for a second, looking at her sleeping face. maybe she is real Twilight thought to herself. She snapped out of it, slipped on her saddle bags and left. After another long day of helping out at sweet apple acres, visiting her friends, looking for more window panes and waiting at Pinkie's door. She now made it fully to her door but she still couldn't bring herself to open it. Twilight made it back home. She opened the door and saw Sweetie Bell sweeping dirt and dust into the hole in the corner of he room.
"Hey! I was just cleaning up a bit. Thanks for the blanket by the way." Sweetie Bell gestured to the bed which was neatly made and wrinkle free.
"Wow you did a great job." Twilight smiled as she looked around the room. All of the rocks and dirt was gone, twilight also noticed she was standing on a straw welcome mat with the words, "bless this mess" written in chalk.
"Thanks! Not bad for somepony who doesn't exist." Sweetie Bell smirked at Twilight.
"Don't get cocky." Twilight set down her saddle bags.
"Ummm... Twilight?"
"Yeah?"
"What did you mean by, do some maintenance on Rainbow Dash?" Twilight dropped the saddle bags.
"I'll show you tomorrow, right now we have some work to do!" Twilight picked up a rock.
"Umm... What do you mean." Twilight threw the rock at Sweetie Bell. "Away!" Sweetie Bell ducked as the rock hit the wall. "What was that for!?" She screamed at Twilight.
"We need to work on your magic, I saw your attempt to mark the wall," Twilight looked over at the squiggly line on the wall. "If you're gonna stay for a while, you need to educate yourself, and I happen to be the perfect tutor."
"But you said you magic doesn't work anymore." Said Sweetie Bell. "Or at least your journal did."
Twilight was offended on a very high level. "Just because I can't do it, doesn't mean I don't know how to do it." Twilight trotted over to the rock and picked it up again, "when I throw it this time I want you to focus on the rock as soon as it leaves my hoof. Imagine a Barrie between you and me, ready?"
"I guess?" Sweetie Bell squinted her eyes and bent her knees in preparation. Twilght threw the rock, Sweetie Bell squinted even more and the rock slowly came to a stop in mid air.
"Yes!" Twiligt shouted, her voice cracked again.
"I did it!!!" Twilight watched as Sweetie Bell jumped around, happiness and pride on her face. Twilight smiled, feeling the same pride.
"All right enough celebrating, we've got a lot of work to do." Sweetie Bell got in the same prepared position, her expression made her look like she could take on the world.