Derpy awakened at midnight.
An alicorn was staring down at her.
"What is it?" Derpy turned her head so that the side of her face was facing the alicorn.
"Oh, so you want to know why I am here?" The alicorn smiled evilly. "So know this, I am banishing everypony one by one to a different planet. AND YOU ARE THE FIRST!"
Derpy, for once had no need to think twice.
"AHHHHHHHHH! AN ALICORN! WANTS TO BANISH ME TO SOME PLANET! AFTER ME SHE IS GOING TO BANISH EVERYPONY TO A DIFFERENT PLANET! HEEEEEEEEEEEELLLLLLLPPPPP!"
"Now I shall silence you forever!" The alicorn worked up her magic and casted the spell.
Derpy, knowing she had seconds until she was banished forever, aimed a kick at the alicorn's face- but because of her bad eye sight it hit the alicorn's horn and knocked the alicorn to the floor.
But she was to late, the spell was already casted and Derpy vanished, and reappeared in the moon.
Just that moment, the mane six bursted into Derpy's house.
"Where is she- Who Ever You Are?"
"My name is Shadow Enclosed, and I shall banish you all like I did with your precious friend!" The alicorn replied.
"Whatever you say..." Muttered Rainbow Dash rolling her eyes.
Then the battle began. Twilight summoned the elements of harmony, the six Powys make a giant rainbow out of the power of the elements of harmony and Shadow Enclosed screams no as she is destroyed.
"Do you think we can get Derpy?" Rainbow Dash asked.
"I don't know for certain, because I still don't know where she is." Twilight answered.
"Well, can you find out?" Fluttershy asked ever so quietly.
"Yes." Twilight scanned the whole universe with he magic. "Derpy is in the moon, stuck for one thousand years. We cannot save her." Twilight was exhausted.
ONE THOUSAND YEARS LATER
Derpy blinked constantly, she had not seen sunlight for one thousand years!
It was a relief to be in Equestria again after one thousand years of being enclosed in shadows and darkness.
Derpy flew through the meadows and bumped into- Twilight.
"Um, who are you?"
"Don't you remember me? I'm Derpy Hooves!" Answered Derpy.
"Uh... How are you alive now, after one thousand years?" Twilight asked.
"Well once I got lost in Discord's cave, and he asked me if I'd like a Derp Muffin. I still loved muffins back then, so I took it gratefully. It derped me up and gave me immorality. And here I am, the same derp as I was back then." Derpy answered.
"Well you aren't old!" Twilight retorted.
"Twilight, have you ever heard that growth does not exist on the moon?"
"Yes, but-"
"Well I just proved that it works for INSIDE the moon as well." Derpy answered.
"Okay-"
Derpy was gone, being a derp somewhere else.