Pinkie flew through the palace slamming open doors with the power of her horn.
"Jeez so much for covering me" she thought bitterly, zipping around another corner. She glanced back and huffed as the guards closed in.
"Stop right there!" the pegastallion demanded.
"why? you all are so fast!" she taunted, "but even you can't catch me if I do this!" Pinkie folded her wings against her body and back flipped in the air. Turning 180 degrees on to her back, she spread her bird like wings wide and rushed the guards. Folding her wings again as she passed them, Pinkie righted her self and bolted in the direction she had just come from.
The guards, momentarily confused by the pink Alicorn's actions, quickly regained their wits and hurried after her.
Pinkie zipped around corners and flew high and low trying to throw off her pursuers. She chanced looking over her shoulder again and giggled when she didn't see any of the guards. Taking a moment to catch her breath, she slowed to a steady gallop and came to a stop behind a pillar.
"She's got to be here somewhere! Tell the back ups to get in here! The night Guards too! have them barricade the windows and doors!" The captain's voice rang throughout the halls. Pinkie Stretched her wings and prepared to take flight again. The steady broosh of the pegastallions' wings was growing closer.
Why couldn't you have kept your word? she thought angerly as the guards spotted her.
This had started out fun, but now she was getting worried. Pinkie knew she would be caught soon and death would most likely follow. She turned and stuck her tongue out at the man behind her. Oh well, got to make this as fun as possible while i can! She zipped around another corner and ran smack in to Celestia. The sun Alicorn stared down at her, almost pitifully.
"Oh Tia! Am i glad to see you! Sheesh your guards play a mean game of tag! But my wings are getting tired and I'm getting bored so could you call them off? We can play again tomorrow if they'd like." Pinkie stood and smiled innocently as she could. Looking around, she saw that the guards had surrounded her. "Now would be a really good time." She said, smiling through gritted teeth. Pinkie stood tall and looked up at Celestia. She was small compared to Celestia, even small compared to Luna really, but she had the arrogance of a grown pony. Pinkie scoffed as the Princess looked her straight in the eye.
"Ensure that she does not escape until a proper punishment can be assigned." Celestia's voice was almost cocky as she gave the demand. Chains immediately began to fall over the young alicorn, restricting her wings and weighing her down. Pinkie strained, shocked as Celestia walked away casually. As she was restrained and dragged away, she grunted a word that almost sounded like 'Traitor'

"Please princess, show mercy!" Pinkie Stared at her friend as the ruling came to an end. There had been no jury. No trial. Pinkie had been caught red handed. She knew there was no way out of it but...
"Banishment as an earth pony? I'd rather it be death!" Pinkie strained against the shackles holding her firmly to the floor.
"Our word is final Pinkie. You above all others should know that." Luna looked down upon her with distaste.
"But why not kill me, or if banishment truly is the choice can I not be made in to an unicorn?" she cried.
"You are too dangerous with magic. Even the magic of an unicorn is deadly if handled wrong, and we cant have you coming back here so pegasus is out of the question too." Luna's horn glowed as she absorbed the power of her friend. Pinkie screamed as her wings folded in impossible ways towards her spine until her back showed no trace of them.
"You know I will never forgive you for this." Pinkie spat as her body twitched with pain.
"Ten thousand years. A hundred for every Alicorn you mindlessly slaughtered. That is the agreed length of your banishment. In that time you will use no magic and be restricted to the ground. You will live the average life span of a pony, and be reborn again and again until your time is up. You may come to forget your time with us, but you will never be allowed to forget your crimes." Luna sighed and walked closer to the young Alicorn. "How these disgusting acts went unnoticed is beyond us, but-"
Pinkie cut her off with a sharp laugh. "You two liked the desserts well enough! Especially the cupcakes! Those were your favorite, right Lun-" Pinkie writhed and grit her teeth as her horn slowly corkscrewed into her scull. Luna's magic was strong; making an alicorn in to a mear land pony. Pinkie smirked as the clouds opened beside her.
"Celestia is just making you do her dirty work. when you become more powerful than her, she will rid this land of you too." pinkie stared at the break in the clouds and looked up at the blue mare.
"Luna, we can stop her. Please give me back my things, give me back my power and we can rule this land together." pinkie began to panic as the reality of her punishment hit her. "Luna, my friend, my sister, please!"
Luna sadly approached the now shrunken and pitiful land pony and nuzzled her. "Perhaps you will learn something in these years, my friend." she stepped back as the bonds began to drag pinkie towards the hole. "Something, I pray, other than causing pain."
Luna looked away as pinkie's scream fell away from her. She knew her friend may not survive the fall, but handing out punishment was an important duty of the princess.
"Sister?" she approached Celestia and the two stood facing each other for a moment. "Sister, will she be alright?"
Celestia hugged her and smiled sadly, "It had to be done."
The big sister began walking out of the room at a leisurely pace. She seemed completely unfazed by every thing that had happened. Luna contemplated what pinkie had said for a while "Sister? How did the crimes go on for so long unnoticed? Surely some pony must have complained or worried?"
Celestia smiled over her shoulder and simply replied "The problem has been taken care of, little sister. There is no more need to fret."