Pinkie Pie, Ghosts [spooky]

Pinkie Pie wasn't afraid. Ever since coming to the Everfree forest with her friends, she had realised that the tricks the dark wood played on their minds were just that, tricks. The ghosties in the wood couldn't faze her, and even the most terrifying beasts were just keeping themselves safe.
She trotted along cheerfully toward her goal, a pit which had been covered over many years ago by her friends after the mirror pool incident. Just thinking about it gave her the jeebies, so she shook the thought from her head and made her way toward the... hole...

"Huh? That's weird" she said, staring at the hole where a large boulder had been used to seal it. The boulder wasn't there, in fact, there was nothing there at all, it looked like a solid foot of everything around it had just... dissappeared. She poked her head down into the familiar cavern.
"Helloooooooooo~?" Pinkie called, her ears twitching slightly at the echo of her voice across the walls, remembering all to clearly the chant of her thousands of clones that had emnated from this very room.
When there was no response, she shrugged, and made her way into the cave, setting down her saddlebags by the entrance and trotting along to the water's edge. Nopony ever interrupted her here, in fact, she was fairly sure that most of the ponies she talked to had forgotten it even existed.
She gazed into the mirror pool, watching her reflection as it gazed back out of the water, peaceful silence enveloped the vast cavern as she stared into her eyes, watching the pale blue of her eyes disappear into the pink of her blinking eyelids. Wait, what?
"Oh, hello" said the reflection, prompting a gasp as she recoiled from the water's edge. Heart pounding, she stepped forward again, looking at her 'reflection' as she trotted around in the pool.
"W-who are you?" Pinkie asked tenatively, a little nervous. This had never happened before, and wasn't the mirror pool only supposed to create copies of her when she did the chant? It wasn't meant to happen like this, and why was she under the water like that?
"Oh, silly me! I forgot to introduce myself! I'm Pinkie Pie, well, one of the Pinkie Pies." the reflection smiled up at her from behind the glassy surface of the pool. Hadn't Twilight got them all? Pinkie was sure that there had been no clones left when they sealed up the mirror pool, but now she was here.
"I thought--"
"That Twilight zapped all of us? Yeah, she did, remember? You were the only one left on the outside, the last Pinkie Pie standing." chattered the Reflection, her mane bobbing as she spoke. "Buuuuuut, that's the thing, her spell was meant to send a reflection back to the mirror pool, because once the reflection arrived, it dissappeared. What silly Twilight didn't realise, was the consequences of failure, what would happen if she got the wrong one". A sigh echoed through the chamber, and Pinkie felt her face pale at what she was being told.
"But if you were teleported back, and you're one of my clones then..."
A snort, a giggle, and suddenly Pinkie felt herself drawn to the waters edge. She reached forward to press a hoof to the shimmering surface, and felt it instantly grabbed and yanked forward into the water.

"Silly, I'm not you're clone. You're mine."