Based on the song "Come Little Children" Sequel: Nightmare Night: What happened to Spooky
There is a mysterious filly in the town of Ponyville. She was rumored to be struck by lightning, and she magically appeared in the box Rainbow Dash herself found in Fillydelphia on weather patrol. She had wings, no name, and plenty of rumors about her. Nobody knows where she came from, when she got there, and how she got here.
Take me away
Everybody started to rumor about the Nightmare Night coincedence. They said the filly was struck by lightning and then magically appeared in the box Rainbow found. Whenever they saw that filly, they teased her, "That little filly ALWAYS has nightmares, because she always has NIGHTMARE NIGHT!" Rainbow would always do her look at them when they teashed her. Tonight was nightmare night, and she came on that same day, saying that it was her birthday.
The time's come to play in my garden of shadows
When Rainbow Dash put that little filly to sleep, when she went to check on her 5 minutes later, she had disappeared! No trace of her lay anywhere, and she went out to see. The little filly walked and was drawn to a song - a very particular one - being sung by Luna. When Rainbow Dash saw Spooky, she held her back. "Get back here, Spooky!" Rainbow Dash commanded. She was as scared as a toddler forced to watch a horror movie in the dark. Spooky just kept on slowly walking, and when she finally realized Rainbow Dash was holding her back, she beat her wings slowly and Spooky levitated, right when Rainbow Dash heard a song. "Come Little Children, and take me away, into a land of enchantment. Come Little Children, the time's come to play in my garden of shadows."
Come Little Children
After the children reached Luna, she took them to the moon, with magic from her horn. She sang it again. "Come Little Children, take me away into a land of enchantment, come little children, the time's come to play, in my garden of shadows. Oooooooooo!" After that they never saw Spooky again. But Luna knows what happened. You can ask her, and she will tell you what happened to Spooky.
THE END