Not a Halloween story, but it does have ghosts so that counts for something right?
Make a Wish
Desiree hovered next to the ghost portal, wishing the doors would open, wishing she was strong enough to break through, wishing she could grant her own wishes. She supposed she could give herself power boost by granting someone else's wish, but that would require another ghost coming along and making a wish. Ghosts in the Ghost Zone knew how Desiree liked to twist their words and were always careful to avoid using the word "wish" around her.
Just then, another ghost wandered into the area. This wasn't just any ghost; this was a Pure Spirit. She was marked as such by her white glow and golden halo. Pure Spirits are incredibly rare. If Skulker had been there, he would have had a field day.
Desiree didn't care about that, however. She just hoped to be able to get this ghost to make a wish.
Trying to look friendly, Desiree floated over to the other ghost and said, "Hello there."
Apparently the other ghost didn't know Desiree, for she smiled and cheerfully responded, "Hi, my name's Maria! What's yours?"
"My name is uh… Mary! Yes, Mary." Desiree didn't want to give away her true name just in case this strange ghost had heard of her after all.
"Nice to meet you Mary. Do you want to be friends?" Maria looked at Desiree with a hopeful expression.
Desiree couldn't believe how easy this was. "Of course we can be friends. Why don't you help me get to know you by telling me your biggest dream?"
Maria's expression first brightened, then turned faintly sad. "My biggest dream was to go to Mobius with my friend, Shadow." She sighed. "But then, I died and he had to go without me."
Sensing she was getting close, Desiree pushed a little more. "Do you miss him?"
"Oh very much! I know he misses me too; he was so upset when I died." Another sigh. "Sometimes I wish…"
Desiree tensed. This was it. "Go on."
"Sometimes I wish that I could live on Mobius so that Shadow wouldn't have to miss me anymore."
Desiree thought quickly, looking for ways to ruin the wish while still giving exactly Maria what she asked for. It only took a second. She could change Maria so Shadow wouldn't recognize her and she could take Maria's memories. Maria's wish would be granted, but neither she nor Shadow would know it.
Desiree proclaimed, "Your wish is my command," and sent Maria away in a cloud of green smoke.
As the wish was granted, Desiree felt power fill her. Now she could get through the ghost portal. Just in time for the meteor shower too.
This is just my theory for how Maria came back as a hedgehog with no memory. What Desiree doesn't know is that Shadow is a hedgehog too.
