This story is mentioned in Kanto 30: The Belle of the Spirits.

Summer: The Beckoning

Mt. Pyre, the resting place for Pokémon and people in the Hoenn Region. Near the famed Lilycove City, it is an island in Lilycove Bay. The graves are separated into two areas: the tower and the hills, where the upper levels are covered in constant fog. During a week in early October, families pay their respects by visiting the graves and offering treats to the dead and sharing good memories. Although Mt. Pyre is a peaceful place, not all of the spirits are resting in peace.

One day, a young girl at the age of seven visited Mt. Pyre with her parents. She wore a white dress decorated with blue lace, and her long, black hair was tied into a ponytail. She lightly skipped as she held her mother's hand tightly. She knew of the importance of Mt. Pyre from her parents, as their Pokémon were laid to rest in the bottom floor of the tower. When they arrived at their first headstone, the three gave a small prayer and offered Pokéblocks and Berries.

As they were about to go to the next headstone, the girl heard someone with a sweet, soft voice behind her say, "Hi there. Wanna play?"

The girl turned around and saw another girl around her age standing behind her. She wore a pink dress, which complemented her light blue eyes and long, curly blonde hair.

"Umm…I wish I could, but I should follow my parents," the white-dress girl replied.

The girl in the pink dress gave a sweet smile. "Don't worry. It's just a quick game of tag."

Despite her better judgment, the white-dress girl loved to play tag. "Well, okay. Here I come!"

The girl in the pink dress giggled and ran outside to the outdoor graves. The white-dress girl happily followed her and they chased after each other for hours. The girl in the pink dress kept running higher and higher up the mountain, but the white-dress girl didn't seem to notice. When they reached the top, the thick fog made the girl in the pink dress disappear.

"Now where did she go?" the white-dress girl asked, looking around the headstones.

She then heard two soft Pokémon cries behind her. She turned around and saw an orange fox with six tails and round, floating blue bell with a match wind chime looking innocently at her.

"Oh, how cute! A Vulpix and a Chimecho!" she squealed. She excitedly approached the cute Pokémon and knelt down. "What are you two doing here?"

As she reached out her right hand to pet them, the two suddenly glared at her with purple eyes. The white-dress girl tried to retreat and stand, but her body was frozen from the glares of the menacing-looking Pokémon. Her eyes widened with fear as the two Pokémon lifted their heads, causing her to stand against her will.

The girl in the pink dress appeared behind them and laughed. The pupils in her blue eyes disappeared, and her sweet smile changed into a sinister grin. "Finally, a new playmate!" she happily shouted.

"W-what's going on?" the white-dress girl exclaimed, shocked at the turn of events. "W-who are you? L-let me g-go! I want to leave!"

"YOU CAN NEVER LEAVE!" the girl in the pink dress shouted in a deeper voice.

The Vulpix and Chimecho then motioned their heads to the west. The white-dress girl struggled, but her body obeyed the Pokémon's commands. She tried to scream to get someone's attention, but no words came out.

As she unwillingly marched towards the girl in the pink dress, she noticed her oppressor was floating over the grass. She then realized the girl in the pink dress was an evil spirit. Getting closer to the edge of the mountain, the blonde girl slowly floated over the sea and wiggled her right index finger.

Accepting her fate, the white-dress girl sadly thought as she slowly lost consciousness, Why didn't I follow my parents? My dreams…won't ever come true… Please…someone… Save…me…

The white dress girl slowly opened her eyes. She was able to move her fingers and found herself lying on the mountain.

"Are you all right, young one?" an elderly male voice kindly asked.

The girl sat up and saw an elderly couple watching her.

"Y-yeah…I'm fine…" she replied, still shaken by the earlier events.

Why didn't I die? I…guess it doesn't matter now. I can fulfill my dream…and see my family again.

She saw her parents frantically running towards her. Once they hugged their child, their tears fell down her cheeks. She happily embraced them, relieved to see them again.

Out of earshot the elderly man worried whispered to his wife, "It must be her. I'm not sure we can tolerate her anymore."

"Don't worry too much, my dear," she whispered back. "Our Pokémon will monitor her presence. And her Pokémon, too."

"I do hope you're right, my love…"

"How close…" the girl in the pink dress said disappointedly as she watched from behind some headstones a few yards away. Her Vulpix and Chimecho glared angrily at the elderly couple's invisible Pokémon, who interrupted their hypnotic stares and saved their target.

"Don't worry my friends, she'll return. And when she does…" she snickered evilly. "we will be together again…"