Hi! This is a three way crossover between DP, ROTG, and The Nightmare Before Christmas, and I son't own anything but the idea.
Enjoy!

A robed figure with an ectoplasmic green scythe in hand silently floated beside a tall skeleton, Jack Skellington to be exact. Two ghost dogs, one green and one a translucent white, trailed behind the two figures, very quiet for being dogs. Jack smiled and waved at a rag doll-like redhead, who waved back, a smile on her face.

"Sally!" Exclaimed Jack to the redheaded rag doll, obviously happy to see his girlfriend. The robed figure raised it's free hand white gloved hand to wave at Sally, scythe in the other hand. "How nice to see you!" Under the hood of the robe, ectoplasmic green eyes, a bit dull though, shone through.

"Hey, Sally." Said the robed figure in a kind, male voice. Using his free gloved hand, the mysterious figure pulled down his hood, revealing white hair that put snow to shame, a silver jumpsuit collar, tannish skin, and dulled ectoplasmic green eyes. Danny Phantom, Jack Skellington's apprentice in being the pumpkin king was shown to be the robed, hooded, figure.

"Jack, Danny! How nice to see you!" Exclaimed Sally, now right in front of Jack. Danny cleared his throat, and the couple turned to look at him.

"I have to go for a bit." The skeleton nodded, and Danny whistled. "Come on, Cujo, boy, we have to go." The green dog floated beside his master, and both disappeared into the woods, Jack sighing after the two left, and Sally cupping his face, making him look at her.

"It's alright, Jack," Said Sally. "I'm sure he'll be scaring with a joyous attitude in no time." Another sigh escaped Jack.

"I know, Sally," Said Jack, taking a glance in the direction his apprentice and his dog took off in. "But all these years in a row, he gets so glum, and so close to Halloween, then comes back with a smile. If he would just say what's on his mind right now…" Jack trailed off, letting the words hang in the air. The couple then stepped into a building to check on the progress for Halloween, just to take their minds off the wayward acting apprentice, if only for a while.

~-~
Danny Phantom sat, knees to his chest, at the edge of a lake frozen in Burgess, ignoring the cold. His ice core made it feel normal, after all. Using his Cryokinesis, he made a few faces with the ghostly ice emitting from his hand, then changing the faces. A girl's face who had short hair and amethyst eyes, a boy with glasses and a beret, a woman with short hair and kind eyes, a man with black hair, slowly turning white due to age, another girl with a headband, kind eyes and smile, along with long hair, and finally, a young girl's face that looked like a younger, female version of himself.

'Sam, Tucker, Mom, Dad, Jazz, Dani…' he thought to himself. 'Another year, and I'm sorry for leaving. But it was for the best.' It was for the best… right? A sigh escaped the former halfa, courtesy of Clockwork, and a few tears sprung from his eyes.

A laugh disrupted the mourning. Wiping tears and turning around, Danny saw the one spirit he dreaded at this time of year. What was Jack Frost doing here? Oh, wait, frozen lake, funny fern-patterned frost everywhere… Danny was at Jack's lake, in Burgess. Wow, he made it far...

The laugh abruptly stopped, and then, Jack's voice rung out. "Danny! Hi! Why are you at my lake?" At this moment, both white haired teens were staring at each other, blue meeting dull green, curiosity meeting sadness. At last, Jack noticed Danny's glum look.

"What's wrong?" Asked Jack, and Danny lifted his feet off the ground. Then, quickly, the white haired phantom started to fly away. Jack immediately called on Wind to get to his friend.

The chase was on.

Oh, no, a cliffy!
Update's may be a wee-bit slow.
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