Danny was cruising through the ghost zone with Sam and Tucker right behind him in the specter speeder when Danny crashed into a blue door. His curiosity increased even more when he snapped his fingers and the doors opened. Knowing the door would probably be open for about 20 more minutes, he had Sam and Tucker come out of the specter speeder. Both agreed to come with Danny. The little group stepped thru the strange door.
The Doctor was minding his own business when 3 strangers appeared –quite literally- out of nowhere. One of the strangers had white hair, glowing green eyes, and was wearing a black and white full body suit. The girl in the group had black hair, violet e eyes, and wore a black shirt with a purple skirt. The last of the group was a boy wearing a red beret, had glasses, a yellow long-sleeved shirt, and khaki pants. The Doctor could only place who the last person was. Then it dawned on him. They were the people that he had studied ever since he went into the future.
"Why is that guy staring at us like that?" asked Sam. "Probably because we appeared out of nowhere." explained Tucker. Only Danny hadn't spoken. Then the strange man spoke. "Let me guess: the person with white hair is Danny Phantom aka Danny Fenton. The girls name is Samantha "Sam" Manson and you are Tucker Foley." said the strange man. "Uh…what are you talking about? Who is this Danny Fenton you speak of?" said Danny. "Quit the act. I already know that I'm right. You don't have to lie in front of me. I promise I won't tell anyone your secret." said the strange man. "By the way, I'm The Doctor." "Doctor what?" asked Tucker and Sam together. "Just The Doctor" said the man. "What is this place?" asked Danny, asking the question they all wanted to know. "You are in my time machine" replied The Doctor. Danny, Sam, and Tucker mouths dropped open. This was the person that Clockwork said could save the world. According to an ancient prophecy, stated by the oldest ghost ever, a man wielding a time machine would save the world from a great battle that would trail across the cosmos. Even Clockwork was afraid of the great battle, which showed how bad it was.
The Doctor heard the prophecy, after telling them how he knew them. "I know who you all are because you all become the best ghost hunters in history. Tucker makes the best technology on Earth for your team. Sam partners with Danny to fight ghosts. Your children eventually find out who you are and join the team. You create the future generations of ghost hunters that protect this world from evil. All you learned is passed from generation to generation until the end of time. Your team saves Earth various times. One time includes Clockwork helping you in this tremendous battle, which I am guessing is part of the prophecy. Am I right?" he asked. The prophecy also included a ghost, 1 man, and 2 teenagers saving the world. They all nodded yes. "Well then, lets get you home so history can continue." He said as he pressed a few buttons. They heard a whirring sound and a huge bump. When The Doctor opened the doors of the TARDIS, they were in the Fenton's basement with the specter speeder beside the TARDIS. "Well, Ill see you all later then" he said. "Thank you" Danny said, before the doors closed. "No problem. Here's my phone number so you can call me when the battle starts. Goodbye." said The Doctor as he handed Danny a piece of paper. Then he walked slowly back to the TARDIS, leaving the teenagers behind as the doors closed. The teens heard a whirring sound, and the TARDIS just disappeared. The Doctor was saddened deeply, because he had no companion. Then the phone rang. "Yes? I'll be right there" he said with a small grin on his face. The time for battle had begun.
Authors note: I did this story because I really wanted to do a Danny phantom/Doctor Who crossover because I thought it would be cool to have the Doctor and Danny to meet
Disclaimer: I don't own the shows. If I did, I would have made them meet in an episode already