I don't own Danny Phantom.

I came up with this idea after watching The Ultimate Enemy, and decided it would be interesting. What can I say. Enjoy.

All ghosts in the Ghost Zone knew of Danny Phantom, with the exception of two.

A battle was raging between these two ghosts had been going on for centuries, much to the annoyance of the others. It was an almost fair battle, but no one knew how to stop it.

"It's the end of you, Erin. You will submit," one of the ghosts said before shooting green blasts out of his hands. He was glowing green with white pants with suspenders being the only clothing he wore. His green hair was long and flowing behind him as he carefully aimed his shot at the other ghost.

Erin moved quickly, dogging the shot. Her green eyes narrowed at the other ghost, whose own red eyes were glaring at her. Her long white hair tied up in a ponytail floating behind her. Her black armor hung tightly to her body. On her right wrist was a glowing green bracelet.

"You want me gone so bad then do as I ask Jarrett," Erin yelled throwing her own blast at him.

Jarrett moved slightly to just miss the blast, but little did he know that another was already on its way. It hit him in the chest and knocked him directly through a strange portal neither had noticed before. Erin eyed the portal warily before heading through it to finish this battle.

Danny Fenton was in his parent's lab with his two friends, Sam and Tucker, about to release the Box Ghost back into the Ghost Zone for the thousandth time. Somehow he kept getting out.

"Danny, have you ever thought about just leaving him in there?" Tucker asked pointing at the Fenton Thermos. Danny turned back to his friends and shrugged.

"Of course, but that would be wrong. Besides, he gives me a chance to test out my ghost powers."

Danny stepped up to the portal and was about to release the ghost when he felt his ghost sense kick in. A ghost was approaching, and fast.

So fast in fact that it ran into him, knocking him across the room and accidentally releasing the Box Ghost back into the human world.

"Uh…what? Um…Beware!" the Box Ghost said before disappearing through the wall and out of the building.

No one really noticed thought, because the interesting sight of Danny against the wall with a buff ghost next to him was taking all the attention away from everything else.

Danny was the first to wake up. "What happened?"

Jarrett also awoke. "That crazy bitch," he said before standing staring at the other people in the room.

"Who are you?" he said angrily pointing at Sam and Tucker.

Danny finally stood and took in the sight before him. A ghost was pointing his finger at his friends.

"Hey man, back away from my friends," he said, drawing the ghost's attention. Jarrett turned to the human boy and laughed.

"I am Jarrett, Future Lord of the Ghost Zone, left region. I cannot be taken down by a mere mortal boy such as yourself," the ghost said with a chuckle.

Danny felt the power rush through him as he changed from human to ghost. Jarrett watched astonished as the transformation took place.

When Danny Fenton had become Danny Phantom, Jarrett took a step back in shock.

"It's impossible. There is no way a halfa can exist. I thought I made sure of that."

"I guess you didn't do such a good job after all," Danny said before preparing to blast him. However, Jarrett was knocked to the side by another green blast. Danny, Sam, and Tucker all looked up at the Ghost portal. There stood a gorgeous girl with snow-white hair, and glowing green eyes. Her hands were still glowing green from the blast she had just sent out.

"So afraid of me Jarrett that you have to run to an alternate dimension to avoid me?" she said forcefully as Jarrett lifted himself up from where he had fallen.

"An alternate dimension? I think not dear Erin. This is the real world," Jarrett said.

The reaction he got was exactly what he wanted. Erin gasped before taking a step back and looking around. Jarrett quickly moved next to her before blasting her right side strongly.

Erin was slammed into the opposite wall as Jarrett laughed before disappearing out of the house to explore this new world.

Danny approached the girl, still in his ghost form in case anything happened, who was still out from the knock against the wall.

Erin stirred slightly. She was in pain, something she thought was impossible. Her eyes fluttered open and looked directly into glowing green eyes, just like her own.

Erin jumped up, wincing at the pain. Danny eyed her with some suspicion. Never before had he noticed that a ghost could be in pain. It was quite strange.

"What happened?" she said quietly. "Who are you and why do you look like a halfa?"

Danny rolled his eyes. He thought that in four years every ghost in the Ghost Zone would know about him. "That Jarrett ghost knocked you out before disappearing. My name is Danny Phantom, also known as Danny Fenton."

Danny changed back into his human form causing Erin's eyes to widen.

"How the hell did you do that?"

Sam and Tucker walked forward at this point. "Well," Sam said, "he is half-ghost."

"Half-ghost…I knew it." Erin was smiling now looking around at the lab. "This is the real world. I am finally free of that Ghost Zone."

"Whoa, you have to go back," Danny said taking a step forward. Erin turned to him with shock in her eyes.

"But I've been fighting for my freedom for so long and you think I can just go back to that damn Ghost Zone like nothing matters. I don't belong there, and now that I'm out…I can do what I couldn't before."

Erin reached for the bracelet on her wrist. The glowing green light around it had disappeared. She grabbed the bracelet and tugged it off her wrist.

A bright light surrounded her as she tossed the bracelet into the Ghost portal. When she turned back to Danny and the others, she wasn't a ghost anymore.

Her hair was still light, only now it was blonde. Her eyes had changed to hazel and her armor had changed to a green dress with off the shoulders sleeves, tight bodice, and flowing skirt. Her hair was down in thick curls. She looked quite beautiful. Both Danny and Tucker were ready to swoon. Sam was the only one with her wits still about her.

"How did you do that?"

Erin was so happy that she spinned around before answering Sam. "I had forgotten what it was like. My name is Erin Evans, and if you hadn't guessed…I'm a halfa…half-ghost, half-human, and I have been stuck in the Ghost Zone fighting that bastard Jarrett, who came and placed a bracelet on my wrist keeping me in my ghost form, hoping to marry me. I refused and we have been fighting ever since."

"Wait a minute…you're half-ghost too?" Danny yelled, finally coming too enough to grasp the whole conversation.

Erin nodded. Danny was in shock. "How the hell did that happen?"