Well, here it is, my first Danny Phantom fic and the biggest crossover I've ever done! Well, aside from in my mind. As I said, this will include Danny Phantom, Yu-yu Hakusho, American Dragon, Juniper Lee, Totally Spies, Sonic the Hedgehog, and Kingdom Hearts. I don't think there'll be a lot of romance in this but if there is the pairings are: DannySam, JakeJune, and HieiClover. Don't hate me or yell at me for the Hiei and Clover pairing cause I already know how stupid it is!

Hero League!

Summery: Danny Phantom, Hiei the three-eyed Samurai, Clover the spy, American Dragon Jake Long, Juniper Lee, Sonic the Hedgehog, and Keyblade master Sora have joined forces to fight against the forces of evil!

(1 year ago…)

Dr. George Smith, an old friend and colleague of Jack Fenton, had finally done what he had dreamed of his entire life.

While in college, his friend Jack worked on a portal to the Ghost Zone. But as for George Smith, he worked on a portal to other worlds far beyond the Ghost Zone. And now, after all these years, he had done it!

"Now…" He said to himself. "After all these years, I've finally opened a door to another world!" He activated the portal and stood back, as a bright blue light filled the room. "At last, I have succeeded!" But his success was short lived, because the blue light changed to dark shadows, which fell from the portal like water.

Smith gasped as he saw strange forms appear from the shadows. These forms stared at him with glowing yellow eyes.

Whatever these things were, George Smith had unleashed them… and Amity Park would never be the same.

(Present day…)

Danny felt a slight twinge of worry as he prepared to step out onto the stage. He may have had super-powers, but he had never managed to get rid of his stage fright.

He walked onto the stage, where his father, Jack Fenton, now owner of Fenton Industries, the biggest science institute/ghost hunting industry in Amity Park, was already speaking to several reporters. "And so," Said Jack. "Without further ado, it is my honor to present, Danny Phantom."

Danny walked up to the podium and looked out at the faces of the reporters.

Danny was now 18, and through the years Amity Park had grown to know and love him as the hero he was. (Even if they still got his name wrong.)

He would be talking about Fenton Industries newest project, which involved a new police force specializing in ghosts. With him in charge.

"Thanks for the welcome Mr. Fenton," He said. "And thank you all for coming. I would just like to say that I'm honored the city of Amity park chose me to lead the new Anti-Ghost Force. Now, do any of you have any questions?"

"Invisi-Bill?" One reporter called. "Is it true that Fenton Industries has invented a new type of ghost-fighting robot to assist you?"

"First of all, it's not Invisi-Bill. It's Danny Phantom! Second of all, yes, Fenton Industries has invented a special kind of robot to help me protect Amity Park. Next question?"

"I have a question Invisi-Bill!" another reporter called.

"(Sigh) what is it?"

"How do these robots work?"

"I think the person to answer that question is the guy who invented them. Dr. George Smith, the new head of Fenton Industries ghost-fighting weapons department."

Dr. Smith walked up to the podium. From his calm demeanor, you would never guess that just one year before he had had a terrifying experience.

"The robots," He began. "Which are called the Fenton Ghost-Hunters 5000, have been designed to be completely remote controlled, so that our human pilots can operate them from a safe distance. Using special Ecto-molecular technology, we have been able to give them most, if not all, of Danny Phantom's ghost powers. And each one comes equipped with a Fenton Thermos, for ghost capture and storage."

Another reporter stood up. "Is there any chance these robots could become a danger to the citizens of Amity Park?"

"None at all." Dr. Smith replied with a smile.

Meanwhile, in Spirit World, Koenma sat at his desk, looking over some paperwork.

"Sir," Said George the ogre, as he walked in. "He's here."

"Good," Said Koenma. "Send him in."

The ogre walked out. Soon after, Hiei walked in, looking very unhappy.

"You wanted to see me for some reason?" He asked.

"Yes," Koenma replied. "Please have a seat." Hiei remained standing. "Anyway, we've picked up some strange reading from our new portal scanner. It indicates that a portal is beginning to open in Amity Park. There is already a portal to the Ghost Zone there, but this one is not a portal there, here, or even to the demon world."

"So?" Hiei asked.

"I believe there may be a serious threat here. Not only to the human world but to all worlds as well."

"So?" Hiei asked again.

"So? So, I need you to check it out!"

"Humph! Why not get the detective and his idiot friend to do it? Or maybe Kurama has some free time."

"I would have sent them, but they are already on a mission."

"Well, you're out of luck then. I'm not one of your minions." Hiei prepared to leave, but Koenma stopped him.

"I intend to pay you for your services. It's a simple job Hiei, and if you do it, I'll be inclined to erase your criminal record." Hiei turned to face Koenma's face, still not quite used to seeing him with that stupid pacifier. "I could erase your criminal record and make you free of any obligation to me or anyone else. You've helped save the world enough times for me to trust you not to commit crimes too terrible. All you have to do is do this one job, and you'd never have to see me again."

Hiei considered it for a moment. Then said to Koenma, "When do I leave?"

Okay, there's the start. See ya next time. Send reviews but no flames!