There was Phantom Planet.
Sorry if it's awful. Did it late, I was tired and need to sleep!

Disclaimer!

I do NOT own Danny Phantom or Harry Potter. They belong to Birch Hartman and J. K. Rowling.

Onto this.

All Sirius could remember was fighting Lucius Malfoy with Harry by his side before beating him, getting hit by his cousin, Bellatrix and seeing Harry's scared face. Everything after that... Going through the Veil... Nothing. Nothing but black. (AN: Sirius Black... I'm sorry back to the story.)

He floated through the 'veil' as wizards call it. Through this unknown death land, as they declared it. What else can you name a place that no one comes back out alive as? He knew he was going to die. At least he saw Harry's face before he passed.

'Well... This is... I don't know exactly... I've never experienced death before. or at least the moments before death.' Sirius thought. ' In fact, I thought it would be more... I don't know... I don't know!' He paused in this thinking. Eyes closed unknowingly. 'Speaking of which... Whats going to happen now?' The adrenalin of the fight wearing off rapidly.

"Hello?" A young, male voice called. Sirius now getting the pain hit him couldn't open his mouth. 'A... voice?'

"Oh God, oh God!" It was really close now... Maybe a few feet in front of him. Slowly he opened his eyes, He was floating on his back in a green swirled place, with nothing but doors far away and rocks here and there scattered about randomly. He couldn't focus his vision. Too blurry...

"A human? What are you..." The voice muttered to himself. "Can you hear me, sir?" He asked more confidently but obviously worried about this stranger he just found. Sirius looked towards the voice having to turn his head numbly. He looked at the voices' body and as expected, it was a kid, about 15. Same as Harry... Harry... The kid looked very unusual...

He had only slight muscle on his body but held himself like he had seen and won many battles, yet at the moment folded gently with care as he examined Sirius's body. He had a skin-tight black jumpsuit on with white circling around his neck, around as a belt, white gloves and boots. He also had a Misty 'D' in the centre of his chest but with more examination, it also shows a smaller 'P' in the middle. He had fair skin with an easy jawline and streak white hair. As his eyes noticed Sirius's they locked almost having their own conversation. To Sirius though. Those green eyes meant more to him then this kid knew. Speaking of which...

"Oh, you're awake! Can you speak?" Sirius shook his head slightly. "Ah, okay um... Your really injured Sir, I need to take you o fues edabue..." His voice started fading as black swallowed his vision.

"Nru! Nru, fnerus fnus versu!" Sirius fainted.

Danny's POV

"Oh, you're awake! Can you speak?" I asked uncertainly. How did this guy get here and what was he wearing? The man nodded if only very slightly. "Ah, okay um... Your really injured Sir, I need to take you to the human realm." He started to close his eyes and slowed his breathing. He's dying...

"Sir! Sir, you have to stay awake!" I yelled. It didn't work he finally fainted. I grabbed his body bridle style and flew as fast as I could back to the Far Frozen to get help from Frostbite. He saved me when I was freezing and many times when I got really hurt, maybe he can help him. I looked down at my 'passenger' and into the stain of blood on my jumpsuit. I need to get there fast, he's losing more blood!

Just in time, the icy cold 'wasteland' named the Far Frozen came into view and I flew faster to get there in time. I landed gently, as to not shake the man too much and ran my way to the village. Frostbite was in the training area outside cleaning up some ice weapons as he noticed me.

"Oh, Great One, welcome back! What-" He cut off as he noticed the bloody man in my hands and ran to me to get him up. "What happened? Who is this man?" He asked me. We began making our way into the palace fast but not too fast so to not bump the guy and I began recalling what happened.

"As I was flying back home after our spar I spotted this man floating in the middle of the Zone so I called out but he didn't react so I went closer and noticed his condition. He was bearly awake but slowly losing consciousness so I flew him here as fast as possible. Can you help him?" I concluded as we entered the healing room. Frostbite placed the man on a bed and undid the buttons on his shirt. Checking how bad it was.

"I'm sure he will be alright, though I don't know how this happened." He confessed. A couple of yetis we passed on the way here came in and lay out some medical supplies. Frostbite got to work. "Great One, perhaps it is best if you stand outside." He suggested so I walked out of the room and shut the doors and waited.

No one's POV

After an hour of waiting in the waiting room, a loud boom came from inside followed by a scream. Instantly Danny slammed the doors open and ran to Frostbite who was on the floor. The good news was he wasn't hurt and their 'guest' was up. In fact, pointing a wand at Danny and Frostbite.

"What are you!" Sirius exclaimed. He began thinking he wasn't dead. Then again...

"We're ghosts! What are you doing pointing a stick at us and knocking Frostbite down when he was helping you!?" Danny Restored. The man looked the two over and lowered his wand.

"Oh uh... Your ghosts? That means I am dead. Oh, wait but you're tangible. " Sirius muttered.

"What are you talking about?" Danny asked, helping Frostbite up. "You're not dead just somehow ended up in the Ghost Zone or Infinite Realms as ghosts here call it, and I've always been tangible unless I turn intangible," Danny explained as he did so.

"Interesting... The ghosts I've come across are always tangible, what else can your type do?" He asked curiously.

"Haha, well Sir your type of ghost must be very powerless, about a level 1 or 2 while I am a level 5 and The Great One is an 8." Frostbite explained.

"Oh, I see..." He paused as he realised, "Wait, I'm alive! haha, I'm alive! But Harry! He's in danger! I got to get back! Can I get back?" He rambled to both of the ghost present in the room.

"Of course, The Great One can take you back to the human world and sort you out." Frostbite smiled.

"Uh... Yeah... Come on then, let's go." Danny replied. "See you later Frostbite and thank you for everything!"

"Oh yes, thank you from me too uh, Frostbite?" Sirius thanked unsure about the name but shrugged it off. Danny grabbed onto Sirius' arm and flew them through the Zone towards the Fenton ghost portal.

"So, whats your name?" Danny asked ending the silence.

"Sirius Black. And you?" Sirius asked cringing waiting for a reaction.

"You don't... Im Danny Phantom." Danny replied easily but confused at why this man didn't know him. "So, how did you end up here?" Danny asked.

"In the Ghost Zone, as you call it?" After a nod, he continued, "Well I was fighting with You-Know-Who's servants Lucius Malfoy and managed to disarm him and stop him hurting Harry Potter but my cousin Bellatrix hit me with a Avada kedavra and I fell through the Veil to here." Sirius avoided Danny's eyes until now but all there was, was a confused face.

"Uh... First whos You-Know-Who? Why did your cousin attack you? Whats the Veil? and Whats Avada Kedavra?" Danny rapid fired. Sirius blinked in shock.

"You don't know?" At that moment Danny realised wizards exist and what has been happening there. Sirius told the sad tale of what has happened to both him, Harry Potter and many others in this war.

"Wow... Thats, Im sorry." Danny couldn't find the words. He chuckled slightly making Sirius look at him questionably. "You said Harry is The-Boy-Who-Lived?"

"Yes. What about it?" Sirius asked.

"Well, I'm basically the opposite. Im The-Boy-Who-Died." At that, they laughed despite not knowing each other for more than an hour and continued on their flight. Danny ended up explaining what he was to the Wizard. A Halfa. While Sirius smiled at how he and Lupin would relate, both being half-breeds, fun and great company.

Soon Danny looked up from the wizard he just met laughing and noticed the coming Fenton Ghost Portal. "Well, we're here." They landed on the rock leading to the entrance and walked through.

"So where are we? In the world that is." Sirius asked.

"Amity Park, America." If Sirius had water in his mouth he would definitely do a spit take.

"A-" He took a breath and continued, "America... Thats um... Far away from Britain. I should have guessed because of your accent."

Danny also would have done a spit take, "Britain!" Sirius nodded. "Well, I did promise I would take you back home..." He sighed, "Come on let me tell my family where we're going."

They walked up the stairs and told Maddie and Jack where they were going and who Sirius was (Minus his secrete,) and began flying with a backpack to Britain. 20 minutes into the flight Sirius facepalmed and made Danny go to the ground.

"What? I think we should keep going." Danny pointed out.

"Well, I uh... Forgot to mention something..." Sirius revealed.

"What?"

"Wizards can apparate which is transportation like teleporting..." Danny facepalmed and cried out sulkily.

"You couldn't have said that earlier?" Sirius took his hand and apparated to 12 Grimmauld Place. "Nice place. Are we in Scottland?" Danny asked.

"No, actually we're in London. At my family's house."

"Well, I guess this is goodbye?" Danny stated awkwardly and darted his eyes. He grew attached to the strange wizard he met a few hours ago.

"I guess so... It was nice to meet you Danny and If I ever need you or want to visit I know where you are and same for you more or less." Sirius smiled at his new friend.

"Well uh, which ones your house? 11 or 13?" Danny asked pointing to the two doors. Thats right Sirius forgot about that.

"Oh uh, well it doesn't matter really..." He muttered then pulled Danny closer and whispered in his ear, "12 Grimmauld place," This made Danny confused.

"But there's only 11 and 13 here-" As he thought about it, 12 appeared in front of him as he gasped out of awe. "Wow."

Sirius chuckled and declared he will introduce him to Lupin one day he isn't classified as dead. To that, Danny laughed and waved goodbye as he began to fly up then it struck him...

"Uh... Sirius?"

"Yeah? Oh right..." He didn't tell him how to get home. Danny flew up high quickly spotted the main London city with the London Eye and all. he took a picture from above as a map to get to Sirius' house if he needs it and flew down. He waved off the confusion Sirius gave him and gave his hand.

They appeared at Fenton works and Danny waved silently until Sirius envaloped him in a hug and gave a smile. Embarrised he also nuggied him. They waved again as Sirius went home and Danny went into Fenton works. How was he going to explain to his parents he went to London and back in 30 minutes without magic? Blame it on a ghost.