Thanks for all the Interest in my insanity ^^ I hope you will like this Chapter and excuse the long wait. I am truly sorry but I have some shit going on at home and I hope you will Understand.
Okay here is the Chapter ^^ have fun.

Hogwarts; Great Hall

Dumbledore walked after Harry (I will change what I call him depending on the form he is in) through the Door. Everyone in the room looked up when they heard the Door. The Headmaster looked through the room but he couldn´t find Harry.
"Has someone entered before me?" Everyone could see the confusion on his Face when he asked the question.

Madame Maxime was the one who answered
"No. You are the first Person to enter since young Mr. Diggory. But we heard some sort of commotion in the Great Hall. Had that something to do with the Forth Champion you wanted to add?"

Before Dumbledore could answer her, all Lights in the room went out.
Everyone gasped but fell silent when a drumroll started and a Light shone down from the Ceiling on an empty stage.

A disembodied voice was heard by everyone

"Tonight, in Hogwarts at the meeting of the Champions, meet the forth unwilling Champion, Master of Chaos, the handsome, the talented, the extraordinary DISCORD alias HARRY POTTER!"

Confetti exploded left and right, an audience appeared before the stage throwing roses and money on the stage. On the stage with a bright flash Harry appeared wearing a Suit so yellow, everyone had to squint their eyes to block out the reflecting light. Harry opened his eyes and they were a beautiful shade of emerald with a red ring of molten Magma around the pupil.

He smirked , everybody could see the longer Canine, jumped from the stage with a summersault mid-air and landed with a Pirouette. The room returned to normal with a small puff and inside the large smoke cloud stood a small purple Dragon who looked slightly confused.

"You have the great honour to compete against the magnificent Master of Chaos. I know of course who the other Champions are." He glanced at the other People in the room "and you must be the other Headmaster and the Headmistress." He bowed slightly and said with a smirk on his face "Nice to meet you, I am Harry Potter but I prefer the name Discord."

Silence. The room was silent for 10 seconds before Ludo Bagman walked forward and shook his hand.

"It is…. nice?" he looked at the other people in the room for help "that you could make it to our…" he trailed off when he saw the pure furry in Harrys eyes. He gulped and asked in a small voice "is everything alright? Did Dumbledore not explain to you that his plan to bring you back was to enter you into the Tournament?"

He missed the stop talking gesture Dumbledore made behind Harrys back.
Harry just turned around and looked into Dumbledore's eyes.

"No. He failed to inform me about that. Well, I will have to…`talk` with him about that later." Everyone noticed how Dumbledore flinched away from Harry but they did not dare to question it.

"Okay let us start now with the Announcement" Mr. Crouches voice cut in.

Great Hall, 5 seconds after Harry went into the Room

Hermione was trying to sort her emotions. She was Happy that Harry was back, confused at what happened to him and Angry at Dumbledore for his Plan. He had announced at the Beginning of the Year feast that he would use the Goblet of Fire to bring Harry Potter, their saviour back Home where he belongs. She and Neville had scoffed at that and even Draco, who was a lot nicer since his Father was in Prison for being Responsible for the Opening of the Chamber of Secrets, had to admit that this would be a bad Idea.
Luna just seemed happy because she never got the chance to meet Harry and she wanted at least to get to know him.

She looked up when she saw a light flash in the corner of her eye, only to come eye to eye with a second Harry Potter staring her in the Face. She jumped back in shock before she noticed what she was doing and composed herself quickly.

"that was not nice Harry" she glared at him for a second before she took him into a Death Grip Hug and started crying.

Harry just stood there slightly unsure what to do before he patted her on the back and whispered soothing words into her ear.
He looked up and saw Neville and Luna sitting nearby (Luna has no friends in her House so she sits with Hermione and Neville at the Gryffindor Table).

"How are you Neville?" Harry casually asked.
"Good. And as I can see you are good yourself." He gestured to Luna
"this is Luna Lovegood. She is a third year and she helped me save Hermione in our second year. By the way, I understand now why you wanted to be Normal. All the Danger in this school seems to find me since you disappeared. I am not Happy" Neville smiled when Harry Laughed. Everyone else notice him sitting at the Table.
Luna asked the question that everyone had. "How are you here when you went into the room with the other champions? Are you at 2 places at once?" that brought a smile on Hermione's face.
"Well you see…." A second Harry appeared next to the one Hermione was still Hugging, handed him a Glass with a brown liquid and disappeared "I am everywhere and Nowhere*1"

Luna seemed to accept it but before anyone could say anything Harry stretched, picked Hermione up as if she weights nothing, placed her on a floating chair that appeared out of nowhere and said, while standing up "Well, the champion announcement is finished and I will come out of the room in a few seconds. So Tarra" with a smile, he jumped and mid-air turned into a Butterfly that flew out of the window.

Everyone's eyes were fixed on the window. Nobody had a plan what just happened. Did Harry just turn into an Insect? Did he just Troll everyone because his laughter was still heard? These and more questions were never answered as the door opened and the Champions walked out.

They could hear the discussion between Dumbledore and Harry
"-and I will say it again, I am far too old to be a student, so I will not be Bunking with other students. Ether you give me a room or I will bring my own"

Before Dumbledore could even think that statement through, Professor McGonagall (who stopped trying to understand Harrys powers after 5 minutes for her own safety) said " I guess since the Headmaster is currently shut down trying to understand you, I will give you and Mr. Spike a Room for your own. Do we need to get extra Nutrition for Mr. Spike or is he a Carnivore like normal Dragons?"

"Well…he is more of an Omnivore but what he definitely need is Crystals."
"What do you mean? Does he eat Diamonds?"
"Yes, he can eat everything with a Crystalline Structure" he conjured a blood red Crystal and threw it at spike. Spike just jumped, caught it, sniffed it shrugged and bit a piece of the Ruby with a defining CRUNCH.
McGonagall just shrugged it off and gestured with her Hand to follow him. At the Doors to the Great Hall, Harry turned around. "Oh, before I forget a few things I have to say" he shifted back into Discord mode "First off, it has been nearly 4000 years since I was here, so I don't remember all of your Names.
Second, if anyone Harms me or my Friends, I will kill-" a shocked gasp came from spike, with an eyeroll Discord continued "fine, they will be …. DISCIPLINED by me. If anyone wants to know what that is like, ask Dumbledore" Every eye turned to Dumbledore who visibly stiffened.
"And third, my Friend from the other Dimension will be coming to visit for the Tournament. They are not Human and if ANYONE speaks degrading or bad about them…." He let that statement empty. With that, he saluted, flew a few feet into the air and followed McGonagall.

On their way to the Room, McGonagall made small talk with both Discord and Spike. She learned that Spike was the Assistant and little Brother of a Princess,
Discord got turned into stone for Ruling the World ("The second time was free for 2 days") and freed and reformed.

They were in the middle of the story about the Grand Galloping Gala when they reached the Painting. It was on the 5th Floor, where most Teacher offices were. It was behind a Painting of a Galaxy, that was sluggishly turning and twisting inside of the Picture. The password was Chosen by Discord and had both McGonagall and Spike trying not to laugh. The Password he chose was Harry.
He only gave an explanation that sounded like `Fluttershy´s Bear`.
After thanking McGonagall, Spike went into the Room. She wanted to say Good Night but was stopped by Discord.

"I wanted to thank you"
"For What?"
With a small smile Discord answered "You have accepted us here without throwing a tantrum or even siding with Dumbledore and for that I will give you this"

A Book poofed into existence right before her Face. It descended slowly into her Hands. She Turned the Book to look at the Cover and gasped. She wanted to thank Discord but he was already in his Room. She went into her office and laid the Book onto her Desk. In Bright Golden Letters on the Black Cover Stood
"The Art of Transfiguration: A tour Gide through Different Dimensions"

Under the Title was a Picture of a moving Discord, who was currently sleeping.

She read through the night and learned that Transfiguration from other Universes was Hard to Learn.

*1: Hellsing Ultimate, Schrödinger Reference

Next Morning, Great Hall

Every student that entered the Great Hall this fine morning froze in the entrance, stared up, shrugged and went to their tables. The Reason why they stopped you might ask. Well…..

In that moment, Hagrid entered, stopped, went back out and came back again.
He rubbed his Hands over his eyes but the weird image he was seeing didn't disappear.
5 meters in the air above ground, without support was a Table. What was so weird about a floating table you might ask? Well for starters it floated upside down second, 4 people sat at that table and only 1 looked Human. Harry had changed back and was playing chess with spike, a teacup and a Muffin in hand. The weird part except the upside-down thing? He was drinking the Muffin and the Teacup was missing pieces, so he must have eaten them. The next two occupants were interesting because no one had seen them the night before.
The first one that sat next to spike (who was munching on a large Kristal) seemed to bee some kind of bug pony. It had a black exoskeleton, green eyes and wings that looked more like Dragonfly wings than Pegasus or Thestral wings.

The next occupant was even more Puzzling because he seemed to be Toaster with eyes. The electrical cord swished back and forth like a tail, the eyes were on the small side and had Golden irises. It made weird noises that sounded more like a mouse than anything else.

Hagrid shook himself and tried to ignore the weird Picture.

When Dumbledore entered the Hall the first thing he did, was taking out his wand and trying to land the Table. To the surprise of everyone the Table Landed, made a flip, reared like a Horse and ran out of the Hall with a jump over the Headmaster.

Blink.

"What….what happened?"

"Well dear headmaster" answered Discord "I would say you ruined mine and Spikes game of chess" Still upside down but now in Discord mode, he let go of the cup and muffin and both grew wings and flew out of the window. He snapped his fingers and he, spike and the Toaster were sitting at the head table right next to Hagrid. The Changeling was nowhere to be seen.

The Headmaster just sighted and said in a defeated tone "I would like to know where this Toaster comes from and why it seems to be alive"

"Well you see, he is my pet and all alone in my Pocket Dimension. So, I decided to bring Charles here. As you can see, I gave him a little Moustache and a Top hat" Every eye turned on the little silver Toaster and he really had a small brown moustache and a Black Top hat on.

Everyone just returned to the Breakfast in front of them. 10 Minutes later Discord smirked and turned to Hagrid
"Hey Hagrid?"
"Yes ´arry?" Discord blinked and looked down. He had switched back to Harry without noticing.
"I see you have a cupcake there"
"Well yea´. The ´ogwards elves make the best"
Harrys Grin widened as he said "Well I could give you the best cupcake in the entire Multiverse if you want"
"Sure why not?" a snap later and before Hagrid sat a small cupcake with Rainbow frosting. Spike raised a scaly eyebrow when he noticed that that was one of Pinkies Cupcakes. Hagrid made a bite and slowly chewed. Every was on him as he slowly ate his Cupcake. His eyes grew wider with each second.
"Blimey. That is the best I have ever eaten"
Suddenly, a new voice spoke from the entrance of the great hall
"I see you like my Cooking"

AAAAAAND Cliff-hanger. I hope you had fun with this chapter and sry that i could not update sooner.