Hello and welcome to my new story: Harry Potter and the Five Dragon Warriors! The idea for this story has been in my head for many months now and I finally decided one day to just write it for the fun of it. It is a crossover between Harry Potter and Keroro Gunso. The story starts off with Harry in his 6th year at Hogwarts and the 4th movie of Keroro gunso. If you haven't seen the 4th Keroro Gunso movie I strongly advise that you do because the majority of this story is based off of it. This is my first time writing a crossover fiction so I hope that I do a good job with it. Anyways, special thanks to my awesome Beta reader: Lorze the Brookes, for helping me get this story started. Enjoy!

Prologue

Harry ran as quickly as he could down the empty hallways, a rolled up newspaper clenched tightly in his left fist. His determined pace was hindered only by a few professors who he had passed in the halls, apologizing and making false promises that he would stop running. Panting, he finally came to a stop in front of his destination: a large stone gargoyle. He quickly muttered the password, causing the gargoyle to jump to the side. He stepped quickly onto the ascending spiral staircase, and waited impatiently as it made its painfully slow trek to the top. Suddenly remembering the reason for his haste in the first place, Harry glanced down at the newspaper he was holding, thinking back to a few minutes ago at breakfast…

It had started out as another typical day. Harry had woken up the same as he had for the past few weeks; feeling restless, and worried about the task that Dumbledore had asked him to do. Throughout the school year, he and Dumbledore have been having private meetings in the professor's office, looking at memories associated with the dark wizard Voldemort; trying to find the key to defeating him once and for all. All of the work they had done, however, depended on one last memory, which belonged to the new potions master, Professor Slughorn. But Slughorn was obviously ashamed - even afraid - of the memory, and refused to give it up, no matter how many times Harry tried asking.

On top of this, lately it had been a lot harder for Harry to stay focused, because of all the strange things that had started happening around the world. For about a month, now, there have been these giant blue "dragon tail" like arches appearing in five different areas around the world. The places they appeared at were Australia, North America, Africa, France, and Japan. Nobody in the wizarding world knew what has caused them, or, worst of all, how to get rid of them. Harry had gone to Dumbledore when they had first appeared, to ask if it was something that Voldemort was doing, but Dumbledore had assured him that it had nothing to do with the Dark Lord. This hadn't been enough to convince Harry, however, and he made a point of keeping close track of the arches through the reports in the Prophet, just in case.

Now, it had been nearly a month, and there were still no new developments on the arches. When Harry went down for breakfast that morning, the owl post arrived just as he reached his seat. He got his newspaper, paying the owl who delivered it, and was just taking a sip of his Pumpkin juice, when he glanced at the front page and nearly spat it back out in shock, his eyes going wide.

"Look!" he said to his two closest friends, Ron and Hermione, as he pointed to the front page. They both crowded around him to get a look and, after reading the first few lines, both their eyes went just as wide as his did. Harry quickly got up from the table, and started heading out of the Great Hall.

"Harry, where are you going?" Hermione called after him.

"I'll be right back," he yelled over his shoulder as he passed through the doors. Harry had noticed that Dumbledore hadn't come down for breakfast (which hadn't been unusual lately), and decided that he would be the best person to get answers from about the recent news.

When the spiral staircase finally made it to the top, Harry walked quickly to the Headmaster's office door, but then hesitated a little when he reached it. Instead of just barging in, he knocked loudly on the door, and waited for the "Come in" before he entered. Dumbledore was standing next to the window, with his back to Harry. As Harry walked in, he turned around and gave him one of his knowing smiles.

"What can I help you with, Harry?" he asked, calmly.

"I wanted to ask you about this..." said Harry as he unrolled the newspaper and showed Dumbledore the headline, which clearly read: "Strange Dragons Appearing Around the World!", accompanied by an article that explained how four different colored dragons had appeared at four of the areas where the arches were.

Dumbledore's smile grew as he said, "Ah, yes, the dragons. The Daily Prophet may print a lot of falsities, but you have to admire their speed."

Harry said nothing as he waited for the professor to continue.

"Like you, Harry, I have also been keeping myself informed on the goings on of the arches. Of course, I have a much more reliable source than the reports of the wizardly journalists."

Harry was just about to ask what that source was, but Dumbledore cut him off before he had the chance. "I'm afraid that the whole thing remains as much a mystery to me now as it did when the arches first appeared. I have never heard of such a thing happening before, and found nothing when I did a bit of research on it. But, I do know that Voldemort is not involved in any part of it. In fact, he appears to be angered by it, and is currently searching for the person responsible."

"Oh." said Harry, disappointed. "But what about the four dragons that appeared in France, Australia, Africa, and the United States? What's going to happen if they start attacking people?"

"I don't know, but I somehow sense that the appearance of the four dragons marks the beginning of the solution as to why the arches even appeared," Dumbledore said thoughtfully, tapping his chin with his forefinger. His brow wrinkled slightly as he continued to voice his thoughts aloud. "But I do find it rather odd that a fifth dragon didn't appear in Japan, like in the other four locations." He shrugged "Alas, I suppose that some mysteries in this world will just have to go unanswered. Don't you agree, Harry?"

"I - I guess so…" answered Harry, getting the feeling that Dumbledore knew more then he was letting on.

"Now, why don't you head back down to the Great Hall before breakfast ends, hmm? Students should always have a good breakfast before they begin their lessons," said Dumbledore, cheerfully.

"But -!"

"Now, now, Harry. You shouldn't fret about things that are beyond our control," interrupted Dumbledore, cutting him off. "And if memory serves me correctly, I believe that I gave you a task to do," he said, raising an eyebrow inquisitively.

Harry's face flushed with embarrassment. He had almost forgotten about that…

"Hurry along, now. Breakfast will be over shortly," said Dumbledore as he gently pushed Harry out the door.

As Harry went back down the spiral staircase, he couldn't help but feel a little disappointed that he didn't get the answers he was seeking. But, perhaps if he told Ron and Hermione about what was going on, they might be able to come up with some sort of explanation... Well, Hermione might, at any rate.

Over the next 24 hours, the whole world was put into a state of disarray as strange things began to happen. In the picturesque English countryside where Harry was, the day had started out warm and sunny, but around noon, the weather became suddenly cold, and snow even started to fall. Winds stopped blowing all over the world, and the oceans froze over as though time itself had stopped. There were no more tides and no more waves. The whole planet slowed down as if the life was being sucked out of it. But then, as quickly as it happened, it vanished. Everything went back to normal, as if nothing had ever happened.

When Harry went down to breakfast the next morning, he was itching to get his hands on the morning newspaper. When the owl post got there, Harry paid the owl and quickly unrolled the paper, Ron and Hermione stood next to him, as he read aloud what had happened.

"It turns out," said Harry, looking up from the newspaper at his friends, "Dumbledore was right about there being a fifth dragon, except that it didn't appear in Japan. Look! For some reason, in the night, the four other dragons came together in France, over a historical building called Mont Saint Michelle. After meeting, the four dragons immediately started fighting each other. Then while they were fighting, the fifth dragon appeared out of nowhere and defeated then all in one go!" said Harry, his eyes widening slightly.

"Wow, four against one? That one must have been really strong," said Ron, impressed.

"Shush! C'mon, Harry, what happened next?" asked Hermione, excitedly. Harry looked back down at the paper, his eyes scanning the text.

"It then goes on to say that a much larger dragon than the other five came out of the ground from below Mont Saint Michelle. It doesn't give much more detail other than there was a huge flash of light shortly after its appearance, and then it and the other five disappeared without a trace. The arches also disappeared from their places around the world and the planet instantly went back to normal."

"How can creatures that big just disappear? It doesn't make any sense!" exclaimed Ron.

"I don't know, but it's over now. I think we have bigger things to worry about., like how Harry is going to get that memory from Slughorn," said Hermione.

"Yeah, you're right," sighed Ron, dejectedly. "But, still, those were pretty strange looking dragons. I mean, I'm not an expert or anything, but I've learned enough about dragons from my brother Charlie to know that those ones weren't natural." He said, taking a glance at the pictures that were taken of the five dragons.

Harry also looked back down at the pictures, examining the dragons more closely. The first picture was of the one that first appeared in France. It was different to the other four, in that this one had a long, thin body and only two legs, both at the front. It was black, except for its white underbelly and face. It had a hard, yellow, hat-like covering at the top of its head, that had what looked like a thick yellow mane of hair coming out from the back of it. At the front of the hat was a small yellow and green symbol, which was shaped like the feather end of an arrow. One half of it was yellow and the other half was green.

The second picture was of the one that appeared in the United States. Unlike the black dragon, this one had two front legs and two back legs. It was red in color except for its belly, chest, neck and jaw which were white. Also unlike the black dragon, this one had thick, strong looking wings that looked a little torn up, as if from a fight. It had two black belts criss-crossing its chest, and what looked like some kind of missile launcher attached to its right wrist. An old-looking scar ran down its left eye and down to its chin, and towards the back of its head were two short horns. It had the same kind of hat on the top of its head as the black dragon, except that this hat was dark red. It also had a symbol, but this one was of a yellow human skull.

The third picture was of the dragon that appeared in Africa. Its body structure was the same as the red one's, though this one was a little thinner. It was blue except for the belly, chest, and neck which were also white. Its jaw couldn't be seen because a light grey mask was covering the lower half of its face. On its belly and chest was a large, yellow, four-pointed star, which was also seen as the symbol on the hat at the top of its head. The horns on its head were longer and pointier than the red one's and its wings were also a bit larger. The most noticeable feature of this dragon, though, was the long, deadly-looking sword that was clutched within its two front claws, and a scabbard to go with it, attached to its hip.

The forth picture was of the dragon that appeared in Australia. The way its body was colored was just like red and blue's, except that this one was yellow. Also like the two that came before it, it had four limbs. Its wings were thin and pointy, and instead of having two horns, it had one rounded one. Its wings were slightly differently colored than the other two, whose wings were a solid color; this one's wings were yellow on the outside and dark blue on the inside. On its chest and belly was a red swirl, with its end coming down and ending at a point. It didn't have a hat like the other three, but the top of its head was orange, and it had a yellow, snail-shell-shaped symbol on it. On the sides of its head, where the ears should be, were two large, round, black headphone-like disks that each had two long wires coming out of them.

The last picture was of the fifth dragon. Its body structure and coloring were the same as the three before it but its coloring was green. It had a large, yellow, five pointed star covering its belly and chest. It had two long horns and wings like the blue dragon's except that the horns weren't as pointy and the wings were a little shorter. Its hat was yellow and the red symbol on it was also a five pointed star. This dragon didn't have any special features that stood out like the other four but it did have something that Harry noticed the other four did not have. The look that it had in its eyes. Its eyes had a hardened, dangerous look in them that gave Harry a slight shiver down his spine. He knew, just by looking at them, that this dragon would have had no problem defeating the other four many times over without even breaking a sweat.

"Well, we better start heading to class," said Hermione, cutting through Harry's train of thought.

"Alright," said Harry, as he stood up from the table while stuffing the newspaper into his bag, and, with it, his thoughts on the strange events over the past month. Now that it was over, he needed to keep himself focused on the important task that Dumbledore had trusted him with.

Just so you readers know, I have several chapters already written so you should expect another update within a week or so.