A/N: Well, this is my first ever crossover fic! As a disclaimer, I own not the Kingdom Hearts series. Sadly, I also have no ownership of Legend of Zelda...
Here is the table of fonts to be used. It'll be updated as I see fit.
Table of Fonts:
Standard Text: Regular Dialogue/Storytelling
Italics: Emphasis, Sound Effects, thoughts
Bold: Navi's annoyingness, Boss Name
Bold Underline: Special Attacks (this is cried out)
Bold Italic: Deity speech
Underline: Flashback/History, name of location
Italic Underline: Dream
BOLD CAPS: Dungeon name
Prologue: A Fairy for Link! The Start of a Grand Journey!
Kokiri Forest, Hyrule
Link stared ahead at the walls of Hyrule Castle Town. The sky above was black from rain clouds, the rain falling down and turning the beautiful field into an ominous witness to the events unfolding. The bridge lowered, and out raced a horse, carrying a woman and a girl. The girl looked at Link, her eyes full of fear as the horse passed him up.
"ZELDAAAA!" Link cried out. Following behind them was a dark man riding on a black horse. He reared the horse when he reached Link. His left hand raised up, then he pointed it at Link.
Before anything else could happen, Link woke up, drenched in cold sweat.
"Phew. Just another nightmare," Link said, sitting upright. He decided to get up, especially when he heard a voice calling out his name.
"Yoo-hoo! Link! Are you awake up there?" Link stepped out and saw his best friend, Saria.
"Navi... Navi, where art thou? Come hither..." A wizened voice called out. A small fairy flew up to the tree that spoke the words.
"Oh, Navi the fairy... Listen to my words, the words of the Deku Tree... Dost thou sense it? The climate of evil descending upon this realm... Malevolent forces even now are even now readying themselves for an attack on the land of Hyrule... For so long, the Kokiri Forest, the source of all life in Hyrule, has stood as a barrier, keeping evil from wreaking havoc on Hyurle... But...before this tremendous evil power, even my power is as nothing. It seems the time has come for the boy without a fairy to begin his journey... The youth whose destiny it is to lead Hyrule to the path of justice and truth... Navi...go now! Find our young friend and guide him to me... I do not have much time left. Fly, Navi, fly! The fate of the forest, nay, the world, depends upon thee!"
The fairy nodded in understanding before flying off toward the Kokiri Village.
~~Back at Kokiri Village~~
Link decided to forego the ladder, and jumped down to where Saria stood, landing neatly. He got up.
"Hey, Saria! What's going on?" he asked her.
"You show-off! You're gonna get yourself killed one of these days!" the green-haired Kokiri huffed, but her expression quickly softened to a smile. Just then, Navi flew by and ran into Link's head. The fairy had been traveling so fast, she managed to knock the Kokiri boy to the ground.
"Ooops… sorry! Hey! Are you okay?" she asked, flying down to Link's level. Link didn't give the fairy a reply, opting to pick himself up off of the ground, grumbling while dusting himself off. Navi could distinctly hear something about "stupid fairies" and "watch where they're flyin'", and "like they own the place". She decided that her news was much more important. "Hey! Listen! The Great Deku Tree wants to see you!" she told Link. Saria gasped in surprise.
"Wow, Link! Not only do you finally get a fairy, but you even get to go see the Great Deku Tree!" she said. "You'd better hurry! I'll see you at the shop later! Don't be late!" she called out, taking off toward her house. Link looked over at Navi.
"Guess we'd better not keep the Great Deku Tree waiting, eh?" he said. Navi flew in front of Link as he walked, leading him to the Great Deku Tree. However, there was one obstacle… Mido.
"Hey, Mr. No Fairy! Where do you think you're going?" Mido challenged. He started to say more, but stopped when he saw Link's fairy. "What?! You've got a fairy?!" Mido asked in surprise. Link nodded.
"Yeah, now I need to go see the Great Deku Tree... he summoned me, so move out of my way, Mido!" Link replied.
"Say what? The Great Deku Tree actually summoned you? Whaaaaaaat?! Why would he summon you and not the great Mido? This isn't funny..." he said, the last comment being made because a couple of the Kokiri passing by were laughing at Mido's reaction. However, Mido looked closer and saw that Link had no sword or shield. "I don't believe it! You aren't even fully equipped yet! How do you think you're going to help the Great Deku Tree without both a sword and shield ready?" he asked Link. Link grew angry. Who did Mido think he was? Link decided to give Mido a piece of his own medicine.
"Well, you don't have any equipment either." Link pointed out with a slightly smug tone. "What? Did the 'Great' Mido finally slip up?" Mido stared at him in surprise, as he'd never seen Link talk back to him.
"What? You're right. I don't have my equipment ready, but... If you want you pass through here, you should at least equip a sword and shield! Sheesh!"
Link walked away, grumbling. He quickly ran through the grass, picking up Rupees. He walked over to the store, where he knew they sold shields. There, Link saw some rocks in front of the store. He decided to help, and was rewarded by the shopkeeper 20 Rupees and a discount coupon. Link stepped inside, and used the coupon to buy a Deku Shield. He then went to the Forest Training Grounds, and crawled into the hole there…
Notes on the Chapter:
1. Yes, I did copy pasta the script from the game. No, I do not feel cheap for doing so. No, it's not gonna be changed.
2. Navi is going to be in here! Yes, she will be annoying. No, she will not have a change in personality. However, she's confined to the OoT parts of the story.
UPDATE [1/29/2016] Edited the chapter to more fit my current writing style.