Ganondorf would be an obvious choice. Since he is the main villain in Ocarina of Time, he could continue his reign of terror in the World of Light. He might even gain new powers or form alliances with other dark forces in this new world.
One idea could be Link from Ocarina of Time getting transported into the World of Light and having to learn new combat styles to fight the enemies there. He might meet characters from different Nintendo universes and form unexpected alliances.
I really like the fanfiction titled 'A New Era'. It explores how the different races in the Ocarina of Time world interact and change in the time after the main events. It has some interesting takes on how the magic and technology in the game might progress. The author also does a great job of writing dialogue that feels like it could be from the official game.
To write a great 'Naruto' and 'Ocarina of Time' fanfiction, you should also consider adding your own unique twists. Maybe there's a special power that comes from combining chakra and the magic of the Ocarina. Or perhaps there's a prophecy in both worlds that foretells the coming of the crossover. This will make your fanfiction stand out from others and attract more readers who are looking for something fresh and exciting in this crossover concept.
One idea could be to have Naruto find the Ocarina of Time in the Hidden Leaf Village. Maybe it was left there by a wandering traveler from the 'Ocarina of Time' world. Naruto, being curious, starts to play it and unknowingly opens a portal to the world of 'Ocarina of Time'. He then has to navigate this new world, using his ninja skills and making new friends and allies there.
Another approach is a magical transformation. In the fanfiction world, a powerful magic spell could be cast that turns the protagonist into Link. This could be part of a larger quest, where they need to be Link to save Hyrule from a new threat. For example, a dark sorcerer has cursed the land, and only by becoming Link can the hero access the power of the Ocarina and the Master Sword to defeat the evil.
The Triforce in Ocarina of Time is a powerful and important element. It is divided into three parts - Power, Wisdom, and Courage. Link is often associated with the Triforce of Courage. Ganondorf desires the complete Triforce for his own evil ambitions. Zelda holds the Triforce of Wisdom and she plays a crucial role in the story's events related to the Triforce, guiding Link and trying to prevent Ganondorf from getting all of it.
To start a self - insert Ocarina of Time fanfiction, first, really understand the world of Ocarina of Time. Replay the game if needed to get all the details of the settings, characters, and storylines. Then, think about your self - insert character. Decide on their appearance, personality, and backstory. For example, are they a Hylian with a special skill? Next, figure out how they will fit into the existing story. Will they be a new character that Link meets? Or will they have a role in the events that are already in the game? This is a great start for your fanfiction.
One unique feature is the in - depth exploration of characters. Fanfiction often delves deeper into Link's and Zelda's personalities, their fears, and hopes. For example, in some works, we get to see Link's internal struggle with his destiny more clearly. Another feature is the expansion of the lore. The fanfiction might introduce new elements to the story of the ocarina of time, like undiscovered magical properties of the ocarina. Also, it can offer different plot twists, such as a different villain's origin story related to the ocarina.
One interesting concept is alternative timelines. Fanfiction might explore what would happen if Link made different choices during his adventures. For example, if he didn't pull the Master Sword at a certain time. Another concept could be character backstories. Writers often expand on the pasts of characters like Zelda or Ganondorf, adding more depth to their motives. There are also fanfictions that focus on different relationships, like a deeper friendship between Link and Saria that wasn't fully explored in the game.