The ancient ruin could be the key to understanding the origin of the ninja world. Naruto might find carvings or inscriptions that tell the story of how the first ninjas came to be. This knowledge could change the way the ninja villages view their history and their place in the world. It could also lead to new alliances or rivalries among the different villages as they all try to claim a part of this ancient heritage.
He might discover long - lost jutsu. Ancient ruins could hold scrolls with forgotten techniques that Naruto could learn and use to become even stronger in his ninja journey.
Well, he could encounter new allies and enemies in different villages and face all kinds of challenges on his own journey.
He may find rare ninja tools. These could be weapons or items with special abilities that no one has seen in centuries. For example, a sword that can cut through any defense or a tool that can enhance one's chakra.
He might encounter unique and dangerous beasts in Uzushiogakure. Fanfiction often has new and exciting creatures for the protagonist to face, and Uzushiogakure's different environment could be home to such beasts.
Well, they could be on a quest to find a lost artifact that holds the key to restoring balance in the futuristic society. Or they might get caught up in a power struggle between different factions and have to use their wits and the dog's unique abilities to survive.
Lots of exciting things could happen. They might encounter other clones and form a community. Or they could get involved in a battle to protect the dog from evil forces in the futuristic landscape.
In this kind of fanfiction, Percy Jackson would bring his unique demigod skills to the army. Maybe he'd use his water - controlling abilities to help in situations like creating water barriers or putting out unexpected fires. His combat skills, honed from fighting monsters, would make him a formidable soldier. He could also use his ability to sense danger to warn his comrades of impending threats.
Ash could meet new friends. The city is filled with different kinds of people. Maybe he'll meet a trainer with a completely different approach to Pokémon battles, which could inspire him to improve his own skills. He might also meet locals who can show him around and introduce him to the hidden gems of Altomare.
He'll probably meet a lot of new friends who also love Pokémon. They might share different training techniques and tips with each other.
He might face the challenges of the Marauder's Map all over again. Since he already knows about it, he could use it in new and unexpected ways to outwit his enemies or just to have some fun exploring Hogwarts secrets.
He might encounter rare Pokémon that are unique to the Johto region, like Chikorita or Cyndaquil as his starter. He could also face off against the infamous Team Rocket, who always seem to be up to no good in the Pokémon world.