I'm not sure of a specific one off the top of my head, but you can start by looking on popular fanfiction websites. Search for tags like 'Fairy Tail', 'Naruto', and 'watch' to narrow down the results.
Well, one could be a story where a character from Fairy Tail stumbles upon a magical watch that has the power to transport them to the Naruto universe. Maybe they use it to learn new ninja techniques and bring them back to their own world to help in battles against dark guilds.
Fanfiction about 'Fairy Tail' watching the past could involve the characters using some sort of magic or device to view their own past events or the history of their guild. It might show how they react to seeing their former selves, old relationships, and past mistakes.
Abridged fanfiction often takes the essence of the original story and condenses it. In the case of 'fairy tail watches abridged fanfiction', it might involve the Fairy Tail characters witnessing a more concise form of the fan - made stories. Maybe it's a way for the author to explore different scenarios and how the characters would respond, like how Natsu might react to a new take on his relationship with Lucy in the abridged fanfiction.
One key element is the contrast between the two worlds. Edolas has its own unique magic and society, and seeing how the characters from there react to Fairy Tail's more chaotic and emotional world is really interesting.
One interesting story could be about a new character who joins the Fairy Tail guild and has a unique watch that holds a special magic. This watch might help the character in battles or in solving mysteries within the guild.
It could also be about the Fairy Tail guild making decisions based on the future they see. They might change their current actions to avoid a bad future or strive to achieve a better one. They could start forming alliances with other guilds earlier than they would have otherwise, in order to face a common future enemy more effectively.
In that fanfiction, it might be designed that way. Naruto has incredible powers in his own series, like his various jutsu. If translated into the Fairy Tail world in fanfiction, his skills could potentially make him very powerful. But it also depends on how the author of the fanfiction interprets and balances the power systems of both universes.
The Sharingan in such a fanfiction could be used as a tool for a Fairy Tail character to gain an edge in their battles. They might initially struggle to control it, but as they learn more about it, they become a formidable force. For instance, they could use the Sharingan's genjutsu abilities to deceive opponents in the Fairy Tail battles.
In the Fairy Tail world, Naruto would bring his unique ninja abilities. For example, his shadow clone jutsu could be used in creative ways during battles or to perform tasks. He would likely befriend Natsu because they both have a passion for fighting and protecting their friends. Naruto could also introduce new combat styles to the Fairy Tail guild, which might change the way they approach battles.