The plot is key. It could be an adventure story where they team up to face a new threat in their world. Or it could be a more emotional, character - driven plot about their friendship evolving into something more. Good fanfictions also have engaging writing styles that draw the reader in and make them care about what happens to the characters. This might include vivid descriptions of the settings and the characters' feelings.
One great Ness x Lucas fanfiction could be 'The Bond Beyond Worlds'. It beautifully explores their relationship in a post - adventure setting, with them sharing their unique experiences. Another is 'Ness and Lucas: A New Journey' which focuses on their journey together to discover a new mystery in their shared universe. And there's also 'Friendship to More' that gradually develops their friendship into a deeper emotional connection.
A common theme could be friendship. Since Ness and Lucas are both from the same game universe, their relationship can be explored in terms of a deepening friendship.
You can start by looking on popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions, and you can easily search for Ness x Lucas ones. Another option is FanFiction.net, though the interface might be a bit different, but it also has a good number of such fanfictions.
Perhaps a fanfic where Ness is on a journey to a new land and stumbles upon Lucas who is in trouble. Ness helps Lucas out and from there, they embark on a journey together. Along the way, they learn about each other's cultures and the unique aspects of their homes.
One common theme could be friendship. Given the nature of these characters, fanfics might explore how Ness, Lucas, Ninten, and Claus form deep bonds with each other. Another theme could be adventure, as they all come from a world full of strange creatures and phenomena in Earthbound. They might embark on new adventures together.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfics for various fandoms, including ones about Lucas and Ness. Another option is FanFiction.net. Just use their search function and type in 'Lucas x Ness' to see what's available.
Another plot point could be a misunderstanding between Ness and Lucas at first. Maybe they misjudge each other's intentions due to the differences in their upbringing and the worlds they come from. But as the story progresses, they clear up the misunderstanding and become friends. For example, Ness might think Lucas is too soft because he comes from a more rural world, while Lucas might think Ness is too brash from his urban - like world in Earthbound. As they face challenges together, they see each other's true selves.
One place to start looking for 'ness x lucas fanfic' could be on fanfiction.net. They have a large collection of fan - created stories, and you might be able to find some interesting ones there.
A possible plot could be that in the world of Earthbound, a new threat has emerged that is related to the pasts of Ness, Lucas, Ninten and Claus. The threat is causing disruptions in the fabric of their worlds. They are all brought to a central location, the Claus Camp. Here, they start to train together, learning about each other's powers and abilities. As they train, they uncover secrets about their families and the origins of their powers. They then set out on a quest to find the source of the threat. Along the way, they have to deal with internal conflicts, like Ness and Lucas having different approaches to problem - solving, and Ninten and Claus having trust issues. But through their adventures, they become a tight - knit group and are able to face the final showdown with the threat.
I'm not sure of specific fanfics for this combination off - hand. But you can try looking on fanfic websites like Archive of Our Own (AO3). They usually have a large collection of fan - created works, and you can search using the relevant tags like 'Earthbound', 'Ness', 'Lucas', 'Ninten', and 'Claus' to find what you're looking for.