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.
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.
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.
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 idea could be a story where Ness, Lucas, Ninten and Claus are all brought together by a strange psychic phenomenon. They have to team up to figure out what's causing it and how to stop it. Along the way, they share their different experiences from their respective adventures and learn from each other.
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.
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.
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.
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 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.