One good Merida x Hiccup fanfiction is 'A New Alliance' which explores their journey together in a world where their kingdoms need to unite. It has great character development.
There's a fanfiction called 'Beyond the Borders'. In this, Merida and Hiccup meet by chance during a hunting trip gone wrong and end up relying on each other's skills. It's really interesting to see how they interact in a non - traditional setting.
You can find them on Archive of Our Own (AO3). It has a large collection of fanfictions, and you can easily search for Merida x Hiccup ones using the search bar.
A good 'Merida x Hiccup' fanfic should first have well - developed characters. Since we already know Merida and Hiccup from their respective movies, the fanfic should stay true to their personalities. For example, Merida's strong - willed nature and Hiccup's inquisitive mind. Second, an interesting plot is key. It could be something like them teaming up to solve a mystery or facing a new threat together. And finally, the relationship between them should develop in a believable way. They come from different worlds, so how they bridge that gap is important.
Romance is also a big theme. Writers love to explore how their relationship develops, from the initial meeting where they might be a bit wary of each other, to gradually falling in love as they discover each other's strengths and similarities. For example, they both have a strong sense of independence and a love for their respective homes.
There's a fanfic titled 'Across the Realms'. In this one, hiccup and merida are brought together by a magical force. It's really exciting as they have to overcome various challenges in a strange new land while also getting to know each other better. It has some really great character development for both of them.
One common theme is adventure. Since both Hiccup and Merida are adventurous characters, fanfics often put them in exciting situations like exploring new lands or facing mythical creatures.
One great 'Merida x Hiccup' fanfic is 'A Meeting of Two Worlds'. It beautifully weaves their different cultures together. The story has them meeting by chance in a magical forest and then going on an adventure to save both their kingdoms. It's full of action and also some sweet moments between them.
One great Toothless x Hiccup fanfiction is 'The Bond Beyond Wings'. It beautifully explores their relationship as they face new challenges in Berk. The author does a wonderful job of portraying their deep connection.
Maybe it turns out that Merida's magic has a connection to the dragons in Hiccup's world. When she first arrives in his land, she accidentally awakens an ancient and powerful dragon that was thought to be just a legend. This dragon is both a danger and a key to solving a bigger mystery that has been plaguing Hiccup's village. And Merida has to learn to control her new - found connection to the dragon with Hiccup's help.
You can try fanfiction websites like Archive of Our Own (AO3). There are often a great number of Hiccup x Merida fanfictions there. Just use the search function and type in 'Hiccup x Merida' to see a list of relevant stories.
One common theme could be adventure. Since both Hiccup and Merida are known for their adventurous spirits in their respective movies. They might go on quests together in the fanfiction.