There might be a fanfiction where Merida and MacGuffin team up to save their kingdom from an unknown threat. They could use their individual skills - Merida's archery and MacGuffin's charm - to defeat the enemy. For example, MacGuffin could charm the enemy's spies while Merida takes them out from a distance with her arrows.
You can try looking on popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions from various fandoms, so there's a good chance you'll find some Merida x MacGuffin stories there.
I'm not sure of specific 'brave merida and young macguffin fanfiction' stories off the top of my head. But you can try searching on fanfiction websites like Archive of Our Own. There might be some great works there created by fans who are really into this pairing.
One common theme could be adventure. Since both Merida and Macguffin are from a world full of action and challenges, fanfictions might revolve around their joint adventures.
One possible good fergus x merida lemon fanfiction could be one where they go on a secret adventure together in the forest. They discover a hidden glen and in that moment of shared discovery, their relationship deepens. It might be filled with tender moments and a bit of mystery.
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.
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.
A frequently used trope is 'Injury/Healing'. For example, the reader could get injured and Male Merida takes care of them, which deepens their bond. Also, the 'Fish Out of Water' trope can be seen, like if the reader is from a different world or culture and Male Merida helps them adapt. This creates interesting situations and character dynamics. There's also the 'Love Triangle' trope sometimes, where another character might be vying for the reader's or Male Merida's affection, adding some drama to the story.
One interesting Merida and Rapunzel fanfiction could be about them teaming up for a magical adventure. Maybe they discover a new enchanted forest together and have to use their unique skills. Merida's archery and fearless nature combined with Rapunzel's long hair and its magical properties would make for an exciting story.
One interesting story could be where Naruto and Merida meet in a magical forest. Naruto's ninja skills and Merida's archery skills combine to fight a common enemy, like an evil sorcerer who is trying to take over both their worlds. They start off as strangers but quickly learn to respect and rely on each other's abilities.
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.