Sei Iori is also a top choice. His passion for building Gundam models and his growth as a builder and fighter throughout the series gives a lot of material for fanfiction. Writers can put him in different challenging situations to test his skills.
Perhaps a story where a builder discovers a hidden ability in a common Gundam model during a build. This new ability then changes the way battles are fought in the Gundam Build Fighters tournaments.
One interesting crossover could be the ninja skills of Naruto characters being applied in the Gundam Build Fighters battles. For example, Naruto's ability to clone himself could be used in a strategic way in a Gundam fight. Maybe a Naruto character could use their chakra to enhance the performance of a Gundam. Another aspect could be the sharing of values. Both Naruto and Gundam Build Fighters often deal with themes like friendship and determination. So, characters from both universes could bond over these shared values and fight together against common enemies.
One interesting concept could be the combination of different Gundam universes' technologies. For example, seeing the mechanics from the original Gundam series combined with those from Gundam Wing. It creates unique and powerful mobile suits that haven't been seen before in the official lore.
Char Aznable, even though he's from the original Gundam series, is a very popular character in these crossovers. His complex personality and his iconic status make him a character that fans love to see interact with the Build Fighters characters. Whether he's an ally or an adversary, he always brings a lot of drama to the story.
One good crossover could be where Naruto characters learn about the Gundam Build Fighters concept. For example, Naruto himself might be intrigued by the idea of building and piloting Gundams. He could use his chakra in unique ways to enhance the Gundam's performance. Another aspect could be Sakura using her medical skills to assist in the repair and maintenance of the Gundams. And Sasuke might be interested in the strategic aspects of Gundam battles and adapt some of his ninja fighting strategies to Gundam combat.
In fanfiction, the merge could happen because of a powerful jutsu gone wrong. This jutsu could distort space - time and connect the two universes. In the merged world, the Gundam pilots would have to deal with the threat of ninja attacks. They could use their Gundam building skills to create mechas that are better equipped to handle ninja abilities like genjutsu. Meanwhile, the Naruto characters would be fascinated by the Gundam battles and might try to participate using their own combat skills.
One idea could be a crossover with a mecha from another well - known series. For example, having a Gundam from Gundam Build Fighters team up with a Macross Valkyrie. They could face a common enemy that requires both their unique abilities to defeat.
Sei Iori is a great choice. His skills in building Gundams are well - known, and he could bring his expertise to a crossover situation. He might be able to adapt Gundam technology to work with the mechanics of another universe's mechas.
One great example could be a fanfiction where Reiji and Aila team up for an unexpected tournament. In this story, they might face challenges that test not only their Gundam building skills but also their relationship. Another could be a story set in a post - series world, where they explore their feelings for each other while dealing with the legacy of the Gundam Build Fighters competitions.