Create unique alien forms. Don't just rely on the ones already in the show. Invent new ones with cool abilities and appearances.
Put a twist on the Omnitrix itself. Maybe it has a hidden mode that only activates under certain extreme conditions. Explore how this new mode changes the way Ben battles and interacts with the world around him. Also, detailed descriptions of the action scenes and the transformation sequences can really make your fanfiction stand out.
Develop a really unique OC. Give them a distinct personality, backstory, and motivation. For example, an OC who is an alien - human hybrid with a complex family history related to different species in the Ben 10 universe. This will make readers more interested in the character's journey with the Omnitrix.
Focus on character development. Make your OC have unique traits and backstory that interact well with Obito's character. For example, if your OC has a strong sense of justice, it can contrast or complement Obito's more morally ambiguous actions.
Focus on character development. Give your OC a distinct personality, backstory, and goals. For example, if your OC has a troubled past that affects how they interact with Digimon, it will make the story more engaging.
Create a unique backstory for your OC. Give them a motivation and a history that ties into the Dragon Ball universe in an interesting way. For example, if your OC has a vendetta against a certain villain that Kefla has also faced, it can create an instant connection between them.
One way to make your Ben 10 Alien One Shots Fanfic stand out is to explore the emotional side of the aliens. Show how they feel when they're summoned by Ben, or when they're in a difficult situation. For example, if Diamondhead is about to be defeated, what emotions does he experience? You can also create new villains that are specifically designed to counter one of Ben's alien forms. This adds a new level of challenge and intrigue. Additionally, you could use a different narrative style, like first - person from the perspective of the alien, which can give a fresh perspective to the story.
Focus on unique character traits for your OC. Give them a distinct personality, like being extremely shy but also having a hidden wild side. Also, create a fresh take on the relationship between Lucifer and the OC. Instead of the typical love - hate, make it more of a slow - burn friendship that gradually turns into love.
You can focus on creating unique characterizations. For example, give Reverse Dipper some new quirks or abilities that are different from the regular Dipper. For Gideon, you could explore a more complex backstory that affects his relationship with Reverse Dipper. Also, use vivid descriptions of the Gravity Falls setting to make the story more immersive.
Use dialogue effectively. Have Darly and the OC have conversations that are not just about their feelings but also about their views on the world, how to deal with threats, and their hopes for the future. This will make their relationship seem more real. Also, add some mystery to the OC. Don't reveal everything about them at once. Let the readers be curious and keep reading to find out more about the character.
Incorporate real historical events into the story. Since 'Rurouni Kenshin' is set in a historical context, adding details about the Meiji Restoration or other relevant events can make the story more immersive. Also, focus on the character development of both the OC and Kenshin. Show how they change and grow because of their interactions.
Play with the relationships. Instead of just having the OC be a sidekick, create complex relationships. Maybe the OC has a romantic interest in one of the Sailor Scouts' enemies, which causes a rift in the group at first but then leads to a deeper understanding of the enemy's motives and a new way to defeat them. It's all about adding unexpected twists and turns to the story.