To create unique characters, start with their backstories. A character could be a Minecraft miner who got lost in a strange dimension and ended up in Roblox. They now have a mix of skills and a confused but determined personality. They might be trying to find their way back home while also learning about the new and exciting things in Roblox. Or a Roblox character who was curious about the more natural and simple life in Minecraft and decided to transform themselves into a blocky form, adapting some of the Minecraft ways of living while still having their Roblox charm.
In a Roblox x Minecraft fanfic, the plot could be centered around a competition. The best builders from Roblox and Minecraft are pitted against each other. They have to build a grand structure within a set time limit. However, as they start building, they realize that there are some common threats in both worlds that they need to deal with first, like a horde of zombies in Minecraft and some evil robots in Roblox. So, they decide to work together to fend off these threats before resuming the competition.
You can combine the aesthetics of the Badlands with Naruto - style ninja elements. For example, a character could be a nomadic archer who also has some basic wind - style jutsu, inspired by Naruto's own wind - style attacks.
You can give them distinct personalities. For example, a trainer who is super confident but a bit overconfident at times. He has a Charizard that he believes can win every event without much practice. Another character could be a shy trainer with a timid Pokemon like a Deerling. They grow together during the Rodeo experience.
First, give them unique appearances. For example, a character with bright pink hair and a robotic arm in an anime style. Then, give them distinct personalities like a shy but brave ninja or a confident and flamboyant mage. Their backstories are also important. Maybe the ninja was orphaned and trained hard to avenge their family.
You can give them unique limitations to their illusion quirk. For instance, a character might be able to create illusions only of things they've seen before, but they have an amazing memory, so they can create very detailed illusions.
You can create unique characters by giving them distinct personalities related to Giratina and Arceus. For example, a character who is obsessed with order and creation like Arceus, and is always trying to fix things in the Pokemon world. Another character could be more in tune with Giratina's chaotic nature, being a bit of an outcast and having a different view on the world. These opposing personalities can create interesting dynamics.
Mix different Pokemon traits. Let's say you create a character that is half - Bulbasaur and half - Squirtle. It would have a very interesting behavior, combining the calm and plant - loving nature of Bulbasaur with the more active and water - oriented behavior of Squirtle. You can also consider how the two different types of Pokemon might interact within this one character. For instance, the Bulbasaur part might want to stay in the sun and grow, while the Squirtle part wants to be near water. This internal conflict can make for a really engaging character in the fanfic.
Another way is to give the Eevee family members different goals or dreams. An Eevee might dream of evolving into Umbreon to protect the family at night, while another wants to stay as an Eevee forever to maintain its cuteness. These different goals can create conflict and also show the individuality within the family. Also, their relationships with other Pokemon in the story can further define their characters. For example, an Eevee that is friends with a Pikachu might be more electric - friendly and have some Pikachu - like behaviors.
You can combine the characteristics of characters from both franchises. For example, if you're crossing with One Piece, take the Devil Fruit powers and combine them with the demonic powers in Devilman Crybaby. A character could have the power of a Zoan - type Devil Fruit and also be a Devilman, having the ability to transform into a powerful hybrid form.
For the preditor, give it unique physical features like special markings or a different type of body structure. Also, endow it with cultural traits such as a specific way of hunting or a unique family structure. For the human, make their personality stand out. Maybe they are extremely brave or have a very in - depth knowledge of something relevant to the story.