To draw manga chibi well, you need to focus on exaggerating the features. Make the heads larger, the eyes super cute, and simplify the body proportions. Also, use light and bold lines for emphasis.
The main similarity could be their cute and exaggerated style. But differences might lie in their personalities, outfits, or the scenarios they are placed in.
In fanfiction, chibi Naruto can be best characterized as a ball of sunshine. He's constantly chasing after his dreams, whether it's to be the best ninja or to get a bowl of ramen. He's not afraid to speak his mind and is very straightforward. His emotions are always on his sleeve. Chibi Sasuke is the opposite in some ways. He's reserved and a bit aloof. He values his alone time but deep down he's also lonely. When it comes to his relationship with chibi Naruto, he's slowly learning to open up. He's still competitive but in a more innocent, childish way. He's the type that will secretly admire Naruto's courage even if he doesn't say it out loud.
One interesting plot could be that chibi Naruto and chibi Sasuke get lost in a mysterious forest together. They have to work as a team to find their way out, which is a big challenge since they are so young. Along the way, they discover a strange creature that seems friendly at first but then turns out to be a bit of a trickster. Another plot could be a day - in - the - life kind of story where they are at the ninja academy and get into all sorts of silly mischief, like pranking their teachers or competing in a very unorthodox mini - ninja competition among the students.
Watching RWBY Chibi can give you a great deal of inspiration for writing fanfiction. Notice how the characters interact with each other. Are there any unspoken tensions or friendships that could be explored further? You can also look at the settings in the show. Maybe create a new location within the RWBY Chibi universe for your story. As for the writing process, start with an outline. Decide on the main plot, sub - plots, and how the characters will develop throughout the story. Keep in mind the light - hearted and comical nature of RWBY Chibi. Use vivid descriptions to bring your story to life, but also keep the language simple and easy to understand, just like the show's dialogue.
Itachi. He has his own moral code and he might see something in Chibi Sakura that reminds him of his own will to protect. He could form an alliance with her if he believes it would be for the greater good, like stopping the more extreme members of Akatsuki from causing too much destruction.