The Hashiras would likely show concern. Some, like Shinobu, would immediately start looking into possible medical solutions. Giyuu might be more reserved in his worry but would still keep a close eye on Tanjiro. The other demon slayers would also be affected. They look up to Tanjiro, so his sickness would lower the morale of the group. They would try to support each other while waiting for Tanjiro to recover.
The power levels would likely skyrocket. Saiyans are known for their natural fighting abilities and high power ceilings. Just having Goku and Vegeta on the team already makes a huge difference. If more Saiyans joined, their combined strength in battle would be formidable. They could easily take on stronger opponents that the Dragon Team previously struggled with.
Rarity would be more interested in how the power levels are presented visually. If there are any shiny or impressive displays of power, she would be all about it. Pinkie Pie would just turn it into a game, making up her own power levels for the Mane 6 and seeing how they stack up against the Dragon Ball characters. Applejack would think the power levels are a bit over - the - top but would respect the fact that it's part of the Dragon Ball world.
The team would be extremely worried. Tyler, as the Red Ranger, would likely take charge immediately. He'd be determined to find out who hurt Kendall and make them pay. The other Rangers would also be very concerned. Chase might use his skills to quickly assess Kendall's injuries, while Koda would be visibly upset and want to help in any way he could.
Sasuke would likely be devastated. Despite their past differences, Naruto was his rival and in a way, his closest friend. He might go into a deep state of regret and isolation. Sakura would be heart - broken. She loved Naruto, and his death would be a huge blow to her. She might become more withdrawn and focus all her energy on her medical ninjutsu. Kakashi would be filled with a sense of failure. He was Naruto's teacher, and he would feel responsible for not being able to protect him.
Perhaps there is a group of characters. There could be a mentor figure who has a high power level and helps the protagonist, who starts with a much lower power level. And there might be antagonists with their own distinct power levels that pose a threat to the main characters.
Well, it could have various unique features. Maybe it has a complex power system where characters have different power levels that drive the plot. For example, the power levels might determine the social hierarchy in the story world.
In Naruto fanfiction, power levels can vary greatly. Some fanfictions might boost the power of a character like Naruto himself, making his already strong Rasengan even more powerful, perhaps with new elements added. Others might focus on secondary characters and give them powers on par with the main characters. For example, a fanfiction could make Rock Lee able to use some form of ninjutsu on top of his taijutsu skills, which would significantly increase his power level in that fictional story.
Well, you could start by looking at the characters' abilities, skills, and the scope of their influence. Also, consider their achievements and how they fare against opponents.