It could be a joint effort. Zack would be there for sure, but the whole gang including Woody and London might also pitch in. London could use her resources to get the best possible care for Cody, while Woody could provide some comic relief to keep Cody's spirits up during his illness.
In the 'Cody Gets Sick' 'Suite Life on Deck' fanfic, perhaps Cody's friends would rally around him. They might bring him soup and try to cheer him up. Zack could be especially worried and try to make his brother feel better in his own clumsy way.
Well, it could be about Cody getting a really strange illness that only he can get on the ship. Maybe it's a virus that makes him see mermaids or something. And then Zack has to find a cure while also dealing with the chaos on the ship.
It could be Mr. Moseby. He might seem like he's trying to keep Cody from getting better because he doesn't want any disruptions on the ship. But in the end, it could turn out that he was just being strict to maintain order.
His teammates, Sasuke and Sakura, would surely be involved. Sasuke, although he may not show it as much, still cares about Naruto. He would keep an eye on Naruto's condition, and if there was any sign of danger, he would be ready to protect him. Sakura would be more hands - on with the medical care, checking his temperature, giving him medicine, and making sure he rests properly.
One common theme is friendship. Since Cody has a strong bond with Zack and their friends, many fanfics explore their friendships further. Another theme could be growth. Cody's character development over the course of the show can be expanded in fanfics.
Alfred would probably be the first one to take care of him. He's always there for Batman.
Sango could also take care of Kagome. As a strong and kind - hearted woman, she would know how to nurse Kagome back to health. She might use her knowledge of herbs and remedies to make Kagome feel better. Plus, she would offer emotional support to Kagome during her illness.
One popular 'A Suite Life' fanfic involving Cody might be those that focus on his academic adventures at the Tipton. For example, there could be fanfics where he teams up with his friends to solve a mystery within the hotel related to some historical event. You can start your search on fanfic platforms like FanFiction.net or Archive of Our Own.
In addition to his family and friends, the medical ninja in the village would be involved. They would be the ones to accurately diagnose Boruto's condition. Shizune, for example, could come and check on him, using her vast medical knowledge. And the other young medical ninjas might learn from this case, as Boruto's illness could be something new or unusual, so they would be eager to assist and gain experience while taking care of him.
Maybe Bailey catches a common cold. Then the other characters in 'The Suite Life' might take care of her, bringing her warm soup and making sure she rests. It could also lead to some comical situations, like when they try to make the medicine taste better.