A mysterious old Pokemon trainer who has a lot of knowledge about ancient Pokemon moves. He could guide Rusty on his journey.
An old and wise Pokemon sage. This character could live in a hidden forest and have knowledge about ancient Pokemon powers. They could play a role in either helping Pokemon Hunter J find redemption or in protecting the Pokemon from her. For example, they could give J some cryptic advice that makes her think twice about her actions.
An old - fashioned Pokemon breeder who has a deep connection with the traditional ways of raising Pokemon. They could provide the main characters with valuable advice on how to make their Pokemon stronger and healthier. However, they might also be a bit stubborn about sticking to the old ways and this could cause some conflicts with the more modern - thinking characters in the fanfic.
There could also be other trainers who interact with Rusty. These trainers might have different goals and personalities. Some could be rivals, trying to outdo Rusty in Pokemon battles, while others might be friends, joining him on his adventures in the Pokemon world.
A wise old owl could be added. It could give advice to the little white horse. Also, a mischievous fox that sometimes gets the horse into trouble but also helps it out of tight spots.
A mysterious elven archer could be added. This archer could be on a quest for revenge against the orcs and initially see Bruz as just another target. But as the story progresses, they realize that Bruz is different and they could end up working together.
An American wizard detective. He could be investigating strange magical happenings in the wizarding world of America. The Potter character could cross paths with him and end up teaming up to solve a big case.
A healer character could be added. This healer could be the one who discovers a hidden power within the apprentice that could change the course of their journey. Another potential character could be a mysterious traveler. This traveler has seen many different worlds and has knowledge that could either help or hinder the apprentice.
A young and curious wizard could be added. This wizard could be intrigued by the devil's unbreakable nature and try to study it, leading to some interesting interactions. Another character could be an angel who has lost its way and forms a strange bond with the devil. Or perhaps a talking animal, like a raven, that serves as the devil's confidant and gives it advice from a different perspective.
A group of nomadic mice. They have different skills and traditions compared to the Redwall mice. Their arrival at the abbey could cause some cultural clashes at first, but eventually, they could learn from each other and contribute to the abbey's growth. This would add more diversity to the characters in the fanfiction.
A young stargazer from Earth could be a new character. This character could be someone who has always been fascinated by the stars and dreams of traveling to other planets. When the Little Prince lands on Earth again, they meet and the stargazer becomes his guide on Earth, showing him all the new things that have happened since his last visit. Another potential character could be a talking moonbeam. It could offer the Little Prince advice and wisdom, as well as some magical abilities to help him on his journey.