I think Dawn would be a great character to include. She has her own unique charm and Pokemon - training skills. She could interact with Lucy in interesting ways, perhaps sharing tips on Pokemon contests. And of course, Misty could also be in the story. Her strong - willed personality would create some interesting dynamics, especially when it comes to her relationship with Ash.
Pikachu is a must - include character. Since Pikachu has been with Ash from the start, it would add a sense of familiarity and also provide great comedic moments and powerful battle assistance. Brock could also be a good addition. His knowledge of Pokemon care and breeding could be useful in the story.
Brock would be an excellent character to include. He has been with Ash and Misty for a long time and his knowledge of Pokemon and their care adds a lot to the story. Also, Pikachu is a must - have. Pikachu is Ash's closest companion and its cute and powerful nature always makes for great interactions. Another good character could be Tracey. He can bring in his drawing skills and his unique perspective on Pokemon. His addition can create some interesting storylines, like him trying to draw a new and rare Pokemon that Ash and Misty encounter.
Definitely Team Rocket. Their constant attempts to steal Pokemon would create a lot of action and comedic moments. Nurse Joy is also important as she can heal their Pokemon when they are injured. Officer Jenny can be there to enforce the law when Team Rocket causes trouble. And Cilan from the Unova region. His expertise in Pokemon types and flavors could add a unique aspect to the story.
I think Gary would be a great addition. His rivalry with Ash could create some interesting storylines. He might start off as a bit of a antagonist but then end up being an ally. Also, Dawn could be included. She has her own unique style of training Pokemon and her friendship with Ash could be further explored in the context of Ashley being there as well. And then there's May, who could bring in her Contest experiences and help Ash and Ashley in different ways related to Pokemon showcases.
Ash would be a great addition. Since he's a well - known character in the Pokemon universe, his presence could add more adventure and action. He could offer his own unique perspective on things and also be involved in some friendly Pokemon battles with May and Drew.
Loki could be an interesting addition. His mischievous nature could create all sorts of plot twists. He might initially be against Thor and Tony working together and try to sabotage their efforts, but then later be forced to join them when a greater threat emerges. Another great character to include is Pepper Potts. She could provide a different perspective, being a business - minded person in contrast to Thor and Tony's more adventurous and scientific minds. She could also be the voice of reason when their plans get a bit too wild.
Astrid would be a great character to include. She could be a rival or a friend to Fem Hiccup. Snotlout can also add some humor with his over - confident and sometimes clumsy nature. Fishlegs, with his vast knowledge of dragons, could be helpful in various situations. And Gobber, the blacksmith, could provide some wise advice and also some comical moments with his unique personality.
BajanCanadian could be a great addition. He could bring his own sense of humor and skills to the story, maybe creating some comical situations with Skydoesminecraft and Squid. For example, his attempts at cooking could lead to some hilarious disasters during their adventure.
Professor Oak would be an excellent addition. He could provide valuable advice to Ash and Lyra, maybe even send them on a special mission. Also, Dawn could be included. She could be a friend who joins them on their adventure for a while, bringing her own unique Pokemon and skills to the story.
Frieza is an obvious choice. He is the main villain associated with the destruction of Planet Vegeta. Having him in the fanfiction would create a lot of tension. Bardock and Gine could be on a mission to take revenge on Frieza, which would make for a very exciting and action - packed story.
Brock is also a good option. His knowledge of Pokemon and their care could be useful in the fanfiction. He could help Pikachu when it gets sick or injured, using his skills as a Pokemon breeder.