Jimmy and Marina are the central figures. Jimmy might be a brave and adventurous trainer, while Marina could be more of a strategic and calm one. Their different personalities will surely play a big part in the fanfiction as they interact with each other and with the Pokemon they encounter.
One idea could be that Jimmy and Marina team up to explore a new, uncharted region in the Pokemon world. They encounter rare and powerful Pokemon that no one has ever seen before. Another plot could be them participating in a special Pokemon tournament where the rules are unique and they have to strategize in new ways.
The main characters are obviously Jimmy, Sabrina, and their baby. Jimmy and Sabrina are the parents, and their actions, decisions, and relationship dynamics will be central to the story. The baby, though not able to make conscious decisions at first, will also have an impact on their lives and be a major factor in the plot development.
Obviously, Ash is one of the main characters. Since it's about him being a legendary Pokemon in this fanfiction, he's central to the story.
Obviously, Jimmy Neutron himself is very popular. He is the main character and his super - intelligent nature always drives the plot forward in fanfictions.
Obviously, Nyssa is a main character. She is likely to be the central focus of the story, driving the plot forward with her actions and decisions. Another main character could be her first Pokemon, which she has a special bond with. This Pokemon might be her constant companion throughout her adventures.
There might be other trainers in the fanfiction. They could be friends or rivals to Elaine. A rival trainer could constantly challenge Elaine to battles, pushing her to improve. And her friends could join her on adventures and offer support when she faces difficulties.
Obviously, Sawyer is a main character. But there could also be his Pokemon as important characters. Depending on the story, other trainers he meets during his journey might also be main characters. For example, if it's a story about a big tournament, the opponents he faces could be main characters too.
Obviously, Nate is a main character. His Pokemon are also important characters in the fanfiction. Depending on the story, there might be other trainers that Nate meets during his journey, like a rival trainer who constantly challenges him.
Well, obviously Fennel is one of the main characters. She is often the center of the story due to her role as a researcher. Sometimes, the main character from the Pokemon games might also be a main character in the fanfiction, interacting with Fennel and helping her with her research or getting help from her in their own Pokemon journey.
I'm not sure specifically as it depends on the particular fanfiction. It could be a young trainer with a special dragon - type Pokemon like a Charizard or Dragonite.