I think Rupert could be included. He has his own quirks and his relationship with the other characters could be explored further. For example, he could be jealous of the friendship between Henry and Charles. Also, the Right Hand Man would be a cool character to have. His strength and his connection to the Toppat Clan could create some intense situations in the fanfiction.
Reginald could be a great addition. His leadership skills and his own motives could add an interesting dynamic to the story. Maybe he could be initially against Henry and Charles working together but then come around. Another good character is Ellie. Her combat skills and her loyalty could be useful in their adventures.
Well, perhaps they could be in a situation where they are framed for a crime they didn't commit. They then have to work together to clear their names. Charles could use his plane to escape from the authorities while Henry figures out who is behind the frame - up. They could also encounter some new characters during this adventure who either help or hinder them.
One popular Henry Stickmin fanfiction might be those that explore alternate endings to the game's scenarios. For example, stories where Henry makes different choices during the heist and how that changes the overall outcome. Another could be fanfictions that focus on the backstories of the characters in the Henry Stickmin universe, like Ellie's life before she met Henry.
Piper, Henry's sister, can be an important character to include. Her sassy and headstrong nature can add some family - related drama to the fanfic. And if you want to introduce a new character, a mysterious superhero from another city who comes to Swellview and teams up with Henry could be really cool. This new character could bring new powers and a different perspective to the story.
It could be a tale of passion and sacrifice. Maybe he found love in the midst of war or had to face challenges to keep it alive.
One common theme is adventure. Since Henry Stickmin is often involved in heists and wild escapades, and Ellie Rose is his partner in crime in some scenarios, fanfics might revolve around their shared adventures.
There might be an older mutant who has already given up on using their powers and lives in seclusion. Charles Xavier meets this mutant while hiding his own powers. They start to share their experiences and the older mutant gives Xavier some unique perspectives on power, identity, and hiding. This relationship could be a central part of the fanfic, with both mutants learning from each other and evolving as characters.
Some dedicated gaming fanfic communities or forums could also be a good place to look. These places often have fans who are really into creating and sharing fanfics related to their favorite games, like Henry Stickmin. You might have to register and ask around to find the relevant fanfic.
Ray Manchester is often in these fanfictions. Since he's Henry's boss as Captain Man in the show, he can have interactions with the OC. Charlotte, Henry's friend, also frequently appears. She might be the OC's friend too or have some sort of rivalry with the OC. Piper, Henry's sister, could be another character. She might be curious about the OC and get involved in their relationship with Henry in different ways.
Definitely Captain Man from 'Henry Danger' itself. He's a key character in Henry's superhero life. Then, characters like Phoebe from 'The Thundermans' would be great. She has her own set of superpowers and a strong personality. Also, Sam from 'iCarly' could bring in a different dynamic. She's creative and could help Henry with some of his non - superhero related problems in a crossover. And maybe Chase from 'Lab Rats', who is also a super - powered individual and could team up well with Henry.
First, get to know the characters really well. Play the Henry Stickmin games multiple times to understand their personalities, motives, and relationships. Then, think of an interesting concept. It could be something like a 'what if' scenario, for example, what if Henry had to complete a heist in a completely different setting like outer space. Next, start with a simple outline of the story, including the beginning, middle, and end.