Honestly, I don't have the exact age of Rouge in the new Sonic comics at hand. It could be something you need to dig into the comic details or check with other avid Sonic comic fans to figure out.
One common theme is adventure. Since Sonic, Rouge, and Knuckles are all characters associated with action and exploration, many fanfictions focus on them going on quests or facing new challenges. For example, they might be looking for a lost relic or trying to stop an evil force from taking over their world.
The Sonic Adventure 2 Novel follows the story of Sonic and his friends as they face off against Dr. Eggman once again. It has elements of adventure, friendship, and the battle between good and evil.
Well, in Sonic Adventure 2's true story, Sonic is framed for crimes he didn't commit by Dr. Eggman. Meanwhile, Shadow, who was created by Eggman's grandfather, has his own journey of self - discovery. He initially believes he's an instrument of vengeance but later realizes there's more to his existence. And Knuckles also plays a role as he tries to protect the Master Emerald from falling into the wrong hands during all this chaos.
In the Japanese Dark Story, the characters might have different fates or development paths. Their actions and decisions may be more morally complex than in the standard story.
Rather than seeking out 'lemon' fanfic which often implies adult - oriented or inappropriate content, you could look for general Sonic and Rouge fanfic. Fanfic.net might have some interesting ones. Look for stories that focus on their friendship, teamwork in Sonic adventures, or their individual character development in the Sonic world.
One idea could be a story where Knuckles and Rouge have to team up to protect a hidden ancient relic from a new villain in the Sonic universe. They start off distrusting each other as usual, but as they face challenges, they gradually learn to work together better.
Well, 'The Mysterious Power' is another great one. It begins with Knuckles noticing a strange power around the Master Emerald. Rouge, being curious, decides to investigate. Sonic, as always, is there to help. The story unfolds with lots of mystery and action as they try to figure out the origin of this power and how to stop it from causing chaos.
Another fanfiction could focus on a behind - the - scenes look at how the Game Grumps would react to playing Sonic Adventure 2. You could write about their initial impressions, their favorite levels, and how they might struggle with some of the more difficult parts of the game. This could be a really fun and comical take on the game.